A post-trained successor to K3 with sparse attention, positioned as Moonshot’s strongest open-weight agent and coding model. It has a 1M tokens context window, and its weights are openly available. Check Moonshot AI’s pricing page for current rates.

Among the tools we track, it’s available in Amp. A faster highspeed variant launched alongside it. It’s also part of ClinePass, and Moonshot documents using it with Codex and Claude Code through its own API.

What Moonshot AI reports

  • Moonshot reports 65.7 on Terminal-Bench 4.0
  • Moonshot reports 75.5 on DeepSWE v1.1

Vendor-reported figures, not independently verified by Code×Radar.

Related changes

Sources

Facts last checked November 15, 2026.