[AINews] Kimi K3 2.8T-A50B: the largest open model ever released; Opus 4.8-class at Sonnet 5 pricing

Short summary

Moonshot AI released Kimi K3, a 2.8-trillion-parameter mixture-of-experts model with 50B active parameters, making it the largest open-weight model to date. The title claims performance comparable to Anthropic's Claude Opus 4.8 at the price point of Claude Sonnet 5. The body provides no additional detail beyond noting a strong week for open models.

• •Kimi K3 is a 2.8T-parameter MoE model with 50B active parameters, largest open release ever
• •Claimed performance matches Claude Opus 4.8 at Sonnet 5 pricing
• •Continues a trend of major open-weight model releases this week

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