Instructions to use N8Programs/NextTerm-2-50M with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use N8Programs/NextTerm-2-50M with Transformers:

# Use a pipeline as a high-level helper
from transformers import pipeline

pipe = pipeline("text-generation", model="N8Programs/NextTerm-2-50M")

# pip install -U transformers accelerate
# Load model directly
from transformers import AutoTokenizer, AutoModelForCausalLM

tokenizer = AutoTokenizer.from_pretrained("N8Programs/NextTerm-2-50M")
model = AutoModelForCausalLM.from_pretrained("N8Programs/NextTerm-2-50M", device_map="auto")

MLX

How to use N8Programs/NextTerm-2-50M with MLX:

# Make sure mlx-lm is installed
# pip install --upgrade mlx-lm
# if on a CUDA device, also pip install mlx[cuda]

# Generate text with mlx-lm
from mlx_lm import load, generate

model, tokenizer = load("N8Programs/NextTerm-2-50M")

prompt = "Once upon a time in"
text = generate(model, tokenizer, prompt=prompt, verbose=True)

Notebooks
Google Colab
Kaggle
Local Apps Settings
LM Studio

vLLM

How to use N8Programs/NextTerm-2-50M with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "N8Programs/NextTerm-2-50M"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "N8Programs/NextTerm-2-50M",
		"prompt": "Once upon a time,",
		"max_tokens": 512,
		"temperature": 0.5
	}'

Use Docker

docker model run hf.co/N8Programs/NextTerm-2-50M

SGLang

How to use N8Programs/NextTerm-2-50M with SGLang:

Install from pip and serve model

# Install SGLang from pip:
pip install sglang
# Start the SGLang server:
python3 -m sglang.launch_server \
    --model-path "N8Programs/NextTerm-2-50M" \
    --host 0.0.0.0 \
    --port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "N8Programs/NextTerm-2-50M",
		"prompt": "Once upon a time,",
		"max_tokens": 512,
		"temperature": 0.5
	}'

Use Docker images

docker run --gpus all \
    --shm-size 32g \
    -p 30000:30000 \
    -v ~/.cache/huggingface:/root/.cache/huggingface \
    --env "HF_TOKEN=<secret>" \
    --ipc=host \
    lmsysorg/sglang:latest \
    python3 -m sglang.launch_server \
        --model-path "N8Programs/NextTerm-2-50M" \
        --host 0.0.0.0 \
        --port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "N8Programs/NextTerm-2-50M",
		"prompt": "Once upon a time,",
		"max_tokens": 512,
		"temperature": 0.5
	}'

MLX LM

How to use N8Programs/NextTerm-2-50M with MLX LM:

Generate or start a chat session

# Install MLX LM
uv tool install mlx-lm
# Generate some text
mlx_lm.generate --model "N8Programs/NextTerm-2-50M" --prompt "Once upon a time"

Docker Model Runner
How to use N8Programs/NextTerm-2-50M with Docker Model Runner:
```
docker model run hf.co/N8Programs/NextTerm-2-50M
```
Atomic Chat

NextTerm-2-50M / README.md

N8Programs

NextTerm-2-50M: bf16 weights, model card, eval scripts and data

2405121 verified 15 days ago

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---
license: cc-by-sa-4.0
library_name: transformers
pipeline_tag: text-generation
tags:
- oeis
- integer-sequences
- qwen3
- causal-lm
- mlx
datasets:
- N8Programs/oeis-ladder-10b
---
# NextTerm-2-50M

(Model Card Co-Written w/ Opus 5.5)

[![Benchmark radar](radar_chart.png)](radar_chart.png)

## Model Summary

NextTerm-2-50M is a 51M parameter causal transformer trained to continue integer
sequences. It is the middle model in the NextTerm-2 series (5M, 50M and 440M), three
models trained on the same 10B tokens with identical hyperparameters for controlled comparison. It uses the Qwen3 architecture with a byte-level
vocabulary: the 256 byte values plus BOS, EOS and PAD.

