Claude Opus 5.5
Anthropic · anthropic/claude-opus-5.5
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Claude Opus 5.5 ranks #19 of 374 models in the default AI Benchmark Hub order (quality first, then cost). At $12.00 blended per million tokens, it is cheaper than 7% of models with published API pricing. Its 1,000,000-token context window is 3.8× the catalog median (262,144 tokens). A quality index of 80.6 places it at #19 of 37 models with an Arena Elo signal.
Context
Max output: 128000
Pricing
Output / 1M: 20.00
Blend / 1M: 12.00
Quality
Provider
Moderated: yes
Monthly cost at this blended rate
Estimated API spend if every token is billed at $12.00per million (the blend of this model's input and output prices). Real bills depend on the input/output mix.
| Tokens / month | Est. cost (USD) |
|---|---|
| 1,000,000 | $12.00 |
| 10,000,000 | $120.00 |
| 100,000,000 | $1200.00 |
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