AI REASONING
Ask the hard ones — maths, logic, code, anything with steps — and a reasoning model works the problem through on your own device, showing its chain-of-thought in a Thinking panel you can open or ignore. Private, offline once the model is downloaded, no clutter.
Get it on Microsoft Store See what it does ↓
Free to start • On Windows • The local model works offline
Ask a question and a reasoning model works it through step by step on your own device — with its chain-of-thought in a panel you can open or ignore, and nothing else in the way.
The model picker shows reasoning-only models — ones that work a problem through internally before answering, instead of guessing in one pass. That makes them noticeably stronger where the path to the answer matters.
Multi-step maths, logic puzzles and deductions, code — finding bugs, explaining failures, planning an approach — and any multi-step task that needs a plan or ordered steps.
The model's chain-of-thought appears above the final answer in a panel you can expand to follow and check its working, or leave collapsed to just read the conclusion. Great for spotting where a step went wrong.
Both the thinking and the answer appear as the model produces them, so you can watch it reason in real time and Stop early once it's on the right track.
Because step-by-step answers run long, AI Reasoning automatically gives reasoning replies a larger default reply-length budget, so a long chain-of-thought doesn't get cut off mid-thought. You can raise it further if you ever need to.
A free on-device reasoning model — DeepSeek R1 Distill 1.5B — ships ready to go, auto-selected and warmed up on first launch. No setup, no account, no sign-in.
With the local model the AI runs on your machine — your messages aren't uploaded, and it keeps working with the network off. Conversations are stored encrypted at rest, and no account is needed for the free tier.
Multiple saved conversations, find-in-chat and search-across-chats, and context controls for reply length and creativity. No tools, web, documents, folders or personas to wade through — just reasoning chat done cleanly.
Start free with the bundled reasoning model; the catalog updates without an app re-release. Pro unlocks larger, more capable local reasoning models and cloud providers for the hardest problems — the tier gates only the model.
A clean chat that shows its thinking: a collapsible chain-of-thought, your choice of reasoning model, simple per-chat controls, and private encrypted history.
Ask a hard one — the answer streams in with its working.
A picker filtered to reasoning models — free DeepSeek R1 by default.
Context controls — reply length and creativity, per chat.
Private by design — encrypted history and settings.
State the problem clearly — maths, logic, code or any multi-step task. The free reasoning model downloads once on first launch, then runs offline.
The chain-of-thought and the answer stream in together. Expand the Thinking section to follow the reasoning, or leave it collapsed and just read the conclusion — and Stop early once it's there.
Open the working to verify each step. Every chat is saved encrypted on your device, so you can search across them all or back them up later.
When a question needs working out — and needs to stay private — AI Reasoning brings a step-by-step model to your machine instead of sending your problem to the cloud.
Work through problems with a model that shows every step, so you can check the logic and learn the approach — not just copy an answer.
Debug, explain why something fails and plan an implementation with a model that reasons out loud — all on your own device.
Multi-step problems, deductions and consistency checks, with the working laid out so you can verify each step.
A self-contained reasoning chat that stays on your device — a fit for privacy-conscious users and offline or air-gapped environments.
Get AI Reasoning now from the Microsoft Store on Windows, with a headless CLI for power users and automation. Editions for macOS, Linux, the browser and mobile (Android and iOS) are planned.
Free gives you the complete app — the Thinking section, the larger reply budget, saved chats, find & search, context controls, encrypted history and backup & restore — on a capable on-device reasoning model, DeepSeek R1 Distill 1.5B, with no time limit or nag screens. Pro simply unlocks larger local reasoning models and optional cloud providers for the hardest problems; the tier gates only the model, so no feature is ever locked away.
Students, educators, researchers, non-profits and other qualified users can apply for a free 12-month Pro licence.
Free to start, on-device by design. Get AI Reasoning on Windows from the Microsoft Store, or read the plans first.