The training corpus, [N8Programs/oeis-ladder-10b](https://huggingface.co/datasets/N8Programs/oeis-ladder-10b),
contains every training-split OEIS sequence once (terms from its b-file, up to 4,096
bytes) plus 9.2B tokens of distinct, synthetically transformed copies of OEIS sequences.

Compared with NextTerm-47M, a model of similar size, NextTerm-2-50M is better on every
benchmark below except Ryskina & Knight (66.67% vs 70.18%). The largest gains are on
polynomial continuation: +27 points on cubics and +33 on quartics.

The model reads integer sequences formatted as comma-separated values, with a trailing
comma, for example:

```text
1,-2,3,-4,
```

Training data contained only digits, commas and `-`, with no spaces and no leading
zeros. Other characters are accepted by the byte-level tokenizer but are out of
distribution, so format prompts exactly as above.

## Training Details

| Field | Value |
| --- | --- |
| Parameters | 50,617,856 |
| Architecture | Qwen3-style causal LM |
| Layers | 16 |
| Hidden size | 512 |
| FFN size | 1536 |
| Attention heads | 4 (head dim 128) |
| KV heads | 2 |
| Vocabulary size | 259 (256 bytes + BOS/EOS/PAD) |
| Training tokens | 9,999,999,999 (one epoch) |
| Sequence length cap | 4,096 bytes per sequence |
| Batch mode | Whole-document packing, 98,304 token positions per step (97% filled), no cross-document attention |
| Steps | 105,029 |
| Optimizer | Muon/AdamW hybrid with μP width scaling |
| LR schedule | Linear warmup over 2% of steps to `2e-3` for Muon, `5e-4` for AdamW, cosine decay to 0.1x |
| AdamW | β = (0.9, 0.99), weight decay 0.01 |
| Training hardware | 2× NVIDIA DGX Spark (GB10), data parallel, bf16 |
| Training time | 14 hours 38 minutes |
| Export dtype | bfloat16 |

Muon was used for 2D weight matrices and AdamW for embeddings, norm gains and the output
head. All three NextTerm-2 models share these settings.

## Evaluation Results

### Main Benchmarks

| Model | OEIS-Eval-Neo | Ryskina & Knight | M1 Competition 111 MAPE |
| --- | ---: | ---: | ---: |
| NextTerm-2-440M | **36.25%** | 66.67% | **17.1105** |
| **NextTerm-2-50M** | 31.56% | 66.67% | 18.3615 |
| NextTerm-2-5M | 23.38% | 42.11% | 20.8527 |
| NextTerm-440M | 34.43% | 52.63% | 17.6239 |
| NextTerm-47M | 29.49% | **70.18%** | 18.7621 |
| Qwen3-0.6B | 18.44% | 33.33% | 22.7984 |
| Qwen3-1.7B | 20.77% | 49.12% | 22.2411 |
| Qwen3-4B | 23.74% | 63.16% | 19.1731 |
| Qwen3-8B | 24.62% | 57.89% | 18.4027 |
| Qwen3-14B | 26.00% | 59.65% | 17.9837 |

OEIS-Eval-Neo is a held-out OEIS next-term evaluation (19,034 sequences). M1 Competition
111 reports macro MAPE, where lower is better; the Naive2 forecasting baseline scores
17.7987. Ryskina & Knight (2021) is a 57-sequence next-term benchmark based on
psychometrics and puzzles. NextTerm-47M remains ahead there, consistent with its strength
on very short prompts.


### Polynomial Continuation

The polynomial continuation evaluation samples integer sequences from
polynomials of degree 1 through 4 and asks for the next term. Accuracy is exact
match across 200 samples for each prompt length `k`.

