Kimi K2 (0905) is an AI model released by Moonshot AI on Sep 5 2025, 56 days after Kimi K2. It is an open-source / open-weight model. Benchmark results (shown below) cover SWE-Bench Verified, and GPQA Diamond.
Parameters
1T
Context window
256k
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.