Detailed comparison of capabilities, features, and performance.
| Feature | GPT-5.1 codex max | Claude 4.6 Sonnet Max |
|---|---|---|
| AI Lab | OpenAI | Anthropic |
| Context Size | 400,000 tokens | 1,000,000 tokens |
| Max Output Size | 128,000 tokens | 16,000 tokens |
| Frontier Model | Yes | Yes |
| Vision Support | Yes | Yes |
| Description | A version of GPT-5.1 optimized for coding tasks set in max mode. | The latest Sonnet 4.6 model from Anthropic with effort set to max for highest reasoning and creativity, ideal for complex agentic tasks |
View detailed specifications and capabilities
View model details →View detailed specifications and capabilities
View model details →Access both GPT-5.1 codex max and Claude 4.6 Sonnet Max in a single workspace without managing multiple API keys.
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