Kimi K2 Thinking vs Claude Sonnet 4.5 (latest)

How to read this comparison

This page compares Kimi K2 Thinking and Claude Sonnet 4.5 (latest) on the dimensions that matter most for production LLM selection: per-token cost, context window, declared capabilities (tool calling, structured output, reasoning, vision), and provider availability.

Green highlights in the table indicate which model leads on a given row. "Leads" means lower price or higher context/capability — not necessarily "better for your use case". A model that costs 3× more may still be the right choice if it unlocks a capability you need.

What this comparison does NOT tell you

• Quality / accuracy — we have no benchmark data. Declared capabilities ≠ measured performance.
• Latency — time-to-first-token varies by provider, region and load. Test with your actual traffic.
• Prompt caching savings — if you reuse system prompts, the cheaper model on headline rate may not be cheapest in practice.
• Fine-tuning availability — not all models can be fine-tuned, even if they are open-weight.

Data is refreshed daily. If a model's capabilities or pricing change, this page updates automatically on the next build cycle.