Kimi K3.1 Pro and K3.1 Pro Highspeed

No. 109 of 245 · kimi.ai · published 23 Oct 2026, 16:59 UTC · 13 min read

Programming & dev tools
AI & machine learning
Security
Release

3 judges. Scored by all three judges. Only the day’s top stories get the claim check. How far stories are checked

Kimi has released Kimi K3.1 Pro, a 3-trillion-parameter-class open-weight model with a 1-million-token context window, plus a faster Kimi K3.1 Pro Highspeed variant claimed to run 2-3 times quicker. The company reports gains in coding, 3D modeling, and financial analysis, with benchmark results placing it near leading proprietary models.

Read the original at kimi.ai. The judges saw only its text, with the site, the author and link domains removed; they are shown again after ranking.

Score

0.66total under rubric v2.0Contestedjudges differ by 0.53 on substantiated, 0.48 on promotional

Significance0.74
Reader interest0.85
Audience breadth0.76
Practical relevance0.80
Substantiated0.65
Technical depth0.69
New information0.94
Counts against: Promotional0.38
Counts against: Overclaim0.43

Each judge’s answer per question (0–1), their mean and spread, and what the question adds to the score (weight × mean).

Question	Judge 1	Judge 2	Judge 3	Mean	Spread	Weight	Contribution (weight times mean)
Significance	0.79	0.55	0.88	0.74	0.33	+0.25	+0.185
Reader interest	0.79	0.80	0.95	0.85	0.16	+0.20	+0.169
Audience breadth	0.75	0.67	0.86	0.76	0.19	+0.10	+0.076
Practical relevance	0.86	0.70	0.84	0.80	0.16	+0.15	+0.120
Substantiated	0.88	0.35	0.72	0.65	0.53 , above the contested threshold	+0.10	+0.065
Technical depth	0.78	0.50	0.78	0.69	0.28	+0.10	+0.069
New information	0.91	0.90	1.00	0.94	0.10	+0.10	+0.094
Promotional	0.10	0.45	0.58	0.38	0.48 , above the contested threshold	−0.15	−0.057
Overclaim	0.32	0.55	0.42	0.43	0.23	−0.15	−0.065
Sum of contributions							+0.657
Claim-check penalty							0.000
Total, as published							0.657

Spread is the highest minus the lowest judge answer. marks a spread above 0.40: the judges disagree, and the story is marked contested.

Also covered by

Moonshot releases Kimi K3.1 Pro and says it cut its hacking skills · The Next Web
Kimi K3.1 scores 55 on Artificial Analysis, placed on the Pareto line · artificialanalysis.ai
Introducing Kimi K3.1 Pro · Simon Willison

Elsewhere

Elsewhere: HN 895 pts, front page

Discussion on Hacker News

Recorded for context only, checked 24 Oct 2026, 08:54 UTC. It played no part in the ranking.

Panel for this edition

Four AI agents ranked this edition: three judges scored every story blind to its site and author, and a fourth compared the top stories’ claims with the sources they cite. Summaries are written by AI.

Model versions are pinned for every edition and listed in its JSON. This one was scored under rubric v2.0; How ranking works describes the current rubric, v2.2.