Extended-context coding model for large codebase operations.
MoonshotAI's 2.8T-parameter flagship for complex coding, knowledge work, and long-horizon agent runs.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GPT 5.1 Codex Max and Kimi K3 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.
Kimi K3 has a lower blended cost. GPT 5.1 Codex Max: $1.25 input / $10.00 output. Kimi K3: $0.30 input / $11.94 output.
Kimi K3 has a larger context window: GPT 5.1 Codex Max supports 400K tokens vs Kimi K3 at 1M tokens.
Yes, both GPT 5.1 Codex Max and Kimi K3 support vision/image input.
Key differences: Kimi K3 is significantly cheaper. Compare full specs on this page.
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 5.1 Codex Max and Kimi K3 for free on idapt.app to see which performs better for your specific needs.