File size: 26,457 Bytes
2421ce3
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Supra-μBench — evaluation suite for very small base language models (<100M parameters).

Usage:
    python evaluate.py --model_dir path/to/model
                       [--batch_size 16] [--device auto] [--dtype float32]
                       [--max_length 512] [--tasks 1a,4b] [--output results.json]
                       [--show_levels] [--trust_remote_code] [--list_tasks]

All tasks are scored purely via log-likelihood (no generation).
"""

import argparse
import importlib.util
import json
import math
import sys
import time
from collections import defaultdict
from pathlib import Path

import torch
import torch.nn.functional as F
from transformers import AutoConfig, AutoModelForCausalLM, AutoTokenizer

from tasks import BENCHMARK_NAME, VERSION, DOMAINS, DOMAIN_WEIGHTS, build_tasks

DTYPES = {"float32": torch.float32, "float16": torch.float16, "bfloat16": torch.bfloat16}


# ----------------------------------------------------------------------------
# Model wrapper
# ----------------------------------------------------------------------------
class _LogitsOut:
    def __init__(self, logits):
        self.logits = logits

class _CausalAdapter(torch.nn.Module):
    """Make a custom module look like a causal LM: forward(input_ids=...).logits."""

    def __init__(self, inner, context):
        super().__init__()
        self.inner = inner
        self.config = type("Cfg", (), {
            "max_position_embeddings": context,
            "n_positions": context,
            "n_ctx": context,
            "seq_length": context,
        })()

    def forward(self, input_ids=None, attention_mask=None, **kwargs):
        ids = input_ids if input_ids is not None else kwargs.get("ids")
        try:
            out = self.inner(input_ids=ids, attention_mask=attention_mask)
        except Exception:
            try:
                out = self.inner(ids)
            except Exception:
                out = self.inner(ids=ids)
        if torch.is_tensor(out):
            logits = out
        elif isinstance(out, dict):
            logits = out.get("logits", out.get("logit"))
            if not torch.is_tensor(logits):
                raise TypeError(f"forward dict has no logits/logit tensor, keys={list(out)}")
        else:
            logits = getattr(out, "logits", None)
            if not torch.is_tensor(logits):
                raise TypeError(f"unsupported forward return: {type(out)}")
        return _LogitsOut(logits)

def _snapshot(model_dir):
    path = Path(model_dir)
    if path.is_dir():
        return path
    from huggingface_hub import snapshot_download
    return Path(snapshot_download(model_dir))

def _import_py(repo, filename):
    path = Path(repo) / filename
    spec = importlib.util.spec_from_file_location(f"_supra_{path.stem}", path)
    mod = importlib.util.module_from_spec(spec)
    sys.modules[spec.name] = mod  # dataclasses looks the class up in sys.modules during class body
    sys.path.insert(0, str(repo))
    try:
        spec.loader.exec_module(mod)
    except Exception:
        sys.modules.pop(spec.name, None)
        raise
    finally:
        sys.path.pop(0)
    return mod

def _load_state(model, repo):
    names = ("model.safetensors", "pytorch_model.bin", "model.bin", "model.pt", "model.pth")
    weight = next((Path(repo) / n for n in names if (Path(repo) / n).is_file()), None)
    if weight is None:
        cands = [p for p in Path(repo).iterdir()
                 if p.suffix in {".safetensors", ".bin", ".pt", ".pth"}
                 and "optim" not in p.name and "sched" not in p.name]
        if len(cands) != 1:
            raise FileNotFoundError(f"No unique weight file in {repo}: {cands}")
        weight = cands[0]
    if weight.suffix == ".safetensors":
        from safetensors.torch import load_file
        state = load_file(str(weight))
    else:
        state = torch.load(weight, map_location="cpu")
        if isinstance(state, dict):
            for key in ("state_dict", "model", "module"):
                if key in state and isinstance(state[key], dict):
                    state = state[key]
                    break
    # Strip a wrapper prefix only when every key has it (may be nested).
    for prefix in ("module.", "_orig_mod.", "model."):
        while state and all(k.startswith(prefix) for k in state):
            state = {k[len(prefix):]: v for k, v in state.items()}
    missing, unexpected = model.load_state_dict(state, strict=False)
    if missing or unexpected:
        print(f"  weight load: missing={len(missing)} unexpected={len(unexpected)} (kept)")
    return model

