Kimi K2 Thinking
Summary
Kimi K2 Thinking is an open-weight language model from Moonshot AI, released on 6 Nov 2025. It accepts text and generates text, with a 262K-token context window and up to 236K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.47 per million input tokens and $2 per million output tokens (Vercel AI Gateway), across 5 providers we track.
Thinking Kimi model for slower research passes, planning, and hard technical questions
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Moonshot AI |
|---|---|
| Release date | 6 Nov 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Open weights [Hugging Face] |
| License | modified-mit [Hugging Face] |
| Parameters | 1T [Hugging Face] |
| Context window | 262K (262,144 tokens) [models.dev] |
| Max output | 236K tokens [models.dev] |
| Knowledge cutoff | Aug 2024 [models.dev] |
| Input | Text [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
| Hugging Face | moonshotai/Kimi-K2-Thinking [Hugging Face] |
Kimi K2 Thinking API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| Vercel AI Gateway moonshotai/kimi-k2-thinking | $0.47 | $2 | $0.14 | 216K | models.dev, 4 Oct 2026 |
| Amazon Bedrock moonshot.kimi-k2-thinking | $0.60 | $2.50 | – | 262K | models.dev, 4 Oct 2026 |
| Novita AI moonshotai/kimi-k2-thinking | $0.60 | $2.50 | $0.15 | 262K | models.dev, 4 Oct 2026 |
| Hugging Face Inference Providers moonshotai/Kimi-K2-Thinking | $0.60 | $2.50 | $0.15 | 262K | models.dev, 4 Oct 2026 |
| OpenRouter moonshotai/kimi-k2-thinking | $0.60 | $2.50 | – | 262K | OpenRouter, 4 Oct 2026 |
Frequently asked questions
What is the context window of Kimi K2 Thinking?
Kimi K2 Thinking has a context window of 262,144 tokens (262K) and can generate up to 235,929 tokens in a single response, according to models.dev.
How much does the Kimi K2 Thinking API cost?
Kimi K2 Thinking is listed from $0.47 per million input tokens and $2 per million output tokens (Vercel AI Gateway). Prices last verified 4 Oct 2026.
Is Kimi K2 Thinking open source?
Kimi K2 Thinking is an open-weight model: its weights are published on Hugging Face as moonshotai/Kimi-K2-Thinking under the modified-mit license. Check the license terms before commercial use.
When was Kimi K2 Thinking released?
Moonshot AI released Kimi K2 Thinking on 6 Nov 2025, according to models.dev.
Which providers offer Kimi K2 Thinking?
We track Kimi K2 Thinking on 5 providers: Vercel AI Gateway, Amazon Bedrock, Novita AI, Hugging Face Inference Providers, OpenRouter.
Change history
No changes detected since we started tracking this model. We re-check every source daily.
Sources
- https://openrouter.ai/moonshotai/kimi-k2-thinking
- https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/moonshotai/kimi-k2-thinking.toml
- https://huggingface.co/moonshotai/Kimi-K2-Thinking
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/moonshotai/kimi-k2-thinking.toml
- https://github.com/sst/models.dev/blob/dev/providers/amazon-bedrock/models/moonshot.kimi-k2-thinking.toml
- https://github.com/sst/models.dev/blob/dev/providers/novita-ai/models/moonshotai/kimi-k2-thinking.toml
- https://github.com/sst/models.dev/blob/dev/providers/huggingface/models/moonshotai/Kimi-K2-Thinking.toml