Claude Opus 4.6
claude-opus
High-end Claude for difficult coding, planning, and slower expert reasoning
ReasoningTool CallingAttachments
Context Window
1M
Max Output
128K
Temperature
Yes
Open Weights
No
Knowledge Cutoff
2025-05-31
Released
2026-02-05
Last Updated
2026-03-13
Modalities
Input:TextImagePDF
→Output:Text
Benchmarks
| Benchmark | Score | Metric | Harness |
|---|---|---|---|
| SWE-Bench Pro | 51.9 | resolve rate | - |
| SWE-Atlas Codebase QnA | 33.3 | score | Claude Code |
| SWE-Atlas Codebase QnA | 30 | score | Mini-SWE-Agent |
| SWE-Atlas Refactoring | 35.58 | score | Claude Code |
| SWE-Atlas Test Writing | 36.67 | score | Claude Code |
| SWE-Atlas Test Writing | 36.08 | score | Mini-SWE-Agent |
| Artificial Analysis Coding Agent Index | 51.3 | average pass@1 | Claude Code |
| SWE-Atlas Codebase QnA | 71.9 | pass@1 | Claude Code |
| SWE-Bench Pro | 11.8 | pass@1 | Claude Code |
| Terminal-Bench | 70.2 | pass@1 | Claude Code |
Available Providers (6)
| Provider | Input /1M | Output /1M | Cache Read /1M | Cache Write /1M | Reasoning | Status |
|---|---|---|---|---|---|---|
| Rp 90.169 | Rp 450.843 | Rp 9.017 | Rp 112.711 | effort, budget_tokens | — | |
| — | — | — | — | toggle, effort, budget_tokens | Experimental | |
| Rp 90.169 | Rp 450.843 | Rp 9.017 | Rp 112.711 | toggle, effort, budget_tokens | Experimental | |
| Rp 90.169 | Rp 450.843 | Rp 9.017 | Rp 112.711 | toggle, budget_tokens | — | |
| Rp 90.169 | Rp 450.843 | Rp 9.017 | Rp 112.711 | effort | — | |
| Rp 90.169 | Rp 450.843 | Rp 9.017 | — | effort | — |