Claude Sonnet 5 vs GPT 5.1 Codex Max
Anthropic's fifth-generation Sonnet — near-Opus intelligence at Sonnet speed and price.
Extended-context coding model for large codebase operations.
No captured outputs for these models yet.
Frequently Asked Questions: Claude Sonnet 5 vs GPT 5.1 Codex Max▼
Which is better, Claude Sonnet 5 or GPT 5.1 Codex Max?
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Both Claude Sonnet 5 and GPT 5.1 Codex Max are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.
Which is cheaper, Claude Sonnet 5 or GPT 5.1 Codex Max?
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GPT 5.1 Codex Max has a lower blended cost. Claude Sonnet 5: $3.00 input / $15.00 output. GPT 5.1 Codex Max: $1.25 input / $10.00 output.
Which has a larger context window, Claude Sonnet 5 or GPT 5.1 Codex Max?
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Claude Sonnet 5 has a larger context window: Claude Sonnet 5 supports 1M tokens vs GPT 5.1 Codex Max at 400K tokens.
Do both Claude Sonnet 5 and GPT 5.1 Codex Max support vision?
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Yes, both Claude Sonnet 5 and GPT 5.1 Codex Max support vision/image input.
What are the key differences between Claude Sonnet 5 and GPT 5.1 Codex Max?
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Key differences: GPT 5.1 Codex Max is significantly cheaper. Compare full specs on this page.
Which model should I choose for my use case?
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If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Claude Sonnet 5 and GPT 5.1 Codex Max for free on idapt.app to see which performs better for your specific needs.