GPT-NeoX 8B on AIME 2025: score, rank and what it means
GPT-NeoX 8B scores 25.2 on AIME 2025, placing it #594 of 600 models in the index. The benchmark average is 63.6 and the leader is Claude Opus 4.5 Pro at 91.4.
Score distribution
The chart shows the top 10 models on AIME 2025, with GPT-NeoX 8B highlighted. Longer bars mean higher scores.
Top 10 leaderboard
| # | Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|---|
| 1 | Claude Opus 4.5 Pro | Anthropic | 200000 | $20.98 | 89.1 |
| 2 | GPT-5.2 Pro | OpenAI | 2000000 | $21.32 | 89.6 |
| 3 | GPT-5.1 Pro | OpenAI | 200000 | $19.77 | 87.8 |
| 4 | GPT-5.2 | OpenAI | 2000000 | $19.71 | 88.0 |
| 5 | o4 Reasoning | OpenAI | 1000000 | $19.69 | 87.5 |
| 6 | o4 Pro | OpenAI | 1000000 | $19.37 | 87.3 |
| 7 | Claude Opus 4.5 | Anthropic | 400000 | $19.42 | 87.7 |
| 8 | Gemini 3 Pro Max | Google DeepMind | 2000000 | $20.57 | 87.9 |
| 9 | Claude Opus 4.5 Max | Anthropic | 1000000 | $20.90 | 87.8 |
| 10 | Claude Opus 4.5 Reasoning | Anthropic | 2000000 | $20.91 | 88.2 |
What this score means
On AIME 2025, GPT-NeoX 8B sits at #594 of 600. The leader, Claude Opus 4.5 Pro, scores 91.4, so the gap to the top is 66.2 points. The median model in this index scores 67.6, which puts GPT-NeoX 8B below the midpoint.
EleutherAI models average 39.0 on this benchmark. GPT-NeoX 8B is 13.8 points below that provider line, so it is a weaker result than the average EleutherAI model.
Among small open-weight models, the average is 41.6. GPT-NeoX 8B is 16.4 points below that group. This is the more useful comparison if you are shortlisting within the same tier rather than across the whole index.
Read a 25.2 as a relative signal, not an absolute guarantee. Benchmark scores depend on prompt format, evaluation harness and contamination controls. Use this page to narrow the shortlist, then test the model on your own data.
Price context
At $0.25 per million input tokens, GPT-NeoX 8B is below the median input price of $4.00 across the 600 models scored on AIME 2025. The models immediately around it in the ranking are shown below so you can compare score and price together.
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Zephyr 8B | Hugging Face | 8192 | $0.22 | 43.0 |
| SmolLM3 8B | Hugging Face | 32768 | $0.21 | 44.0 |
| Nemotron Nano 1.5B | NVIDIA | 8192 | $0.10 | 41.5 |
| Zephyr 7B | Hugging Face | 32768 | $0.23 | 42.5 |
| GPT-NeoX 8B | EleutherAI | 16384 | $0.25 | 43.7 |
| StableLM 2 1.5B | Stability AI | 16384 | $0.13 | 38.3 |
| Pythia 7B | EleutherAI | 8192 | $0.10 | 40.7 |
Other benchmarks for GPT-NeoX 8B
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 53.5 | 578 | 4th | |
| GPQA Diamond | 41.7 | 579 | 4th | |
| SWE-bench Verified | 28.4 | 583 | 3th | |
| HumanEval | 44.9 | 590 | 2th | |
| MATH-500 | 41.9 | 590 | 2th | |
| LiveCodeBench | 28.9 | 585 | 3th | |
| IFEval | 56.4 | 588 | 2th | |
| TruthfulQA | 53.3 | 583 | 3th | |
| HellaSwag | 62.9 | 592 | 1th | |
| MMMU | 43.2 | 585 | 3th | |
| Arena Elo | 1154.9 | 583 | 3th |
FAQ
What score does GPT-NeoX 8B get on AIME 2025?
GPT-NeoX 8B scores 25.2 on AIME 2025 in this index. The benchmark average is 63.6 and the top score is 91.4.
How does GPT-NeoX 8B rank on AIME 2025?
It ranks #594 of 600 models, in the 1st percentile. The leader is Claude Opus 4.5 Pro at 91.4.
Is GPT-NeoX 8B good at AIME 2025?
It is below the median for this benchmark, so test it carefully before relying on it for this capability. The result should be read alongside its price and context window.
How is the AIME 2025 score calculated?
AIME 2025 is a mathematics benchmark. Scores in this index are modelled estimates on a 0–100 scale (or Elo for Arena), derived from capability tier and benchmark difficulty. They are not official leaderboard results.
What does GPT-NeoX 8B cost?
GPT-NeoX 8B costs $0.25 per million input tokens and $1.04 per million output tokens.