Best models on GPQA Diamond in 2026
GPQA Diamond leaderboard data from the index. Graduate-level questions in physics, chemistry and biology, written to resist search shortcuts. The top score is 87.0 and the average is 65.6.
What the data shows
GPT-5.2 Reasoning leads at 87.0. The gap to the average is 21.4 points, and the gap to the 10th-ranked model is 2.6 points.
The median score is 68.8. Models above that line are in the upper half of the index for this benchmark.
How to read the ranking
- Use the score to shortlist, not to declare a winner.
- Check price and context for the top candidates.
- Read the benchmark methodology before quoting a score.
- Pair this benchmark with a task-specific evaluation.
Top 20 on GPQA Diamond
| # | Model | Provider | Score | Input / 1M | Context |
|---|---|---|---|---|---|
| 1 | GPT-5.2 Reasoning | OpenAI | 87.0 | $20.98 | 1,000,000 |
| 2 | GPT-5.1 Max | OpenAI | 86.4 | $20.50 | 2,000,000 |
| 3 | Claude Opus 4.5 Pro | Anthropic | 86.0 | $20.98 | 200,000 |
| 4 | GPT-5.1 Reasoning | OpenAI | 85.6 | $20.27 | 400,000 |
| 5 | Claude Sonnet 4.5 Reasoning | Anthropic | 85.2 | $19.48 | 400,000 |
| 6 | GPT-5.2 | OpenAI | 84.9 | $19.71 | 2,000,000 |
| 7 | o4 Turbo | OpenAI | 84.8 | $19.34 | 2,000,000 |
| 8 | Claude Opus 4.5 Max | Anthropic | 84.6 | $20.90 | 1,000,000 |
| 9 | Grok 4 Turbo | xAI | 84.5 | $19.21 | 1,000,000 |
| 10 | Claude Sonnet 4.5 Max | Anthropic | 84.4 | $19.90 | 1,000,000 |
| 11 | GPT-5.2 Turbo | OpenAI | 84.0 | $20.73 | 1,000,000 |
| 12 | o4 Reasoning | OpenAI | 84.0 | $19.69 | 1,000,000 |
| 13 | Gemini 3 Pro Reasoning | Google DeepMind | 83.9 | $19.69 | 200,000 |
| 14 | Qwen3-Max Max | Alibaba Cloud | 83.8 | $18.53 | 400,000 |
| 15 | Claude Sonnet 4.5 Turbo | Anthropic | 83.7 | $18.37 | 1,000,000 |
| 16 | GPT-5.1 Pro | OpenAI | 83.4 | $19.77 | 200,000 |
| 17 | GPT-5.2 Max | OpenAI | 83.4 | $21.39 | 1,000,000 |
| 18 | GPT-5.2 Pro | OpenAI | 83.2 | $21.32 | 2,000,000 |
| 19 | Claude Sonnet 4.5 Pro | Anthropic | 83.1 | $18.73 | 1,000,000 |
| 20 | o3 Max | OpenAI | 82.7 | $17.82 | 2,000,000 |
Methodology
This story uses the AI & LLM Index dataset: 600 models, 40 providers and 12 benchmarks. Prices are listed per million tokens. Scores are modelled estimates on a 0–100 scale and are not official benchmark results. Figures are rounded for readability.
Related
FAQ
What does the Best models on GPQA Diamond in 2026 data show?
GPQA Diamond leaderboard data from the index. Graduate-level questions in physics, chemistry and biology, written to resist search shortcuts. The top score is 87.0 and the average is 65.6.
Are the numbers official?
No. Prices and scores are compiled for this demo index. Benchmark values are modelled estimates, not official results. Verify figures with the provider or benchmark owner before making decisions.
How should I use this ranking?
Use it to form a shortlist. Check the specific model pages, compare price and context, and test the shortlist on your own examples before committing.