Kimi K2 with always-on extended reasoning for complex problem solving.
OpenAI's GPT-6.1 Sol served in pro reasoning mode for the hardest problems.
No shared demos for these models yet.
No captured outputs for these models yet.
Both Kimi K2 Thinking and GPT 6.1 Sol Pro 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 K2 Thinking has a lower blended cost. Kimi K2 Thinking: $0.60 input / $2.50 output. GPT 6.1 Sol Pro: $2.00 input / $10.00 output.
GPT 6.1 Sol Pro has a larger context window: Kimi K2 Thinking supports 262K tokens vs GPT 6.1 Sol Pro at 1.1M tokens.
GPT 6.1 Sol Pro supports vision/image input, but Kimi K2 Thinking does not.
Key differences: Kimi K2 Thinking is significantly cheaper; only GPT 6.1 Sol Pro supports vision input. 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 Kimi K2 Thinking and GPT 6.1 Sol Pro for free on idapt.app to see which performs better for your specific needs.