RELEASE · MODELS · #2509
Moonshot releases Kimi K3.1 Pro, climbs to #4 on Artificial Analysis index
Moonshot AI has released Kimi K3.1 Pro, a post‑trained update to Kimi K3 that scores 55 points on the Artificial Analysis Intelligence Index (an 11‑point gain), placing it fourth and three points behind top proprietary models such as Claude Opus 5.5. The model keeps 2.8 trillion parameters (104B active), a 1M‑token context window, ships a faster ‘Highspeed’ variant, cuts API token prices by ~33%, and the company says it plans to release model weights by November 4, 2026.
KEY POINTS
- Moonshot AI has released Kimi K3.1 Pro, a post‑trained update to Kimi K3 that scores 55 points on the Artificial Analysis Intelligence Index (an 11‑point gain), placing it fourth and three points behind top proprietary models such as Claude Opus 5.5.
- The model keeps 2.8 trillion parameters (104B active), a 1M‑token context window, ships a faster ‘Highspeed’ variant, cuts API token prices by ~33%, and the company says it plans to release model weights by November 4, 2026.
- If Moonshot follows through on releasing weights, K3.1 Pro would narrow the gap between open‑weights and top proprietary models, affecting competition, access, and safety dynamics in advanced LLMs.
WHY IT MATTERS
If Moonshot follows through on releasing weights, K3.1 Pro would narrow the gap between open‑weights and top proprietary models, affecting competition, access, and safety dynamics in advanced LLMs.