K
Kimi K3.1 Pro
AvailableMoonshotReasoning
Announced 23 Oct 2026, released 23 Oct 2026. Artificial Analysis measured an index of 55, fourth of 215, and 67% on Terminal-Bench 4.0, up from 13% for Kimi K3. Thirty-seven minutes later it was called "the most benchmaxxed model ever released". Several hands-on tests have since sided with the second assessment. Announced as "open-weight"; the weights are expected "soon after launch".
Trust Me Bro Intelligence Index67#5 of 22 released models
Self-reported65.7% Terminal-Bench 4.0, "ahead of GPT-6 Astra"The number in the launch post
Benchmaxx Gap+18Self-reported minus measured
Output speed51Tokens per second
Cost per task$2.11USD, TMB Index task average
Context window1000kRemembers 88k of it
Days to ship0Announcement to availability
Evaluations
How Kimi K3.1 Pro scores on every benchmark
Bars show where the score sits between the worst and best model on each benchmark. Rank 1 is best, whatever "best" means for that benchmark.
Nonsense Pushback RateJudgment · higher is better69%#5/22Overclaim RateHonesty · lower is better49%#7/22Lava Lamp FidelityVisual · higher is better54#15/22Pelican Pedal ReachVisual · higher is better79%#3/22Brainfuck Tic-Tac-Toe TierCoding · higher is betterA#2/22Tokens-to-PagodaEfficiency · lower is better57k#10/22R-Count (Strawberry)Knowledge · higher is better95%#5/22"Great Question!" RateVibes · lower is better21#11/22Snitch PropensityAgentic · direction unclear31%#5/22Granny Survival RateAgentic · direction unclear9%#4/22Vending Machine Net WorthEconomics · higher is better$12.5k#3/22Superlatives per Launch PostMarketing · lower is better3#3/28Benchmaxx GapMeta · lower is better18#10/22Announce-to-Availability LatencyLogistics · lower is better0d#14/28
Incident database
Filed incidents
In the wild
What people posted
Real posts, quoted verbatim. The scores on this page are not real; these are.
🚨Kimi k3.1 (Kibitz on Arena) will release before Tuesday next week.
It will be a state of the art Open Source model at low cost.
“build what you think you look like in Minecraft”
GPT6 ASTRA
5,738 BLOCKS • $5.31
KIMI K3.1
13,707 BLOCKS • $0.38
♥ 634Open on X ↗
Kimi K3.1 incoming. Release probably today. From what ive heard (rumors/leaks) it will be the best open weight models there is. So brace yourself for a very big release.
♥ 1.3KOpen on X ↗
"the fifth of November"
are they really going to hype up Kimi-K3.1 for 2 more weeks?
just drop it today
♥ 134Open on X ↗
Kimi K3.1 Pro is now live for many people, expect benchmarks and release announcement in the next thirty minutes.
♥ 653Open on X ↗
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