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China's Moonshot AI Unveils 2.8-Trillion-Parameter Kimi K3, Rattling Global Chip and AI Stocks

July 17, 2026 at 13:21 EDT

Foundation Models
Open Source
Infra & Chips

Chinese startup Moonshot AI released Kimi K3 on July 16, 2026, an open-weight model it bills as the world's largest open-source AI system, spurring a sell-off in AI and semiconductor shares as investors reassessed the cost advantage of leading U.S. models.

July 16, 2026 · Moonshot AI

Kimi K3 lands — and rattles AI stocks

A Beijing lab unveils what it calls the world's largest open-source AI model — 2.8 trillion parameters, frontier-class benchmarks — reviving fears that cheap, open Chinese models undercut premium U.S. systems.

2.8T

total parameters (MoE — only a subset active per query)

token context window, native text · image · video

1679

Elo — topped a frontend-coding leaderboard

Pricing per million tokens

Mid-tier — comparable to Claude Sonnet, below the priciest U.S. flagships.

Input

$15

Output

The Kimi line — a fast climb to K3

~1T

→

K2.5

→

K2.6

→

2.8T

Why the buzz

Frontier-class benchmarks vs top U.S. models
Open weights due July 27, MIT-style license
Strong early developer reception on coding

The caveats

Only days old — no real long-run testing
Early benchmark leads can overstate reliability
Pricier than earlier Chinese models

Echoing the 2025 "DeepSeek moment," the launch pushed AI and chip stocks lower on fears a high-performing, openly available Chinese model could undercut U.S. incumbents' premium pricing — a sign of how sensitive markets have become to the pace of Chinese AI.

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