Claude 4.7 Opus vs o3
Direct spec comparison of Claude 4.7 Opus (from Anthropic) and o3 (from OpenAI). Want a 3- or 4-way comparison? Open the multi-model tool →
 Claude 4.7 OpusAnthropic |  o3OpenAI | |
|---|---|---|
| Vendor | Anthropic | OpenAI |
| Family | Claude | o-series |
| Release date | 2026-04-16 | 2025-04-16 |
| Context window | 1,000,000 tokens | 200,000 tokens |
| Parameters | — | — |
| Modality | text, vision | text, vision |
| License | proprietary | proprietary |
| Source | proprietary | proprietary |
| Description | Anthropic's previous Opus flagship — superseded by Opus 4.8 on May 28, 2026 (42-day cycle). Optimized for complex reasoning and coding. Improved software engineering, long-running coding tasks, and higher-resolution vision over Claude 4.6. | Reasoning-focused model in the o-series. |
| Links | ||
| Benchmarks | ||
| MMLU-Pro | 88.2% | — |
| GPQA-D | 90.1% | 87.7% |
| HumanEval | 97.4% | — |
| Aider | 91.2% | — |
| AIME-25 | 93.5% | 88.9% |
| LiveCB | 80.2% | — |
| MMMU | 79.0% | — |
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