Kimi K2 is an AI model released by Moonshot AI on Jul 11 2025, 40 days after Kimi-Dev. It is an open-source / open-weight model. Benchmark results (shown below) cover SWE-Bench Verified, and GPQA Diamond.
Parameters
1T
Context window
128k
Benchmarks
Coding
SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better.
65.8%
Science
GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better.