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The 6 top stories of the 120 AIBriefs curated that day.
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Mistral Large 4 ("Le Chonk") is a multimodal MoE with ~1T total and 49B active parameters and a 1M-token context, released under the Mistral Ecosystem Open-Weight License. Mistral says it scores 82% on the Artificial Analysis Cyber Index and ranks #1 on Cognition's FrontierCode among open models.
A 1T-parameter natively multimodal MoE with 49B active parameters, trained from scratch on 3,800 NVIDIA Grace Blackwell GPUs in Mistral's own European datacenters. API is live at $1.36/M input and $4.18/M output; weights drop end of October.
DeepSeek's update scores 45 on the Artificial Analysis Intelligence Index, up 6 points and tied for #2 among open-weights models. It hits 77.0 on DeepSWE and jumps Terminal-Bench 4.0 from 31.2 to 42.3, with API pricing at $0.15/$0.60 per million tokens off-peak.
Kimi K3.1 Pro is a 2.8T-total/104B-active MoE with a 1M-token context, priced at $2/M input and $10/M output. Artificial Analysis scores it 55, ahead of Claude Fable 5.1, GPT-6 Astra and Gemini 4 Argon (all 53), behind only Claude Opus 5.5 (58). Full weights are promised by Nov 4, 2026.
Anthropic's revised S-1A Risk Factors say internal estimates suggest future models may soon meet its own definition of RSI — compressing two years of AI progress into a much shorter span. The filing admits it may not detect the acceleration until after it happens.
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