def _load_tokenizer(repo, trust_remote_code):
    repo = Path(repo)
    try:
        return AutoTokenizer.from_pretrained(repo, trust_remote_code=trust_remote_code)
    except Exception as exc:
        tok_json = repo / "tokenizer.json"
        if tok_json.is_file():
            from tokenizers import Tokenizer
            from transformers import PreTrainedTokenizerFast
            return PreTrainedTokenizerFast(tokenizer_object=Tokenizer.from_file(str(tok_json)))
        spm = repo / "tokenizer.model"
        if spm.is_file():
            from transformers import LlamaTokenizer
            return LlamaTokenizer(vocab_file=str(spm), legacy=False)
        vocab, merges = repo / "vocab.json", repo / "merges.txt"
        if vocab.is_file() and merges.is_file():
            from transformers import GPT2TokenizerFast
            return GPT2TokenizerFast(vocab_file=str(vocab), merges_file=str(merges))
        raise SystemExit(
            f"No usable tokenizer in {repo} ({exc}). "
            "Need tokenizer.json, tokenizer.model, or vocab.json+merges.txt."
        ) from exc

def _load_custom_repo(model_dir, dtype, trust_remote_code):
    repo = _snapshot(model_dir)
    cfg = json.loads((repo / "config.json").read_text(encoding="utf-8"))
    if (repo / "model.py").is_file():
        mod = _import_py(repo, "model.py")
        if hasattr(mod, "WorkspaceConfig") and hasattr(mod, "RecurrentWorkspace"):
            fields = {f.name for f in mod.WorkspaceConfig.__dataclass_fields__.values()}
            kwargs = {k: v for k, v in cfg.items() if k in fields}
            inner = mod.RecurrentWorkspace(mod.WorkspaceConfig(**kwargs))
            context = int(getattr(inner.cfg, "context", cfg.get("context", 512)))
            _load_state(inner, repo)
            tok = _load_tokenizer(repo, trust_remote_code)
            eos = cfg.get("eos_id", cfg.get("eos_token_id"))
            if tok.eos_token_id is None and eos is not None:
                tok.eos_token_id = int(eos)
            if tok.pad_token_id is None and tok.eos_token_id is not None:
                tok.pad_token_id = tok.eos_token_id
            return tok, _CausalAdapter(inner, context)
    for path in sorted(repo.glob("modeling_*.py")):
        mod = _import_py(repo, path.name)
        for obj in vars(mod).values():
            if isinstance(obj, type) and hasattr(obj, "from_pretrained"):
                model = obj.from_pretrained(repo, torch_dtype=dtype, trust_remote_code=True)
                return _load_tokenizer(repo, trust_remote_code), model
    raise ValueError(
        f"{model_dir} is not a Transformers model (no model_type) and has no loadable "
        "model.py (WorkspaceConfig/RecurrentWorkspace) or modeling_*.py."
    )

def load_causal_lm(model_dir, dtype, trust_remote_code):
    try:
        AutoConfig.from_pretrained(model_dir, trust_remote_code=trust_remote_code)
        tok = AutoTokenizer.from_pretrained(model_dir, trust_remote_code=trust_remote_code)
        model = AutoModelForCausalLM.from_pretrained(
            model_dir, torch_dtype=dtype, trust_remote_code=trust_remote_code
        )
        return tok, model
    except Exception as exc:
        text = str(exc)
        custom = "model_type" in text or "Unrecognized model" in text or "trust_remote_code" in text
        if not trust_remote_code or not custom:
            raise
        print(f"  standard HF load failed ({exc.__class__.__name__}). Loading custom repo code ...")
        return _load_custom_repo(model_dir, dtype, trust_remote_code)

class LMScorer:
    def __init__(self, model_dir, device, dtype, max_length, batch_size, trust_remote_code=False):
        self.tokenizer, self.model = load_causal_lm(model_dir, dtype, trust_remote_code)
        try:
            self.model.to(device=device, dtype=dtype)
        except Exception as exc:
            print(f"  model.to(dtype=...) failed ({exc.__class__.__name__}); casting floating parameters only")
            self.model.to(device)
            with torch.no_grad():
                for p in self.model.parameters():
                    if p.is_floating_point() and p.dtype != dtype:
                        p.data = p.data.to(dtype=dtype)
        self.model.eval()
        self.device = device
        self.batch_size = batch_size

