# Kimi K2: AI model fact sheet

- **Provider:** moonshotai
- **Released:** 2025-07-11
- **API pricing:** $0.57 / 1M input, $2.30 / 1M output
- **OpenRouter ID:** moonshotai/kimi-k2
- **Capabilities:** conversation, reasoning, code-generation, analysis

Kimi K2 is a large-scale Mixture-of-Experts (MoE) language model developed by Moonshot AI, featuring 1 trillion total parameters with 32 billion active per forward pass. It is optimized for agentic capabilities, including advanced tool use, reasoning, and code synthesis. Kimi K2 excels across a broad range of benchmarks, particularly in coding (LiveCodeBench, SWE-bench), reasoning (ZebraLogic, GPQA), and tool-use (Tau2, AceBench) tasks. It supports long-context inference up to 128K tokens and is designed with a novel training stack that includes the MuonClip optimizer for stable large-scale MoE training.

## Benchmarks

| Benchmark | Score |
| --- | --- |
| SWE-bench Verified | 65.8% |

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/kimi-k2