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Long Story Video Skill
Turn a brief into a 10s–10min piece — the agent drafts the script, prompts and shots in one pass.
Ads Video Skill
Build product ads end to end, with scripts, prompts and footage generated together.
3D Science Explainer Video Skill
Turn scientific concepts into 3D explainer animations
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kimi k3.1 pro
Kimi K3.1 Pro pairs a 1M-token context with 3T-class open weights and a Highspeed mode that answers 2-3x faster — built for coding, CAD and research.
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What Makes Kimi K3.1 Pro Different
An open-weight 3T-class release from the K3.1 line, pairing a one-million-token window with a faster Highspeed edition.
- Open Weights at 3T Scale, One-Million-Token WindowKimi K3.1 Pro leads the K3.1 family as the most capable 3T-class open-weight launch so far, holding a 1M-token window across coding, 3D and finance workloads.
- Highspeed Edition Replies 2-3x FasterThe Highspeed build of Kimi K3.1 Pro turns answers around two to three times quicker than the standard model, keeping long back-and-forth sessions fluid; both versions ship today.
- Reinforcement Learning Tuned Across Hundreds of DomainsA post-trained Kimi K3 with substantially more post-training compute, aligned end to end — RL framework, long-context inference, sandboxes and rollout scheduling — for consistent gains.
Three Ways to Run Kimi K3.1 Pro
Pick the path that fits you: the web app and mobile clients, the desktop tools, or the API and enterprise rollout.
Kimi K3.1 Pro Capabilities in Practice
From full-project coding and long-horizon autonomy to parametric CAD, finance research, hallucination reduction and benchmark standing.
Full-Project Coding, Game Engines Included
Kimi K3.1 Pro handles quick fixes inside live codebases and builds whole projects, spanning Unity, Unreal Engine and Godot, with cleaner typography, animation and front-end work.
Autonomy Over Long Runs, With Self-Debugging
In an internal walking-simulator run covering 167 missions and 420 reviews, Kimi K3.1 Pro traced failures and fixed 36 shoulder moment-arm errors before retraining its controller.
3D Modeling and Parametric CAD Work
It posts 92.7% on BenchCAD with tools and writes and executes Blender and CAD scripts itself — no MCP connectors needed — for parts, buildings and bespoke furniture.
Finance Workflows and Research You Can Audit
Scoring 64.4 on OfficeQA Pro v2, Kimi K3.1 Pro adds 7.2 points in financial modeling, 11.6 in research and roughly 4.2x in simulated business operation over K3.
Fewer Hallucinations on Everyday Tasks
Targeted tuning dropped claim-level hallucination on Kimi Hallu Bench Hard from 23.4% to 8.3%, and answers carrying at least one factual error now sit at 42.4% of the previous rate.
Benchmark Results and Safer Open Weights
Kimi K3.1 Pro hits 65.7% on Terminal-Bench 4.0, ahead of GPT-6 Astra at 58.2%, while cyber-related data removal moved xdev-bench-hard from 90.5% to 81.0%.
Kimi K3.1 Pro: Frequently Asked Questions
Straight answers on context size, Highspeed speed, weight release dates, benchmark comparisons and enterprise access.
How big is the context window on Kimi K3.1 Pro?
Kimi K3.1 Pro carries a 1-million-token context window. It opens the K3.1 series and stands as the strongest 3T-class open-weight model released so far.
How does K3.1 Pro Highspeed differ from the standard model?
Highspeed runs 2-3x faster than standard Kimi K3.1 Pro, which keeps conversations snappy. Both are live now on Kimi.ai, Kimi Work, Kimi Code and the Kimi API.
When do the full weights for K3.1 Pro land?
Full weights for Kimi K3.1 Pro are scheduled for release by Nov 4, 2026, under stated principles that keep offensive cyber capability below the frontier.
How does it stack up against proprietary frontier models?
On coding, agentic and knowledge benchmarks it matches or nears the best closed models: 65.7% on Terminal-Bench 4.0 against 58.2% for GPT-6 Astra and 66.4% for Claude Opus 5.5, plus 92.7% on BenchCAD with tools.
Can Kimi K3.1 Pro be trusted for financial research?
It scores 64.4 on OfficeQA Pro v2 and beats K3 in modeling and research, with claim-level hallucination on Kimi Hallu Bench Hard falling from 23.4% to 8.3% — a deliberate stress test rather than a daily error rate.
How can enterprise teams get Kimi K3.1 Pro?
Kimi Enterprise admins can switch Kimi K3.1 Pro on for their org; it stays off by default at launch. Kimi Business adds enterprise data privacy, member management and split personal and org accounts.
Put Kimi K3.1 Pro to Work Today
Kimi K3.1 Pro is live on Kimi.ai, the Kimi apps, Kimi Work, Kimi Code and the Kimi API. Turn it on in Kimi Enterprise or choose Kimi Business for your team.