Fireworks: Kimi-K2.5-FW
Kimi-K2.5-FW is a language model from Fireworks released on Jan 27, 2026. It reads text and images and writes text, with a 262K token context window and up to 16K tokens per reply.
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It costs $0 per million input tokens and $0 per million output tokens.
It supports tool calling.
- Modalities
- In / out price
- $0 / $0 per 1M
- Context
- 262K
- Max output
- 16K
- Released
- Jan 27, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Kimi-K2.5-FW 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 / 1M tokens | |
|---|---|---|
| Output | $0 / 1M tokens |
What Kimi-K2.5-FW 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-K2.5-FW through an OpenAI compatible API.
- Tools
tools
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More from Fireworks
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Kimi-K2.5-FW questions
How much does the Kimi-K2.5-FW API cost?
$0 per million input tokens and $0 per million output tokens. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Kimi-K2.5-FW?
262,144 tokens of input, and it can write up to 16,384 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Does Kimi-K2.5-FW support tool calling?
Yes. It accepts tool definitions, which is what an agent needs to call your APIs.
Is Kimi-K2.5-FW open source?
No. Fireworks serves it through an API only, so you cannot download the weights or host it yourself.
When was Kimi-K2.5-FW released?
Jan 27, 2026.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.