Anthropic
Claude Opus 5.5 (Adaptive Reasoning, Low Effort, Default Fallback)
Claude Opus 5.5 is a step-change improvement over Opus 5 for agentic coding, long-running agentic tasks, knowledge work, communication, and vision. It is more token-efficient per completed task and reports progress, findings, and next steps in clear language.
Introducing Claude OpusModel Snapshot
TypeLanguage
ReleaseSep 22, 2026
Context1,000,000
Tagsexplicit-caching, fast, file-input, reasoning
Overall
Rank #43 across 687
42.3
Coding
No rank
n/a
Blended Price
Rank #380 across 432
$8.00/M
Strength Profile
Percentile score by analysis domain.
* Cost is inverted: lower input, output, and blended prices rank higher.
Benchmark Percentiles
Higher bars mean stronger relative placement.
Model Details
Runtime
Output Speed72.4 tok/s
First Token2.82s
Max Output128,000
Pricing
Blended$8.00/M
Input$4.00/M
All Benchmarks
| Metric | Domain | Value | Rank |
|---|---|---|---|
| Artificial Analysis Intelligence Index | overall | 42.3 | #43 |
| Humanity's Last Exam | reasoning | 48.3% | #24 |
| SciCode | coding, reasoning | 58.6% | #18 |
| Output Speed | speed | 72.4 tok/s | #114 |
| Time to First Token |