Kimi K2.5 (Reasoning)

by Moonshot AI

Kimi K2.5 (Reasoning) is a reasoning model from Moonshot AI, released on January 27, 2026. It has a 262K-token context window and can generate up to 262K output tokens. API pricing is $0.6 per 1M input tokens and $3 per 1M output tokens.

Kimi K2.5 is Moonshot AI's flagship agentic model and a new SOTA open model. It unifies vision and text, thinking and non-thinking modes, and single-agent and multi-agent execution into one model. Built with Full-Parameter RL tuning, it achieves state-of-the-art performance across agents, coding, image, and video benchmarks.

Key specs

ProviderMoonshot AI
Release date2026-01-27
Licenseopen source
Context window262K tokens
Max output262K tokens
Input price$0.6 / 1M tokens
Output price$3 / 1M tokens
Intelligence Score38.6
Coding index24.5

Quick answers

What is the context window of Kimi K2.5 (Reasoning)?

Kimi K2.5 (Reasoning) has a context window of 262K tokens, with a maximum output of 262K tokens per response.

How much does Kimi K2.5 (Reasoning) cost?

Kimi K2.5 (Reasoning) costs $0.6 per 1M input tokens and $3 per 1M output tokens through the API.

Is Kimi K2.5 (Reasoning) open source?

Yes. Kimi K2.5 (Reasoning) is an open model released under the open source license.

When was Kimi K2.5 (Reasoning) released?

Moonshot AI released Kimi K2.5 (Reasoning) on January 27, 2026.

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