Kimi K3.1 Pro launches as revised Artificial Analysis index places it ninth

1. 13:55
   Latent Space

   Gemini 4 Carbon tops leaderboards, launches for cyber defenders

   Google DeepMind announced Gemini 4 Carbon, initially available to trusted cyber defenders through the Fairwind Program, with wider developer access promised as soon as possible. Latent Space reports that Carbon leads Artificial Analysis Intelligence Index v5 with a score of 59 and ranks #1 in Text Arena, while trailing some rivals on coding benchmarks. The model supports a 1M-token context window, accepts text, image, video and speech inputs, and produces text output.

1. 23:04
   The Decoder

   New Artificial Analysis index widens the gap between open and closed models

   Artificial Analysis revised its Intelligence Index, widening the gap between open models and the leaderboard’s top from 3 to 12 points. In version 5, Kimi K3.1 Pro falls from fourth to ninth behind eight closed models, while Grok 4.7 loses 12 points. Private test sets now account for 60 percent of the index to counter training on known questions, though researcher Nathan Lambert also points to differences in reinforcement learning infrastructure.

2. 10:59
   Ethan Mollick · X

   Artificial Analysis reports a wider open weights model gap on closed benchmarks

   Ethan Mollick says Artificial Analysis’s move to closed benchmarks reveals a wider open weights model gap, while urging caution about the findings. Artificial Analysis reports that Kimi K3.1 Pro, whose weights are not yet released, scores 46 in v5, 12 points behind the leader versus a 3-point gap in v4.3. Among models with released weights, DeepSeek V4.1 Flash 1017 (max) and GLM-5.3 (max) lead at 32, below Claude Haiku 5.5 (max). https://twitter.com/ArtificialAnlys/status/2115265171233120627

1. 15:18
   Latent SpacePicks

   Moonshot launches Kimi K3.1 Pro with weights promised November 4 and faster Highspeed API

   Moonshot launched Kimi K3.1 Pro, a multimodal MoE model with 2.8 trillion total parameters, 104 billion active parameters, and a 1-million-token context window. Artificial Analysis ranked it fourth with a score of 55, while weights remained unpublished and were promised for November 4, 2026. Standard and Highspeed access launched across Kimi products and API, with Moonshot claiming 2–3× faster output at twice the standard price for Highspeed.

2. 06:51
   Artificial Analysis · X

   Kimi K3.1 Pro leads openly available models on Artificial Analysis Cyber Index

   Artificial Analysis reports that Kimi K3.1 Pro scores 64% on its Cyber Index, leading openly available models and trailing trusted-access GPT-6 Sol (Daybreak Blue, max, 69%). The index measures agentic cyber defense across three benchmarks, primarily through public APIs, where safety refusals can reduce scores. K3.1 Pro encounters no safety refusals, but its $2.81 Cost per Task is 15% higher than Kimi K3 despite 33% lower per-token prices.

3. 03:40
   Simon WillisonPicks

   Introducing Kimi K3.1 Pro

   Kimi K3.1 Pro launched on the Kimi API today, with Moonshot promising full model weights by Nov 4, 2026. Pricing is USD $2.00/million input tokens and $10/million output tokens; a Highspeed version offers 2-3x faster performance at twice the price, except for input token cache hits. Artificial Analysis scored it at 55, behind Claude Opus 5.5 at 58 and ahead of three models at 53; Simon Willison also tested SVG pelican generation at its low, medium, and max reasoning levels.

4. 03:00
   The DecoderPicks

   Kimi K3.1 Pro ranks fourth on Artificial Analysis, approaching Claude Opus 5.5

   Moonshot AI released Kimi K3.1 Pro, which scores 55 on the Artificial Analysis Intelligence Index, up 11 points from K3 and 3 points behind Claude Opus 5.5. It is available through Kimi.ai, Kimi Work, Kimi Code, and the Kimi API, alongside a Highspeed variant that Moonshot says runs two to three times faster. Token prices fall 33 percent; if weights are released as planned by November 4, 2026, it could become the highest-scoring open-weights model, assuming rankings remain unchanged.

5. 02:17
   Nathan Lambert · X

   Kimi K3.1 Pro launches at fourth on Artificial Analysis Intelligence Index

   Nathan Lambert notes that Kimi K3.1 Pro scores higher than Fable 5.1 and Astra 6. Quoting Artificial Analysis, the model ranks fourth on its Intelligence Index with a score of 55, gaining 11 points over Kimi K3 and making large gains in agentic performance. Artificial Analysis says it will lead open-weights models once its weights are published. https://t.co/ac2dn5IEz7

6. 01:44
   Artificial Analysis · X

   Kimi K3.1 Pro launches at fourth on the Artificial Analysis Intelligence Index

   Artificial Analysis reports that Kimi K3.1 Pro launches at fourth on its Intelligence Index with a score of 55, gaining 11 points over Kimi K3 and making large gains in agentic performance. It says the new reasoning model will lead open-weights models once its weights are published. https://t.co/BphLwAbST0

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