Kimi K2 0905
Summary
Kimi K2 0905 is an open-weight language model from Moonshot AI, released on 4 Sept 2025. It accepts text and generates text, with a 262K-token context window and up to 98K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.60 per million input tokens and $2.50 per million output tokens (OpenRouter), across 1 provider we track.
Kimi K2 0905 is the September update of [Kimi K2 0711](moonshotai/kimi-k2). It is a large-scale Mixture-of-Experts (MoE) language model developed by Moonshot AI, featuring 1 trillion total parameters with 32...
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Moonshot AI |
|---|---|
| Release date | 4 Sept 2025 [OpenRouter] |
| Status | Generally available |
| Weights | Open weights [Hugging Face] |
| License | modified-mit [Hugging Face] |
| Parameters | 1T [Hugging Face] |
| Context window | 262K (262,144 tokens) [OpenRouter] |
| Max output | 98K tokens [OpenRouter] |
| Knowledge cutoff | 31 Dec 2024 [OpenRouter] |
| Input | Text [OpenRouter] |
| Output | Text [OpenRouter] |
| Reasoning mode | No [OpenRouter] |
| Tool calling | Yes [OpenRouter] |
| Structured output | Yes [OpenRouter] |
| Hugging Face | moonshotai/Kimi-K2-Instruct-0905 [Hugging Face] |
Kimi K2 0905 API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenRouter moonshotai/kimi-k2-0905 | $0.60 | $2.50 | – | 262K | OpenRouter, 4 Oct 2026 |
Frequently asked questions
What is the context window of Kimi K2 0905?
Kimi K2 0905 has a context window of 262,144 tokens (262K) and can generate up to 98,304 tokens in a single response, according to OpenRouter.
How much does the Kimi K2 0905 API cost?
Kimi K2 0905 is listed from $0.60 per million input tokens and $2.50 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.
Is Kimi K2 0905 open source?
Kimi K2 0905 is an open-weight model: its weights are published on Hugging Face as moonshotai/Kimi-K2-Instruct-0905 under the modified-mit license. Check the license terms before commercial use.
When was Kimi K2 0905 released?
Moonshot AI released Kimi K2 0905 on 4 Sept 2025, according to OpenRouter.
Change history
No changes detected since we started tracking this model. We re-check every source daily.