---
language:
- en
license: apache-2.0
base_model: sapientinc/HRM-Text-1B
library_name: keras
pipeline_tag: text-generation
tags:
- hrm
- prefix-lm
- code
- tool-use
- keras
- keras-hub
- sft
---

# HRM-Text-1B Code & Tool-Use SFT

This page tracks successive code and tool-use SFT stages of
[`sapientinc/HRM-Text-1B`](https://huggingface.co/sapientinc/HRM-Text-1B),
saved as native Keras/KerasHub presets. The current default revision and the
immutable `stage-a-v1` tag are a full-parameter Stage A pilot. They adapt the
base PrefixLM to the study's coding and tool-use transcript syntax.

> **Pilot release.** This model has not yet undergone downstream benchmark
> evaluation. Training loss is not a measure of coding-agent or tool-use task
> performance. Do not treat it as a production-ready agent.

## Release lineage

| Tag | State | Availability |
| --- | --- | --- |
| `stage-a-v1` | Completed 10M-response-token Stage A pilot, seed 17 | Current default revision |
| `stage-b-v1` | Stage B continuation | Not trained or published yet |

Stage B will be published as `stage-b-v1` on this same page only after its
training and release checks complete. `stage-a-v1` will remain immutable for
reproducibility.

## Training result

![Training loss](training-loss.png)

| Metric | Value |
| --- | ---: |
| Training budget | 10,000,147 response tokens |
| Serialized tokens | 19,650,833 |
| Microbatches / optimizer updates | 38,248 / 4,781 planned |
| Final training loss | 0.03527 |
| Validation loss | 0.02808 |
| Final validation token accuracy | 0.90152 |
| Hardware | One NVIDIA H100 80 GB |
| Wall time | 14 h 44 min |

The chart uses the canonical completed-run telemetry segment. The thin trace is
the loss logged every ten microbatches; the dark trace is a 25-point trailing
mean.

## Training data and protocol

- Dataset: [`pzarzycki/hrm-text-code-tools-sft`](https://huggingface.co/datasets/pzarzycki/hrm-text-code-tools-sft), canonical v2 Stage A.
- Source: `nvidia/OpenCodeInstruct` pinned to revision
  `8f3ba5bafe4d6e8db46082cf7ae6741bc370604d` (CC-BY-4.0).
- The deterministic pilot selection contains 38,248 rows from the sealed
  Stage A training split. It is not a full pass over all 1.13M Stage A rows.
- Context cap: 4,096 serialized tokens. Oversized rows were rejected during
  data preparation; no example was silently truncated.
- The only condition used was `direct`.

The learned SFT envelope is:

```text
<|im_start|><|object_ref_start|>instruction<|im_end|>response<|box_end|>
```

`<user>`, `<assistant>`, `<tools>`, `<tool_call>`, and `<tool_result>` inside
the content are ordinary learned transcript markup, not additional pretrained
HRM control tokens.

## Optimization

Full-parameter BF16 fine-tuning used KerasHub HRM-Text support, AdamW
(`lr=3e-5`, `beta_1=0.9`, `beta_2=0.95`, `weight_decay=0.1`), global gradient
clip norm 1.0, EMA (`0.999`), batch size 1 with gradient accumulation 8,
and 3% warmup. Loss is applied only to response tokens, including
`<|box_end|>`; prefix tokens receive zero loss weight.

## Files

| Path | Purpose |
| --- | --- |
| `preset/` | Final Keras preset: model configuration, tokenizer, preprocessor, and final weights. |
| `checkpoint-00020000.keras` | Full Keras checkpoint saved at microbatch 20,000. |
| `training/pilot-completion.json` | Immutable completion manifest and metrics SHA-256. |
| `training/pilot-completed-metrics.jsonl` | Canonical first-run loss, learning-rate, token, and throughput telemetry. |
| `training/gpu.jsonl` | GPU utilization, VRAM, power, and temperature telemetry. |
| `training/platform.jsonl` | RunPod GPU/CPU utilization samples. |
| `training/history.json` | Final Keras training and validation summary. |
| `training/tensorboard/` | TensorBoard events for the completed training run. |
| `ARTIFACTS.tsv` | Sizes and release-integrity checksums for the key artifacts. |

## Loading and prompting

The preset requires a KerasHub build with HRM-Text support. With the study's
HRM-enabled KerasHub branch installed, load the preset from a local clone or
using the Hugging Face handle:

```python
from keras_hub.models import HrmTextCausalLM

model = HrmTextCausalLM.from_preset(
    "hf://pzarzycki/hrm-text-1b-code-tools-sft"
)
prompt = (
    "<|im_start|><|object_ref_start|>"
    "Write a Python function that returns the larger of two integers."
    "<|im_end|>"
)
print(model.generate(prompt, max_length=256))
```

HRM-Text is a PrefixLM base model, not a ChatML/Qwen chat model. Keep the
`direct` condition and the `<|im_end|>` instruction boundary at inference.

## Limitations and intended use

This is a research artifact for continued evaluation of code generation and a
fixed tool-transcript protocol. It does not itself execute tools, validate tool
calls, sandbox generated code, or establish benchmark performance. Use
independent task-level evaluation before deployment.

## Provenance

The base model is Apache-2.0. Stage A training data is CC-BY-4.0; source pins,
dataset checksums, serializer details, preflight configuration, and completed
telemetry are included in this repository's `training/` artifacts.