        # Every sequence starts with a prefix token (BOS, or EOS as fallback, like lm-eval).
        prefix = self.tokenizer.bos_token_id
        if prefix is None:
            prefix = self.tokenizer.eos_token_id
        if prefix is None:
            raise ValueError("Tokenizer has neither a BOS nor an EOS token; cannot build a start prefix.")
        self.prefix_id = prefix

        model_max = None
        for attr in ("max_position_embeddings", "n_positions", "n_ctx", "seq_length"):
            v = getattr(self.model.config, attr, None)
            if isinstance(v, int) and v > 0:
                model_max = v
                break
        self.max_length = min(max_length, model_max) if model_max else max_length
        self.n_params = sum(p.numel() for p in self.model.parameters())
        self._cache = {}

    # -- tokenization ---------------------------------------------------------
    def _encode(self, text):
        if not text:
            return []
        return self.tokenizer.encode(text, add_special_tokens=False)

    @staticmethod
    def _split_ws(context, continuation):
        """Move trailing whitespace of the context to the continuation (lm-eval convention)."""
        n = len(context) - len(context.rstrip())
        if n > 0:
            continuation = context[-n:] + continuation
            context = context[:-n]
        return context, continuation

    def _prepare(self, context, continuation):
        context, continuation = self._split_ws(context, continuation)
        if context:
            whole = self._encode(context + continuation)
            ctx = self._encode(context)
            if whole[: len(ctx)] == ctx and len(whole) > len(ctx):
                cont = whole[len(ctx):]
            else:  # tokenizer merged across the boundary -> fallback
                cont = self._encode(continuation)
        else:
            ctx, cont = [], self._encode(continuation)
        if not cont:
            raise ValueError(f"Empty continuation for context {context!r}")
        full = [self.prefix_id] + ctx + cont
        if len(full) - 1 > self.max_length:
            if len(cont) >= self.max_length:
                raise ValueError("Continuation is longer than max_length.")
            full = full[-(self.max_length + 1):]  # left-truncate the context
        return full, len(cont)

    # -- scoring ---------------------------------------------------------------
    @torch.inference_mode()
    def loglikelihood(self, requests):
        """requests: list of (context, continuation) -> list of summed log-probs (nats)."""
        unique = {}
        for i, req in enumerate(requests):
            unique.setdefault(req, []).append(i)
        keys = [k for k in unique if k not in self._cache]
        prepared = [self._prepare(c, x) for c, x in keys]
        order = sorted(range(len(keys)), key=lambda j: -len(prepared[j][0]))

        for b in range(0, len(order), self.batch_size):
            idx = order[b: b + self.batch_size]
            inputs = [prepared[j][0][:-1] for j in idx]
            T = max(len(x) for x in inputs)
            input_ids = torch.full((len(idx), T), self.prefix_id, dtype=torch.long)
            attn = torch.zeros((len(idx), T), dtype=torch.long)
            for r, x in enumerate(inputs):
                input_ids[r, : len(x)] = torch.tensor(x, dtype=torch.long)
                attn[r, : len(x)] = 1
            def _store(row_logits, j):
                full, n_cont = prepared[j]
                L = len(full) - 1
                lp = F.log_softmax(row_logits[L - n_cont: L].float(), dim=-1)
                tgt = torch.tensor(full[-n_cont:], device=lp.device).unsqueeze(1)
                self._cache[keys[j]] = lp.gather(1, tgt).sum().item()

            try:
                logits = self.model(input_ids=input_ids.to(self.device),
                                    attention_mask=attn.to(self.device)).logits
                for r, j in enumerate(idx):
                    _store(logits[r], j)
            except Exception as exc:
                print(f"  batch forward failed ({exc.__class__.__name__}); retrying one sequence at a time")
                for r, j in enumerate(idx):
                    one = torch.tensor([inputs[r]], device=self.device)
                    _store(self.model(input_ids=one).logits[0], j)

        results = [None] * len(requests)
        for req, idxs in unique.items():
            for i in idxs:
                results[i] = self._cache[req]
        return results

    @torch.inference_mode()
    def rolling_loglikelihood(self, text):
        """Sliding-window log-likelihood of a full text (nats), stride = max_length / 2."""
        seq = [self.prefix_id] + self._encode(text)
        L = self.max_length
        stride = max(1, L // 2)
        total, s = 0.0, 1
        while s < len(seq):
            e = min(s + stride, len(seq))
            start = max(0, e - L)
            inp = torch.tensor([seq[start:e]], device=self.device)
            logits = self.model(input_ids=inp).logits[0].float()
            lp = F.log_softmax(logits[s - 1 - start: e - 1 - start], dim=-1)
            tgt = torch.tensor(seq[s:e], device=self.device).unsqueeze(1)
            total += lp.gather(1, tgt).sum().item()
            s = e
        return total


