Moonshot AI: Kimi K2 Thinking
Kimi K2 Thinking is a reasoning model from Moonshot AI released on Nov 1, 2024. It reads text and writes text, with a 262K token context window and up to 98K tokens per reply.
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It costs $0.60 per million input tokens and $2.50 per million output tokens. Cached input bills at $0.15, 75% less than fresh input.
It supports tool calling, structured JSON output and prompt caching, and its weights are open, so you can host it yourself.
16 providers serve it, including Amazon Bedrock, Hugging Face and Novita AI. The lowest input price is $0.48 per million tokens at Helicone.
- Modalities
- In / out price
- $0.60 / $2.50 per 1M
- Context
- 262K
- Max output
- 98K
- Released
- Nov 1, 2024
- Knowledge cutoff
- Aug 2024
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Kimi K2 Thinking pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $0.60 / 1M tokens | |
|---|---|---|
| Output | $2.50 / 1M tokens | |
| Cached input (read) | $0.15 / 1M tokens | 75% off input |
Kimi K2 Thinking providers
16 providers serve it, including Amazon Bedrock, Hugging Face and Novita AI. The lowest input price is $0.48 per million tokens at Helicone. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Amazon Bedrock | $0.60 | $2.50 | – | 262K | 16K |
| Hugging Face | $0.60 | $2.50 | $0.15 | 262K | 262K |
| Novita AI | $0.60 | $2.50 | $0.15 | 262K | 98K |
| Helicone | $0.48 | $2 | – | 256K | 262K |
| IO.NET | $0.55 | $2.25 | $0.275 | 33K | 4K |
| Alibaba (China) | $0.574 | $2.29 | – | 262K | 16K |
| 302.AI | $0.575 | $2.30 | – | 262K | 262K |
| Charm Hyper | $0.60 | $2.50 | $0.30 | 262K | 26K |
| DevPass (LLM Gateway) | $0.60 | $2.50 | $0.06 | 262K | 262K |
| Eden AI | $0.60 | $2.50 | – | 256K | 262K |
| Kilo Gateway | $0.60 | $2.50 | $0.15 | 262K | 98K |
| LLM Gateway | $0.60 | $2.50 | $0.06 | 262K | 33K |
Showing 12 of 16 providers: the lab first, then the major clouds, then the cheapest resellers.
What Kimi K2 Thinking costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Kimi K2 Thinking through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning - Temperature
temperature
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Kimi K2 Thinking questions
How much does the Kimi K2 Thinking API cost?
$0.60 per million input tokens and $2.50 per million output tokens, with cached input at $0.15. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Kimi K2 Thinking?
262,144 tokens of input, and it can write up to 98,304 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Kimi K2 Thinking?
16 providers serve it, including Amazon Bedrock, Hugging Face and Novita AI. The lowest input price is $0.48 per million tokens at Helicone. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Kimi K2 Thinking support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is Kimi K2 Thinking open source?
Its weights are published, so you can run it on your own hardware or a cloud of your choice. Read the license before commercial use.
When was Kimi K2 Thinking released?
Nov 1, 2024, with training data up to Aug 2024.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Kimi K2 Thinking?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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