| Model | Arithmetic | Quadratic | Cubic | Quartic |
| --- | ---: | ---: | ---: | ---: |
| NextTerm-2-440M | 96.15% | **94.39%** | **88.70%** | **83.74%** |
| **NextTerm-2-50M** | **96.31%** | 84.11% | 63.95% | 47.86% |
| NextTerm-2-5M | 78.21% | 23.87% | 1.89% | 0.50% |
| NextTerm-440M | 94.38% | 86.39% | 75.20% | 67.83% |
| NextTerm-47M | 94.15% | 81.07% | 37.43% | 15.17% |
| Qwen3-0.6B | 90.31% | 8.72% | 0.30% | 0.02% |
| Qwen3-1.7B | 93.10% | 41.57% | 5.36% | 0.71% |
| Qwen3-4B | 93.90% | 77.26% | 28.18% | 5.98% |
| Qwen3-8B | 96.10% | 80.59% | 32.93% | 7.95% |
| Qwen3-14B | 95.60% | 84.61% | 49.16% | 14.98% |

## Usage

### MLX

```bash
mlx_lm.generate --model N8Programs/NextTerm-2-50M --prompt "1,2,3,"
```

### Hugging Face Transformers

```python
import torch
from transformers import AutoModelForCausalLM, AutoTokenizer
model_name = "N8Programs/NextTerm-2-50M"
tokenizer = AutoTokenizer.from_pretrained(model_name)
model = AutoModelForCausalLM.from_pretrained(
    model_name,
    dtype=torch.bfloat16,
    device_map="auto",
)
prompt = "1,2,3,4,5,"
inputs = tokenizer(prompt, return_tensors="pt").to(model.device)
outputs = model.generate(
    **inputs,
    max_new_tokens=64,
    do_sample=False,
    eos_token_id=[tokenizer.convert_tokens_to_ids(","), tokenizer.eos_token_id],
    pad_token_id=tokenizer.pad_token_id,
)
print(tokenizer.decode(outputs[0], skip_special_tokens=True))
```

For strict next-term evaluation, stop generation on *comma or EOS* and parse the
text before the first comma as the predicted integer. The tokenizer adds BOS
automatically.

## Reproducibility

This repository contains the evaluation scripts and data used for the results above:

- `eval_neo.py` for OEIS-Eval-Neo (and the polynomial sets).
- `gen_poly_evals.py` to regenerate the arithmetic/quadratic/cubic/quartic sets.
- `eval_m1.py` for M1 Competition 111 MAPE.
- `eval_ryskina.py` for Ryskina & Knight.
- `oeis_val_neo.jsonl`, `m1_competition_111.jsonl` and `ryskina_knight_57.jsonl`.
- `eval_results.txt` for the compact result table.

The model was trained with [spark-gpt](https://github.com/N8python/spark-gpt) on the
[N8Programs/oeis-ladder-10b](https://huggingface.co/datasets/N8Programs/oeis-ladder-10b)
dataset, whose card documents the data recipe in full.

## Citation

```bibtex
@misc{nextterm2_2026,
  author       = {Nathan Breslow and Opus 5.5},
  title        = {NextTerm-2: A Scaling Ladder of Pretrained Transformers for Integer Sequence Prediction},
  year         = {2026},
  publisher    = {Hugging Face},
  howpublished = {\url{https://huggingface.co/N8Programs/NextTerm-2-50M}},
  note         = {51M parameter model trained on 10B tokens of augmented OEIS data}
}
```

## Attribution

This model was trained on data from the
**On-Line Encyclopedia of Integer Sequences (OEIS)**.

- Source: https://oeis.org/
- License: Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0)
- OEIS End-User License Agreement: https://oeis.org/wiki/The_OEIS_End-User_License_Agreement

	---
	license: cc-by-sa-4.0
	library_name: transformers
	pipeline_tag: text-generation
	tags:
	- oeis
	- integer-sequences
	- qwen3
	- causal-lm
	- mlx
	datasets:
	- N8Programs/oeis-ladder-10b
	---

	# NextTerm-2-50M

	(Model Card Co-Written w/ Opus 5.5)

	[![Benchmark radar](radar_chart.png)](radar_chart.png)

	## Model Summary

	NextTerm-2-50M is a 51M parameter causal transformer trained to continue integer
	sequences. It is the middle model in the NextTerm-2 series (5M, 50M and 440M), three
	models trained on the same 10B tokens with identical hyperparameters for controlled comparison. It uses the Qwen3 architecture with a byte-level
	vocabulary: the 256 byte values plus BOS, EOS and PAD.