# ----------------------------------------------------------------------------
# Task evaluation
# ----------------------------------------------------------------------------
def _softmax_prob(scores, label):
    m = max(scores)
    exps = [math.exp(s - m) for s in scores]
    return exps[label] / sum(exps)


def aggregate(records, metric):
    if metric == "group_acc":
        groups = defaultdict(list)
        for i, r in enumerate(records):
            # items without a group are scored as single units
            groups[r["group"] if r["group"] is not None else f"__single_{i}"].append(r)
        units = [{
            "correct": all(x["correct"] for x in g),
            "chance": math.prod(x["chance"] for x in g),
            "p_correct": math.prod(x["p_correct"] for x in g),
            "rr": sum(x["rr"] for x in g) / len(g),
            "level": max(x["level"] for x in g),
        } for g in groups.values()]
    else:
        units = records

    n = len(units)
    acc = sum(u["correct"] for u in units) / n
    chance = sum(u["chance"] for u in units) / n
    score = max(0.0, (acc - chance) / (1.0 - chance)) * 100.0
    se_acc = math.sqrt(acc * (1.0 - acc) / n)
    se_score = se_acc / (1.0 - chance) * 100.0

    by_lvl = defaultdict(list)
    for u in units:
        by_lvl[u["level"]].append(u)
    levels = {}
    for lvl in sorted(by_lvl):
        us = by_lvl[lvl]
        levels[lvl] = {
            "n": len(us),
            "acc": sum(u["correct"] for u in us) / len(us),
            "chance": sum(u["chance"] for u in us) / len(us),
        }
    return {
        "kind": "choice", "n_items": len(records), "n_units": n,
        "item_acc": sum(r["correct"] for r in records) / len(records),
        "acc": acc, "chance": chance, "score": score, "se": se_score,
        "p_correct": sum(u["p_correct"] for u in units) / n,
        "mrr": sum(u["rr"] for u in units) / n,
        "levels": levels,
    }


def evaluate_choice_task(scorer, task, dump=None):
    scoring = task["scoring"]
    default_null = task.get("null_context", "Answer:")
    requests, plan = [], []

    for it in task["items"]:
        entries = []
        if "contexts" in it:  # multi-context (partial scoring, Winograd style)
            nb = len(it["continuation"].encode("utf-8"))
            for ctx in it["contexts"]:
                requests.append((ctx, it["continuation"]))
                entries.append((len(requests) - 1, None, nb))
        else:
            for ch in it["choices"]:
                requests.append((it.get("context", ""), ch))
                ci, ni = len(requests) - 1, None
                if scoring == "pmi":
                    requests.append((it.get("null_context", default_null), ch))
                    ni = len(requests) - 1
                entries.append((ci, ni, len(ch.encode("utf-8"))))
        plan.append(entries)

    lls = scorer.loglikelihood(requests)

    records = []
    for it, entries in zip(task["items"], plan):
        scores = []
        for ci, ni, nb in entries:
            ll = lls[ci]
            if scoring == "sum":
                scores.append(ll)
            elif scoring == "mean_byte":
                scores.append(ll / max(nb, 1))
            elif scoring == "pmi":
                scores.append(ll - lls[ni])
            else:
                raise ValueError(f"Unknown scoring: {scoring}")
        label = it["label"]
        pred = max(range(len(scores)), key=lambda k: scores[k])
        rank = 1 + sum(1 for s in scores if s > scores[label])
        # mean_byte scores are per byte -> rescale to sequence level, otherwise P(corr) is ~uniform
        scale = sum(nb for _, _, nb in entries) / len(entries) if scoring == "mean_byte" else 1.0
        records.append({
            "level": it["level"],
            "correct": pred == label,
            "chance": 1.0 / len(scores),
            "p_correct": _softmax_prob([s * scale for s in scores], label),
            "rr": 1.0 / rank,
            "group": it.get("group"),
        })
        if dump is not None:
            dump.append({
                "task": task["name"], "level": it["level"], "group": it.get("group"),
                "context": it.get("context", it.get("contexts")),
                "choices": it.get("choices", it.get("continuation")),
                "scores": [round(s, 4) for s in scores], "label": label, "pred": pred,
                "correct": pred == label,
            })
    return aggregate(records, task.get("metric", "acc"))


