Claude Opus 5.5
Released Sep 2026 · knowledge cutoff Jun 2026. Proprietary, available through the provider's API.
Claude Opus 5.5 is built by Anthropic and has 31 benchmark results tracked in the public leaderboard. It supports multimodal input, with a context window of 1M tokens. At the blended 8:1 input-to-output rate, it costs $5.78 per million tokens and delivers about 9.3 tokens per second.
Where Claude Opus 5.5 ranks
The chart below ranks every model in the comparison by overall capability, which is the average of a model's scores across the eight workload axes. Claude Opus 5.5 is the red bar. This is the single number to check first: it tells you where the model sits in the current pecking order before you dig into the detail.
Workload strengths
Each row below is the average normalized score across every benchmark tagged with that workload category. A higher number means the model performs better on that kind of task relative to the maximum possible score on those benchmarks. Categories where the model has no published results are shown as n/a.
| Workload | Index (0–1) |
|---|---|
| Reasoning | 74% |
| Coding | 73% |
| Agents | 63% |
| Math | 74% |
| Vision | 80% |
| Long Context | n/a |
| Writing | 61% |
| Knowledge | 77% |
How Claude Opus 5.5 stacks up against every other model
Below is every head-to-head comparison involving Claude Opus 5.5. Each card shows the win/loss tally across all workload axes and headline benchmarks. Tap any matchup for the full breakdown with per-benchmark scores, pricing, and workload recommendations.
Claude Opus 5.5vs DeepSeek-V4.1-Flash
Claude Opus 5.5 leads 5–3
Claude Opus 5.5vs GPT-6 Astra
GPT-6 Astra leads 7–3
Claude Opus 5.5vs DeepSeek-V4.1-Flash
Claude Opus 5.5 leads 5–3
Claude Opus 5.5vs GPT-6 Astra
GPT-6 Astra leads 7–3
Claude Opus 5.5vs Claude Sonnet 5.5
Claude Opus 5.5 leads 5–2
Claude Opus 5.5vs MiMo-V2.6-Flash
Claude Opus 5.5 leads 6–1
Claude Opus 5.5vs Atria Dawn Preview
Claude Opus 5.5 leads 5–3
Claude Opus 5.5vs Grok 4.7
Claude Opus 5.5 leads 7–0
Claude Opus 5.5vs GPT-Live-1
Claude Opus 5.5 leads 7–0
Claude Opus 5.5vs MiMo-V2.6-Pro
Claude Opus 5.5 leads 6–1
Claude Opus 5.5vs Gemini 3.8 Flash
Claude Opus 5.5 leads 7–1
Claude Opus 5.5vs Claude Sonnet 5.5
Claude Opus 5.5 leads 5–2
Claude Opus 5.5vs MiMo-V2.6-Flash
Claude Opus 5.5 leads 6–1
Claude Opus 5.5vs Atria Dawn Preview
Claude Opus 5.5 leads 5–3
Claude Opus 5.5vs Grok 4.7
Claude Opus 5.5 leads 7–0
Claude Opus 5.5vs GPT-Live-1
Claude Opus 5.5 leads 7–0
Claude Opus 5.5vs MiMo-V2.6-Pro
Claude Opus 5.5 leads 6–1
Claude Opus 5.5vs Gemini 3.8 Flash
Claude Opus 5.5 leads 7–1
Choose a matchup above, or start from the hub to pick any two models.