Side-by-side comparison of AI model specs, benchmarks, and pricing.
| Spec | Claude Opus 4.6 Anthropic | o3 OpenAI |
|---|---|---|
| Tier | frontier | frontier |
| Release Date | 2026-02-05 | 2025-04-16 |
| Context Window | 200K | 200K |
| Max Output | 128K | 100K |
| Input Price (/1M) | $5 | $2 |
| Output Price (/1M) | $25 | $8 |
| Arena Elo | 1,496 | 1,433 |
| MMLU | 92.5% | 89.4% |
| GPQA | 91.3% | 79.7% |
| MATH | 97.6% | 91.6% |
| HumanEval | 97% | 92.8% |
| SWE-bench | 72.5% | 71.7% |
| Capabilities | vision, tool-use, code, extended-thinking, agentic | vision, tool-use, code, reasoning |