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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: a 3T-class open-weight model with a 1M-token context and a Highspeed mode that answers 2-3x faster.
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Why Teams Reach for Kimi K3.1 Pro
The first 3T-class open-weight model in the K3.1 series, with a 1M-token context and a Highspeed variant.
- 3T-Class Open Weights, 1M-Token ContextThe first model in the K3.1 series and the most capable 3T-class open-weight release so far, carrying a 1-million-token window across coding, 3D and finance work.
- Highspeed Variant at 2-3x SpeedKimi K3.1 Pro Highspeed returns answers 2-3x faster than the standard model for more responsive back-and-forth, and both variants are available today.
- Joint RL Across Hundreds of DomainsA post-trained Kimi K3 with far larger post-training compute, tuned end to end — RL framework, long-context inference, sandboxes and rollout scheduling — for steady returns.
How to Use Kimi K3.1 Pro
Three routes into K3.1 Pro, from the web app and desktop tools to the API and enterprise rollout.
What Kimi K3.1 Pro Can Do
Coding, long-horizon autonomy, 3D modeling, financial research, accuracy work and benchmark standing for K3.1 Pro.
End-to-End Coding and Game Engines
K3.1 Pro covers quick fixes in real codebases and full-project builds, working across Unity, Unreal Engine and Godot with stronger typography, animation and front-end polish.
Long-Horizon Autonomy and Self-Debugging
In an internal walking-simulator test across 167 missions and 420 reviews, K3.1 Pro diagnosed problems and corrected 36 shoulder moment-arm errors before retraining its controller.
3D Modeling and Parametric CAD
K3.1 Pro scores 92.7% on BenchCAD with tools and writes and runs Blender and CAD scripts directly — no MCP connectors — for parts, buildings and custom furniture.
Financial Workflows and Auditable Research
A 64.4 on OfficeQA Pro v2, plus gains over K3 of 7.2 points in financial modeling, 11.6 points in research and about 4.2x in simulated business operation.
Lower Hallucination on Real Tasks
Targeted work cut claim-level hallucination on Kimi Hallu Bench Hard from 23.4% to 8.3%, with responses carrying at least one factual error at 42.4% of the old rate.
Benchmark Standing and Safer Open Weights
K3.1 Pro reaches 65.7% on Terminal-Bench 4.0, ahead of GPT-6 Astra at 58.2%, while cyber-related data removal took xdev-bench-hard from 90.5% to 81.0%.
Kimi K3.1 Pro — FAQ
Common questions about Kimi K3.1 Pro, from context size and availability to benchmark results.
How large is Kimi K3.1 Pro's context window?
K3.1 Pro ships with a 1-million-token context window. It is the first model in the K3.1 series and the most capable 3T-class open-weight model released to date.
What is the difference between K3.1 Pro and K3.1 Pro Highspeed?
Highspeed delivers 2-3x the speed of the standard K3.1 Pro for more responsive interactions. Both are available today on Kimi.ai, Kimi Work, Kimi Code and the Kimi API.
When will the full model weights be released?
Full weights for Kimi K3.1 Pro will be released by Nov 4, 2026. The open-weight release follows stated principles, including keeping offensive cyber capability below the frontier.
How does K3.1 Pro compare with proprietary frontier models?
Across coding, agentic and knowledge benchmarks it matches or approaches the strongest proprietary models: 65.7% on Terminal-Bench 4.0 versus 58.2% for GPT-6 Astra and 66.4% for Claude Opus 5.5, plus 92.7% on BenchCAD with tools.
Is K3.1 Pro accurate enough for financial research?
It scores 64.4 on OfficeQA Pro v2 and improves on K3 in modeling and research, with claim-level hallucination down from 23.4% to 8.3% on Kimi Hallu Bench Hard — a deliberate stress test, not a daily-use error rate.
How do enterprise teams get access to Kimi K3.1 Pro?
Kimi Enterprise admins can enable K3.1 Pro for their organization; access is off by default at launch. Kimi Business adds enterprise-grade data privacy, member management and separated personal and org accounts.
Try Kimi K3.1 Pro Today
Kimi K3.1 Pro is live on Kimi.ai, the Kimi apps, Kimi Work, Kimi Code and the Kimi API. Enable it in Kimi Enterprise or subscribe to Kimi Business for your team.