[AINews] Kimi K3 2.8T-A50B: the largest open model ever released; Opus 4.8-class at Sonnet 5 pricing
Moonshot AI releases Kimi K3, a 2.8T-parameter open model claiming frontier-class performance
“Open Frontier Intelligence”
Moonshot AI launched Kimi K3, a 2.8T total parameter (50B active) open-weights model with 1M-token context and native multimodal input, described as the largest open model ever released. The model is benchmarked as Opus 4.8-class in capability but priced at Sonnet 5 levels, directly challenging closed frontier models. This represents a significant escalation in the open-weights frontier race, with real cost-performance implications for developers and enterprises evaluating proprietary vs. open alternatives.