Kimi K2 with always-on extended reasoning for complex problem solving.
Anthropic's new flagship for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5.
No shared demos for these models yet.
No captured outputs for these models yet.
Both Kimi K2 Thinking and Claude Opus 5.5 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. Claude Opus 5.5: $4.00 input / $20.00 output.
Claude Opus 5.5 has a larger context window: Kimi K2 Thinking supports 262K tokens vs Claude Opus 5.5 at 1M tokens.
Claude Opus 5.5 supports vision/image input, but Kimi K2 Thinking does not.
Key differences: Kimi K2 Thinking is significantly cheaper; only Claude Opus 5.5 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 Claude Opus 5.5 for free on idapt.app to see which performs better for your specific needs.