Moonshot AI released open weights for Kimi K3 on July 27, 2026: a 2.8-trillion-parameter mixture-of-experts model with a 1-million-token context window, the largest open-weight model released to date (surpassing DeepSeek V4 Pro at 1.6T and Zhipu GLM 5 at 744B). It is also served via API and OpenRouter.
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Moonshot releases Kimi K3, the largest open-weight AI model to date
Why this matters for founders
Founders wary of per-token API lock-in can route to (or self-host) a top open-weight model for more control over cost and data, or test it cheaply via OpenRouter before committing to a closed frontier vendor.
Source: PureAI
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