[AINews] Kimi 3.1 Pro 104BA-2.8T: Fable-5.1-Class Open Weights narrows Closed-AI lead to 1 month... and Pro Highspeed API with 2-3× speed

Moonshot launched Kimi K3.1 Pro, a multimodal 3T-class mixture-of-experts model with 2.8 trillion total parameters, 104 billion active parameters and a 1-million-token context window, available via API with weights promised for November 4, 2026. Artificial Analysis placed it fourth on its Intelligence Index at 55, behind Opus 5.5 at 58 and Sonnet 5.5 and Muse Wonder Full at 56, and said the leading-open-versus-proprietary gap would narrow from 12 points to three once weights are released. Standard pricing is $2/M input, $10/M output and $0.20/M cached input tokens, with a Highspeed version at twice the price that Moonshot claims generates output 2–3× faster.