AI Model Release Tracker

Kimi K3.1 ProOpen Weight

Released

Kimi K3.1 Pro is an AI model released by Moonshot AI on Friday, Oct 23 2026, 99 days after Kimi K3. It is an open-weight model — the trained weights are available to download and run. It is a 2.8T parameterThe learned values that shape how a model responds. B means billion and T means trillion. For mixture-of-experts models, the total count is larger than the number active for each token. Parameter count alone does not measure quality. model with a 1M token context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider.. Benchmark results (shown below) cover Humanity's Last Exam, Chartography, BenchCAD, Terminal-Bench 4.0, Terminal-Bench-Science 0.1, and GDP.PDF.

Benchmarks

Coding

BenchCADCAD programming — Can the AI do mechanical design as code? Given a drawing or a description of an industrial part — a gear, a spring, a drill bit — it has to write or edit the parametric CAD program that builds it, and the program is run to check the shape really comes out right. Higher is better.
92.7%
#2 of 2

Terminal & CLI

Terminal-Bench 4.0Agentic terminal coding — Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Version 4.0 recalibrated how much time, CPU and memory each task gets, removed eight tasks and fixed nineteen, so fewer runs fail for reasons that have nothing to do with the model. Scores are not comparable with earlier versions. Higher is better.
65.7%
#3 of 30
Terminal-Bench-Science 0.1Agentic scientific computing — The same command-line setup as Terminal-Bench, pointed at scientific work: the AI has to drive research tooling and computational workflows through to a result, rather than administer a machine. Version 0.1 is the first release of the task set, and scores run lower than on the general board. Higher is better.
38.1%
#6 of 8

Reasoning & science

Humanity's Last ExamMultidisciplinary reasoning — Humanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better.
70%with tools
#1

Multimodal

ChartographyChart tasks — A chart-centred test run with tools available to the AI, reported separately from the chart-reading benchmarks above it. Higher is better.
90.2%with tools
#1
GDP.PDFDocument comprehension — Real professional PDFs — filings, reports, technical documents — with questions an expert in that field would ask. Tests whether the AI reads the page as a document, layout and figures included, rather than as loose text. Higher is better.
34.6%
#2 of 6

Compare Kimi K3.1 Pro with

Kimi K3.1 Pro

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Frequently asked questions

Kimi K3.1 Pro was released by Moonshot AI on Friday, Oct 23 2026.

All Moonshot AI releases

14 tracked

2023

1 release
Kimi Chat
Oct 9 2023