def evaluate_bpb_task(scorer, task):
    total_ll, total_bytes, per_text = 0.0, 0, []
    for text in task["texts"]:
        ll = scorer.rolling_loglikelihood(text)
        nb = len(text.encode("utf-8"))
        total_ll += ll
        total_bytes += nb
        per_text.append(-ll / (math.log(2) * nb))
    bpb = -total_ll / (math.log(2) * total_bytes)
    lo, hi = task["anchors"]["floor"], task["anchors"]["ceiling"]
    score = 100.0 * (math.log(lo) - math.log(bpb)) / (math.log(lo) - math.log(hi))
    return {"kind": "bpb", "n_items": len(task["texts"]), "bpb": bpb,
            "bpb_per_text": per_text, "score": min(100.0, max(0.0, score)), "se": 0.0}


# ----------------------------------------------------------------------------
# Index
# ----------------------------------------------------------------------------
def compute_index(tasks, results):
    by_dom = defaultdict(list)
    for t in tasks:
        by_dom[t["domain"]].append(results[t["name"]])
    dom_scores, dom_se = {}, {}
    for d, rs in by_dom.items():
        k = len(rs)
        dom_scores[d] = sum(r["score"] for r in rs) / k
        dom_se[d] = math.sqrt(sum(r["se"] ** 2 for r in rs)) / k
    wsum = sum(DOMAIN_WEIGHTS[d] for d in dom_scores)
    index = sum(DOMAIN_WEIGHTS[d] * s for d, s in dom_scores.items()) / wsum
    index_se = math.sqrt(sum((DOMAIN_WEIGHTS[d] / wsum) ** 2 * dom_se[d] ** 2 for d in dom_scores))
    return dom_scores, dom_se, index, index_se


# ----------------------------------------------------------------------------
# Reporting
# ----------------------------------------------------------------------------
def print_report(meta, tasks, results, dom_scores, dom_se, index, index_se, show_levels):
    line = "=" * 96
    print("\n" + line)
    print(f"{BENCHMARK_NAME} v{VERSION}")
    print(f"Model: {meta['model_dir']}  |  Params: {meta['n_params'] / 1e6:.1f}M  |  "
          f"max_length: {meta['max_length']}  |  device: {meta['device']}  |  {meta['runtime_s']:.1f}s")
    print(line)
    print(f"{'Task':<32}{'Dom':<5}{'N':>5}{'Acc%':>8}{'Chance%':>9}{'NormAcc':>9}{'±SE':>7}"
          f"{'P(corr)':>9}{'MRR':>7}")
    print("-" * 96)
    for t in tasks:
        r = results[t["name"]]
        if r["kind"] == "bpb":
            print(f"{t['name']:<32}{t['domain']:<5}{r['n_items']:>5}   BPB = {r['bpb']:.4f}"
                  f"{'':>6}{r['score']:>9.1f}   (anchor-normalized)")
            continue
        print(f"{t['name']:<32}{t['domain']:<5}{r['n_units']:>5}{r['acc'] * 100:>8.1f}"
              f"{r['chance'] * 100:>9.1f}{r['score']:>9.1f}{r['se']:>7.1f}"
              f"{r['p_correct']:>9.3f}{r['mrr']:>7.3f}")
        if show_levels:
            lv = "  ".join(f"L{l}: {v['acc'] * 100:.0f}% (n={v['n']}, c={v['chance'] * 100:.0f}%)"
                           for l, v in r["levels"].items())
            print(f"{'':<6}{lv}")
    print("-" * 96)
    print("Domain scores (0-100, chance-normalized):")
    for d in DOMAINS:
        if d in dom_scores:
            print(f"  {d} {DOMAINS[d]:<34} w={DOMAIN_WEIGHTS[d]:.2f}   "
                  f"{dom_scores[d]:6.1f}  ± {dom_se[d]:.1f}")
    print(line)
    print(f"  μBench-Intelligence-Index:  {index:.2f}  ± {index_se:.2f}  (SE, item sampling)")
    print(line)
    print("Note: treat index differences < 2*sqrt(SE_a^2 + SE_b^2) as noise.\n")


