Kimi K2 is an AI model released by Moonshot AI on Jul 11 2025, 40 days after Kimi-Dev. It is the 5th tracked release from Moonshot AI out of 10 total. It is an open-source / open-weight model.
It has 1T parameters. Its context window is 128k.
On published benchmarks, it scores 75.1% on GPQA Diamond (graduate-level science reasoning), 65.8% on SWE-Bench Verified (real-world software engineering).
About Moonshot AI: Chinese AI company building the Kimi family of models. Founded in 2023, known for long-context and efficient MoE architectures.