	The training corpus, [N8Programs/oeis-ladder-10b](https://huggingface.co/datasets/N8Programs/oeis-ladder-10b),
	contains every training-split OEIS sequence once (terms from its b-file, up to 4,096
	bytes) plus 9.2B tokens of distinct, synthetically transformed copies of OEIS sequences.

	Compared with NextTerm-47M, a model of similar size, NextTerm-2-50M is better on every
	benchmark below except Ryskina & Knight (66.67% vs 70.18%). The largest gains are on
	polynomial continuation: +27 points on cubics and +33 on quartics.

	The model reads integer sequences formatted as comma-separated values, with a trailing
	comma, for example:

	```text
	1,-2,3,-4,
	```

	Training data contained only digits, commas and `-`, with no spaces and no leading
	zeros. Other characters are accepted by the byte-level tokenizer but are out of
	distribution, so format prompts exactly as above.

	## Training Details

	\| Field \| Value \|
	\| --- \| --- \|
	\| Parameters \| 50,617,856 \|
	\| Architecture \| Qwen3-style causal LM \|
	\| Layers \| 16 \|
	\| Hidden size \| 512 \|
	\| FFN size \| 1536 \|
	\| Attention heads \| 4 (head dim 128) \|
	\| KV heads \| 2 \|
	\| Vocabulary size \| 259 (256 bytes + BOS/EOS/PAD) \|
	\| Training tokens \| 9,999,999,999 (one epoch) \|
	\| Sequence length cap \| 4,096 bytes per sequence \|
	\| Batch mode \| Whole-document packing, 98,304 token positions per step (97% filled), no cross-document attention \|
	\| Steps \| 105,029 \|
	\| Optimizer \| Muon/AdamW hybrid with μP width scaling \|
	\| LR schedule \| Linear warmup over 2% of steps to `2e-3` for Muon, `5e-4` for AdamW, cosine decay to 0.1x \|
	\| AdamW \| β = (0.9, 0.99), weight decay 0.01 \|
	\| Training hardware \| 2× NVIDIA DGX Spark (GB10), data parallel, bf16 \|
	\| Training time \| 14 hours 38 minutes \|
	\| Export dtype \| bfloat16 \|

	Muon was used for 2D weight matrices and AdamW for embeddings, norm gains and the output
	head. All three NextTerm-2 models share these settings.

	## Evaluation Results

	### Main Benchmarks

	\| Model \| OEIS-Eval-Neo \| Ryskina & Knight \| M1 Competition 111 MAPE \|
	\| --- \| ---: \| ---: \| ---: \|
	\| NextTerm-2-440M \| 36.25% \| 66.67% \| 17.1105 \|
	\| NextTerm-2-50M \| 31.56% \| 66.67% \| 18.3615 \|
	\| NextTerm-2-5M \| 23.38% \| 42.11% \| 20.8527 \|
	\| NextTerm-440M \| 34.43% \| 52.63% \| 17.6239 \|
	\| NextTerm-47M \| 29.49% \| 70.18% \| 18.7621 \|
	\| Qwen3-0.6B \| 18.44% \| 33.33% \| 22.7984 \|
	\| Qwen3-1.7B \| 20.77% \| 49.12% \| 22.2411 \|
	\| Qwen3-4B \| 23.74% \| 63.16% \| 19.1731 \|
	\| Qwen3-8B \| 24.62% \| 57.89% \| 18.4027 \|
	\| Qwen3-14B \| 26.00% \| 59.65% \| 17.9837 \|

	OEIS-Eval-Neo is a held-out OEIS next-term evaluation (19,034 sequences). M1 Competition
	111 reports macro MAPE, where lower is better; the Naive2 forecasting baseline scores
	17.7987. Ryskina & Knight (2021) is a 57-sequence next-term benchmark based on
	psychometrics and puzzles. NextTerm-47M remains ahead there, consistent with its strength
	on very short prompts.


	### Polynomial Continuation

	The polynomial continuation evaluation samples integer sequences from
	polynomials of degree 1 through 4 and asks for the next term. Accuracy is exact
	match across 200 samples for each prompt length `k`.