# ----------------------------------------------------------------------------
# Main
# ----------------------------------------------------------------------------
def resolve_device(arg):
    if arg != "auto":
        return torch.device(arg)
    if torch.cuda.is_available():
        return torch.device("cuda")
    if getattr(torch.backends, "mps", None) is not None and torch.backends.mps.is_available():
        return torch.device("mps")
    return torch.device("cpu")


def parse_args():
    p = argparse.ArgumentParser(description=f"{BENCHMARK_NAME} evaluation suite")
    p.add_argument("--model_dir", help="Local model folder or Hugging Face model id (e.g. org/name); must include the tokenizer")
    p.add_argument("--batch_size", type=int, default=16)
    p.add_argument("--device", default="auto", help="auto | cpu | cuda | cuda:0 | mps")
    p.add_argument("--dtype", default="float32", choices=list(DTYPES))
    p.add_argument("--max_length", type=int, default=512)
    p.add_argument("--tasks", default=None, help="Comma-separated task names or prefixes, e.g. '1a,4b'")
    p.add_argument("--output", default=None, help="Write results as JSON to this path")
    p.add_argument("--dump", default=None, help="Write per-item predictions as JSONL to this path")
    p.add_argument("--show_levels", action="store_true", help="Print accuracy per difficulty level")
    p.add_argument("--trust_remote_code", action="store_true",
                   help="Load custom modeling code (configuration_*.py, modeling_*.py) from a local folder or the HF Hub")
    p.add_argument("--list_tasks", action="store_true", help="List tasks and exit")
    return p.parse_args()


def main():
    args = parse_args()
    tasks = build_tasks()

    if args.list_tasks:
        for t in tasks:
            n = len(t.get("items", t.get("texts", [])))
            print(f"{t['name']:<32}{t['domain']:<5}{n:>4}  {t['description']}")
        return
    if not args.model_dir:
        raise SystemExit("--model_dir is required (local folder or HF model id).")

    if args.tasks:
        wanted = [w.strip() for w in args.tasks.split(",") if w.strip()]
        tasks = [t for t in tasks if t["name"] in wanted or t["name"].split("_")[0] in wanted]
        if not tasks:
            raise SystemExit(f"No tasks match {wanted}.")

    device = resolve_device(args.device)
    print(f"Loading model from {args.model_dir} on {device} ({args.dtype}) ...")
    scorer = LMScorer(args.model_dir, device, DTYPES[args.dtype], args.max_length,
                      args.batch_size, args.trust_remote_code)

    results, t0 = {}, time.time()
    dump_rows = [] if args.dump else None
    for t in tasks:
        ts = time.time()
        if t.get("kind") == "bpb":
            results[t["name"]] = evaluate_bpb_task(scorer, t)
        else:
            results[t["name"]] = evaluate_choice_task(scorer, t, dump_rows)
        print(f"  [{t['name']}] score={results[t['name']]['score']:.1f}  ({time.time() - ts:.1f}s)")

    dom_scores, dom_se, index, index_se = compute_index(tasks, results)
    meta = {
        "benchmark": BENCHMARK_NAME, "version": VERSION, "model_dir": args.model_dir,
        "n_params": scorer.n_params, "max_length": scorer.max_length, "device": str(device),
        "dtype": args.dtype, "runtime_s": time.time() - t0,
    }
    print_report(meta, tasks, results, dom_scores, dom_se, index, index_se, args.show_levels)

    if args.output:
        out = {
            "meta": meta,
            "tasks": {t["name"]: {"domain": t["domain"], "format": t["format"],
                                  "scoring": t.get("scoring"), **results[t["name"]]} for t in tasks},
            "domains": {d: {"name": DOMAINS[d], "weight": DOMAIN_WEIGHTS[d],
                            "score": dom_scores[d], "se": dom_se[d]} for d in dom_scores},
            "mubench_intelligence_index": index,
            "mubench_intelligence_index_se": index_se,
        }
        with open(args.output, "w", encoding="utf-8") as f:
            json.dump(out, f, indent=2, ensure_ascii=False)
        print(f"Results written to {args.output}")

    if args.dump:
        with open(args.dump, "w", encoding="utf-8") as f:
            for row in dump_rows:
                f.write(json.dumps(row, ensure_ascii=False) + "\n")
        print(f"Per-item predictions written to {args.dump}")


if __name__ == "__main__":
    main()