[AINews] Kimi K3 2.8T-A50B: the largest open model ever released; Opus 4.8-class at Sonnet 5 pricing
Moonshot AI has released Kimi K3 2.8T-A50B, which the source calls "the largest open model ever released." The model is said to deliver "Opus 4.8-class at Sonnet 5 pricing," suggesting it matches the performance of a high-end proprietary model while being priced similarly to a more affordable one. This release represents a notable advancement in open-source AI, as it makes frontier-level capabilities available at a lower cost. The source does not provide specific benchmark numbers, pricing details, or context window size, but the qualitative description indicates a strong performance-to-price ratio. The model's size (2.8 trillion parameters with 50 billion active parameters) and open-source nature are highlighted as key differentiators.
Developers gain access to frontier-level open-source AI at a fraction of the cost.