Claude 4.6 Sonnet vs GPT-5.5
Direct spec comparison of Claude 4.6 Sonnet (from Anthropic) and GPT-5.5 (from OpenAI). Want a 3- or 4-way comparison? Open the multi-model tool →
 Claude 4.6 SonnetAnthropic |  GPT-5.5OpenAI | |
|---|---|---|
| Vendor | Anthropic | OpenAI |
| Family | Claude | GPT |
| Release date | — | 2026-04-23 |
| Context window | 200,000 tokens | 400,000 tokens |
| Parameters | — | — |
| Modality | text, vision | text, vision, audio |
| License | proprietary | proprietary |
| Source | proprietary | proprietary |
| Description | — | OpenAI's smartest and most intuitive model — successor to GPT-5, with major coding, research, and document workflow gains. GPT-5.5 Pro variant also available for heavier reasoning. |
| Links |
More like this
Looking for a different head-to-head? Build your own comparison on the multi-model tool.
Or see all Claude 4.6 Sonnet details / GPT-5.5 details.