Kimi K3

Moonshot AI's new flagship (released July 16, 2026): a 2.8-trillion-parameter model billed as the largest open-weight model ever, with full weights scheduled for release on July 27, 2026. It pairs a 1M-token context window with native vision and an always-on thinking mode, and is positioned as Moonshot's strongest coding model. Available now in Kimi Code and the Kimi app; API pricing is not yet published. Coverage so far: simonwillison.net and Fortune (both July 16, 2026).

Kimi K3 strengths

• 2.8T parameters — billed as the largest open-weight model ever
• 1M-token context window
• Native vision (image input)
• Always-on thinking mode
• Long agentic sessions, large-repo navigation, terminal tool orchestration

Pricing & context

Moonshot AI has not published API per-token pricing yet — the model is currently available through Kimi Code and the Kimi app. We will add list prices to the leaderboard once they appear.

When to choose Kimi K3

Kimi K3 is positioned as Moonshot AI's strongest coding model: long agentic engineering sessions, large-repo navigation and terminal tool orchestration, with room for very large codebases in its 1M-token context. Reported benchmarks sit near top proprietary systems, but no specific scores have been published in our sources — treat those claims as vendor-reported until the weights land. For Moonshot models with published API list prices today, see Kimi K2.7 Code and Kimi K2.6.

Kimi K3 FAQ

How much does Kimi K3 cost?

Moonshot AI has not yet published API pricing for Kimi K3. The model is available now in Kimi Code and the Kimi app, so current access runs through those products rather than published per-token rates.

What is Kimi K3 best for?

Kimi K3 is positioned as Moonshot AI's strongest coding model, aimed at long agentic engineering sessions, large-repo navigation and terminal tool orchestration, backed by a 1M-token context window.

Is Kimi K3 open source?

Moonshot AI bills the 2.8-trillion-parameter Kimi K3 as the largest open-weight model ever. The full weights are scheduled for release on July 27, 2026.

Is Kimi K3 multimodal?

Yes. Kimi K3 has native vision, accepting image input alongside text, and runs an always-on thinking mode.