Gemini 3.5 Flash vs GPT 5.1 Codex Max
Google's high-speed thinking model for agentic workflows, chat, and coding.
Extended-context coding model for large codebase operations.
No captured outputs for these models yet.
Frequently Asked Questions: Gemini 3.5 Flash vs GPT 5.1 Codex Max▼
Which is better, Gemini 3.5 Flash or GPT 5.1 Codex Max?
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Both Gemini 3.5 Flash 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, Gemini 3.5 Flash or GPT 5.1 Codex Max?
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Gemini 3.5 Flash has a lower blended cost. Gemini 3.5 Flash: $1.50 input / $9.00 output. GPT 5.1 Codex Max: $1.25 input / $10.00 output.
Which has a larger context window, Gemini 3.5 Flash or GPT 5.1 Codex Max?
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Gemini 3.5 Flash has a larger context window: Gemini 3.5 Flash supports 1M tokens vs GPT 5.1 Codex Max at 400K tokens.
Do both Gemini 3.5 Flash and GPT 5.1 Codex Max support vision?
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Yes, both Gemini 3.5 Flash and GPT 5.1 Codex Max support vision/image input.
What are the key differences between Gemini 3.5 Flash and GPT 5.1 Codex Max?
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Gemini 3.5 Flash and GPT 5.1 Codex Max have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.
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 Gemini 3.5 Flash and GPT 5.1 Codex Max for free on idapt.app to see which performs better for your specific needs.