Breaking

Moonshot AI Launches Kimi K3.1 Pro for Complex Tasks and Professional Work

October 23, 2026 at 12:07 EDT

Foundation Models
AI Agents

Moonshot AI has begun rolling out Kimi K3.1 Pro across web and mobile platforms, positioning its latest flagship model as an all-around system for complex tasks and professional work. The announcement, confirmed on October 23, 2026, marks the evolution of the company's 2.8-trillion-parameter Kimi K3, which debuted in July 2026 as the first open-weight model in the 3-trillion-parameter class.

October 23, 2026 · Moonshot AI

Kimi K3.1 Pro: Cost-Efficient Open-Weight Flagship

Moonshot AI releases Kimi K3.1 Pro with enhanced agentic capabilities and 40% lower token costs than proprietary competitors.

Key Metrics

2.8T

Parameters

Token Context

Cost Comparison vs. Claude Opus 5

Claude Opus 5

$5/MTok

Kimi K3.1 Pro

$3/MTok

Input token cost per million tokens (MTok)

Performance Highlights

✓ #1 ranking on Arena frontend code leaderboard (blind preference testing)
✓ Low/High/Max reasoning effort settings for task complexity tuning
✓ Enhanced agentic tasks: Agent, Swarm, search, and batch processing

Availability: Rolling out on Kimi.ai web and mobile. Access via API ($3/$15 per MTok input/output) or consumer tiers (free Adagio to $199/month premium).

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