OLMo 2 1.5B on GPQA Diamond: score, rank and what it means
OLMo 2 1.5B scores 40.7 on GPQA Diamond, placing it #582 of 600 models in the index. The benchmark average is 65.6 and the leader is GPT-5.2 Reasoning at 87.0.
Score distribution
The chart shows the top 10 models on GPQA Diamond, with OLMo 2 1.5B highlighted. Longer bars mean higher scores.
Top 10 leaderboard
| # | Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|---|
| 1 | GPT-5.2 Reasoning | OpenAI | 1000000 | $20.98 | 87.5 |
| 2 | GPT-5.1 Max | OpenAI | 2000000 | $20.50 | 87.9 |
| 3 | Claude Opus 4.5 Pro | Anthropic | 200000 | $20.98 | 89.1 |
| 4 | GPT-5.1 Reasoning | OpenAI | 400000 | $20.27 | 88.3 |
| 5 | Claude Sonnet 4.5 Reasoning | Anthropic | 400000 | $19.48 | 87.7 |
| 6 | GPT-5.2 | OpenAI | 2000000 | $19.71 | 88.0 |
| 7 | o4 Turbo | OpenAI | 2000000 | $19.34 | 86.6 |
| 8 | Claude Opus 4.5 Max | Anthropic | 1000000 | $20.90 | 87.8 |
| 9 | Grok 4 Turbo | xAI | 1000000 | $19.21 | 86.7 |
| 10 | Claude Sonnet 4.5 Max | Anthropic | 1000000 | $19.90 | 87.2 |
What this score means
On GPQA Diamond, OLMo 2 1.5B sits at #582 of 600. The leader, GPT-5.2 Reasoning, scores 87.0, so the gap to the top is 46.3 points. The median model in this index scores 68.8, which puts OLMo 2 1.5B below the midpoint.
Allen Institute for AI models average 55.6 on this benchmark. OLMo 2 1.5B is 14.9 points below that provider line, so it is a weaker result than the average Allen Institute for AI model.
Among small open-weight models, the average is 49.3. OLMo 2 1.5B is 8.6 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 40.7 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 $0.28 per million input tokens, OLMo 2 1.5B is below the median input price of $4.00 across the 600 models scored on GPQA Diamond. 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 |
|---|---|---|---|---|
| SmolLM3 7B | Hugging Face | 16384 | $0.19 | 44.3 |
| GPT-NeoX 8B | EleutherAI | 16384 | $0.25 | 43.7 |
| Nemotron Nano 7B | NVIDIA | 8192 | $0.35 | 47.5 |
| Nemotron Nano 8B | NVIDIA | 8192 | $0.46 | 48.1 |
| OLMo 2 1.5B | Allen Institute for AI | 16384 | $0.28 | 44.0 |
| StableLM 2 7B | Stability AI | 8192 | $0.28 | 44.3 |
| StableLM 2 8B | Stability AI | 32768 | $0.38 | 47.0 |
Other benchmarks for OLMo 2 1.5B
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 51.2 | 588 | 2th | |
| SWE-bench Verified | 26.3 | 592 | 1th | |
| HumanEval | 48.3 | 584 | 3th | |
| MATH-500 | 41.9 | 591 | 2th | |
| AIME 2025 | 29.2 | 585 | 3th | |
| LiveCodeBench | 29.4 | 584 | 3th | |
| IFEval | 55.4 | 591 | 2th | |
| TruthfulQA | 50.5 | 590 | 2th | |
| HellaSwag | 64.3 | 588 | 2th | |
| MMMU | 46.4 | 577 | 4th | |
| Arena Elo | 1142.8 | 586 | 2th |
FAQ
What score does OLMo 2 1.5B get on GPQA Diamond?
OLMo 2 1.5B scores 40.7 on GPQA Diamond in this index. The benchmark average is 65.6 and the top score is 87.0.
How does OLMo 2 1.5B rank on GPQA Diamond?
It ranks #582 of 600 models, in the 3rd percentile. The leader is GPT-5.2 Reasoning at 87.0.
Is OLMo 2 1.5B good at GPQA Diamond?
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 GPQA Diamond score calculated?
GPQA Diamond is a reasoning 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 OLMo 2 1.5B cost?
OLMo 2 1.5B costs $0.28 per million input tokens and $1.41 per million output tokens.