	\| Model \| Arithmetic \| Quadratic \| Cubic \| Quartic \|
	\| --- \| ---: \| ---: \| ---: \| ---: \|
	\| NextTerm-2-440M \| 96.15% \| 94.39% \| 88.70% \| 83.74% \|
	\| NextTerm-2-50M \| 96.31% \| 84.11% \| 63.95% \| 47.86% \|
	\| NextTerm-2-5M \| 78.21% \| 23.87% \| 1.89% \| 0.50% \|
	\| NextTerm-440M \| 94.38% \| 86.39% \| 75.20% \| 67.83% \|
	\| NextTerm-47M \| 94.15% \| 81.07% \| 37.43% \| 15.17% \|
	\| Qwen3-0.6B \| 90.31% \| 8.72% \| 0.30% \| 0.02% \|
	\| Qwen3-1.7B \| 93.10% \| 41.57% \| 5.36% \| 0.71% \|
	\| Qwen3-4B \| 93.90% \| 77.26% \| 28.18% \| 5.98% \|
	\| Qwen3-8B \| 96.10% \| 80.59% \| 32.93% \| 7.95% \|
	\| Qwen3-14B \| 95.60% \| 84.61% \| 49.16% \| 14.98% \|

	## Usage

	### MLX

	```bash
	mlx_lm.generate --model N8Programs/NextTerm-2-50M --prompt "1,2,3,"
	```

	### Hugging Face Transformers

	```python
	import torch
	from transformers import AutoModelForCausalLM, AutoTokenizer

	model_name = "N8Programs/NextTerm-2-50M"
	tokenizer = AutoTokenizer.from_pretrained(model_name)
	model = AutoModelForCausalLM.from_pretrained(
	model_name,
	dtype=torch.bfloat16,
	device_map="auto",
	)

	prompt = "1,2,3,4,5,"
	inputs = tokenizer(prompt, return_tensors="pt").to(model.device)

	outputs = model.generate(
	**inputs,
	max_new_tokens=64,
	do_sample=False,
	eos_token_id=[tokenizer.convert_tokens_to_ids(","), tokenizer.eos_token_id],
	pad_token_id=tokenizer.pad_token_id,
	)

	print(tokenizer.decode(outputs[0], skip_special_tokens=True))
	```

	For strict next-term evaluation, stop generation on comma or EOS and parse the
	text before the first comma as the predicted integer. The tokenizer adds BOS
	automatically.

	## Reproducibility

	This repository contains the evaluation scripts and data used for the results above:

	- `eval_neo.py` for OEIS-Eval-Neo (and the polynomial sets).
	- `gen_poly_evals.py` to regenerate the arithmetic/quadratic/cubic/quartic sets.
	- `eval_m1.py` for M1 Competition 111 MAPE.
	- `eval_ryskina.py` for Ryskina & Knight.
	- `oeis_val_neo.jsonl`, `m1_competition_111.jsonl` and `ryskina_knight_57.jsonl`.
	- `eval_results.txt` for the compact result table.

	The model was trained with [spark-gpt](https://github.com/N8python/spark-gpt) on the
	[N8Programs/oeis-ladder-10b](https://huggingface.co/datasets/N8Programs/oeis-ladder-10b)
	dataset, whose card documents the data recipe in full.

	## Citation

	```bibtex
	@misc{nextterm2_2026,
	author = {Nathan Breslow and Opus 5.5},
	title = {NextTerm-2: A Scaling Ladder of Pretrained Transformers for Integer Sequence Prediction},
	year = {2026},
	publisher = {Hugging Face},
	howpublished = {\url{https://huggingface.co/N8Programs/NextTerm-2-50M}},
	note = {51M parameter model trained on 10B tokens of augmented OEIS data}
	}
	```

	## Attribution

	This model was trained on data from the
	On-Line Encyclopedia of Integer Sequences (OEIS).

	- Source: https://oeis.org/
	- License: Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0)
	- OEIS End-User License Agreement: https://oeis.org/wiki/The_OEIS_End-User_License_Agreement