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Physix Frontier · News Briefing Card (enbrief · Oct 25, 2026)

Moonshot launches K3.1 Pro, API price cut by one-third, weights open by Nov 4

KEY FACTS

  • On October 24, Moonshot launched K3.1 Pro and a Highspeed version.
  • K3.1 Pro retains K3's 2.8-trillion-parameter MoE architecture and redoes post-training.
  • The company promises to release the full model weights before November 4.
  • API pricing is 13 yuan per million input tokens and 68 yuan per million output tokens, one-third cheaper than K3.
  • It scores 55 on the Artificial Analysis Intelligence Index, 11 points higher than K3.

KEY DATA

65.7%Terminal-Bench 4.0 score
55 pointsArtificial Analysis Intelligence Index
13 yuan per million tokensAPI input price
68 yuan per million tokensAPI output price

PHYSIX OBSERVATION

K3.1 Pro directly targets Opus 5.5 with price cuts and open weights, narrowing the gap in third-party benchmarks. But user feedback shows that front-end aesthetics and subscription quotas remain weak spots, and compute cost pressure is unresolved. After the weights open in November, community validation will determine whether it can truly gain a firm foothold.

Source: enbrief original report ↗