MoonshotAI: Kimi K2 Thinking
MoonshotAI's Kimi K2 Thinking is designed for handling extensive text inputs with a context length of 262,144 tokens and supports both reasoning and tools integration. It excels in understanding and processing natural language while enabling interactive workflows through its tool support. Despite its robust capabilities, the model falls short on structured output, making it less suitable for tasks requiring predefined data formats. Given its benchmark score of 54.6 across a single independent evaluation, MoonshotAI's Kimi K2 Thinking stands as a viable option for those prioritizing cost-effectiveness, particularly in text-based applications where reasoning and tool integration are crucial. Its pricing at $0.6 per million input tokens and $2.5 per million output tokens makes it accessible for budget-conscious users without compromising on performance.
Benchmark results
Independent, published benchmarks. Blended score 54.6 across 1 benchmark, last refreshed 2026-08-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 55.3 |
- Model ID
- moonshotai/kimi-k2-thinking
- Vendor
- moonshotai
- Released
- November 2025
- Tokenizer
- Other
- Input Modalities
- text
- Output Modalities
- text
- Max Output
- 100,352 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- text only
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $0.60/M input and $2.50/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.02 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.42 |
| A month of a busy support chatbot | 5M in / 2M out | $8.00 |
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Quick answers
- How much does MoonshotAI: Kimi K2 Thinking cost?
- $0.60 per million input tokens and $2.50 per million output tokens.
- What is MoonshotAI: Kimi K2 Thinking's context window?
- 262,144 tokens, roughly 393 pages of text in a single request.
- Does MoonshotAI: Kimi K2 Thinking support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can MoonshotAI: Kimi K2 Thinking process images?
- No, it is text-only on the input side.