MoonshotAI: Kimi K2 0905
MoonshotAI's Kimi K2 0905 is designed for text-based tasks with a context length of up to 262,144 tokens and can generate up to 100,352 completion tokens. It supports input through text alone and can interface with external tools but lacks reasoning capabilities or structured output formats. Given its blended benchmark score of 38.1 across one independent test, Kimi K2 0905 stands as a solid option for those prioritizing cost-effectiveness, particularly in scenarios requiring tool integration. With pricing at $0.6 per million input tokens and $2.5 per million output tokens, it offers competitive value while performing adequately on benchmark tests; however, its performance may not be the top choice if high reasoning requirements are necessary.
Benchmark results
Independent, published benchmarks. Blended score 37.7 across 1 benchmark, last refreshed 2026-07-27. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 38.8 |
- Model ID
- moonshotai/kimi-k2-0905
- Vendor
- moonshotai
- Released
- September 2025
- Tokenizer
- Other
- Input Modalities
- text
- Output Modalities
- text
- Max Output
- 100,352 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- not 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 0905 cost?
- $0.60 per million input tokens and $2.50 per million output tokens.
- What is MoonshotAI: Kimi K2 0905's context window?
- 262,144 tokens, roughly 393 pages of text in a single request.
- Does MoonshotAI: Kimi K2 0905 support tool calling?
- It supports tool calling, structured output.
- Can MoonshotAI: Kimi K2 0905 process images?
- No, it is text-only on the input side.