Anthropic · Flagship
Claude Opus 5.5 API pricing and specs
Anthropic's recommended default model, cheaper than Opus 5 was, with adaptive thinking that cannot be switched off and the new computer-use toolset.
$4
$0.20
$20
Forced tool choice returns an error, so send tool_choice auto with strict tools. Cache writes cost $5 per million for 5 minutes or $8 for an hour. A Fast mode preview costs $8 input and $40 output on the Claude API only.
Spec sheet
- API model string
claude-opus-5-5- Provider
- Anthropic
- Context
- 1M tokens
- Max output
- 128K tokens
- Released
- September 22, 2026
- Batch API
- 50% off, results within hours
- Documented agent features
- Tool callingStructured outputComputer useAdjustable reasoning
What a task costs
Four reference workloads priced at this model's list rates, with caching applied after the first call. Your numbers will differ; the calculator lets you change every assumption.
| Workload | Per task | Per 1,000 tasks |
|---|---|---|
| Support bot | $0.108 | $108 |
| Coding agent | $3.39 | $3,388 |
| Browser agent | $2.63 | $2,626 |
| Research agent | $2.55 | $2,548 |
Other Anthropic models
Similar cost elsewhere
Models from other providers whose cost on the 30-step coding workload is closest to this one.