Artificial intelligence · July 2025

Kimi K2 open MoE

A trillion-parameter open-weight model built for agentic work.

Moonshot AI released Kimi K2, a mixture-of-experts model with 1 trillion total and 32 billion active parameters, under a modified MIT licence. It scored 65.8% on SWE-bench Verified in a single attempt, which kept open weights close to the closed frontier on coding.

See it in the living tree Wikipedia Source

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 2

DeepSeek-V3 2024
Mixture of experts 1991

What it led to 1

Kimi K3 2026

Related measurements

The dashed line marks when it first worked.

Best AI score on GPQA Diamond Latest: 95.8 % correct (2026) Source: Epoch AI, Capabilities & benchmarking (benchmark_data.zip, gpqa_diamond.csv); Anthropic: Claude 3 public launch (March 4, 2024)

Training compute of notable AI models Source: Epoch AI, Notable AI Models (CC BY 4.0)