OpenAI's most advanced agentic coding model with 400K context.
Google's high-efficiency model for coding, agentic workflows, and web and app development.
No shared agent demos for these models yet.
No captured outputs for these models yet.
Both GPT 5.3 Codex and Gemini 3.6 Flash 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.
Gemini 3.6 Flash has a lower blended cost. GPT 5.3 Codex: $1.75 input / $14.00 output. Gemini 3.6 Flash: $1.50 input / $7.50 output.
Gemini 3.6 Flash has a larger context window: GPT 5.3 Codex supports 400K tokens vs Gemini 3.6 Flash at 1M tokens.
Yes, both GPT 5.3 Codex and Gemini 3.6 Flash support vision/image input.
GPT 5.3 Codex and Gemini 3.6 Flash 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.
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 GPT 5.3 Codex and Gemini 3.6 Flash for free on idapt.app to see which performs better for your specific needs.