Compare
Anthropic: Claude Opus 5.5 vs Anthropic: Claude Sonnet 5.5
Anthropic: Claude Opus 5.5 and Anthropic: Claude Sonnet 5.5 are both reasoning models. This page compares the specs we have. It does not declare a quality winner — Arena and Artificial Analysis keep those numbers.
Live specs
| Anthropic: Claude Opus 5.5 | Anthropic: Claude Sonnet 5.5 | |
|---|---|---|
| Type | reasoning | reasoning |
| Input | $4 / M | $2 / M |
| Output | $20 / M | $10 / M |
| Context | 1.0M | 1.0M |
| Inputs | text, image, file | text, image, file |
| Tools | yes | yes |
| Weights | unverified | unverified |
PickAnthropic: Claude Opus 5.5 if
- its lab, license, or the explainer matches the job better
PickAnthropic: Claude Sonnet 5.5 if
- input price matters. Anthropic: Claude Sonnet 5.5 lists $2 / M in
Saved runs
No public playground runs include both models yet.