Claude 4.6 Sonnet vs o3
Direct spec comparison of Claude 4.6 Sonnet (from Anthropic) and o3 (from OpenAI). Want a 3- or 4-way comparison? Open the multi-model tool →
 Claude 4.6 SonnetAnthropic |  o3OpenAI | |
|---|---|---|
| Vendor | Anthropic | OpenAI |
| Family | Claude | o-series |
| Release date | — | 2025-04-16 |
| Context window | 200,000 tokens | 200,000 tokens |
| Parameters | — | — |
| Modality | text, vision | text, vision |
| License | proprietary | proprietary |
| Source | proprietary | proprietary |
| Description | — | Reasoning-focused model in the o-series. |
| Links |
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