Devin: Detailed Introduction

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Devin: Detailed Introduction

Cognition’s AI software engineering product for planning, implementation, testing, and reviewable delivery.

• Audience: Developers and teams able to delegate scoped work and review code and tests.
• Cost: Free access and paid tiers are offered; the official Pro monthly price is $20 as of 2026-10-25.

Official account & key contributors on X

• Cognition — Devin team (@cognition)

Table of Contents

Getting started

1. What it is and who it is for
2. Access and setup: your first session

Usage and configuration

3. A concrete task and how to check it
4. Costs: software, models, and execution
5. Configuration and extensions

Limits and references

6. Permissions, data, and limitations
7. Frequently asked questions
8. Official references

Use the contents to jump to each section. If an in-page link does not respond, open it in a new tab.

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What it is and who it is for

In one sentence: Cognition’s AI software engineering product for planning, implementation, testing, and reviewable delivery.

Who it suits: Developers and teams able to delegate scoped work and review code and tests.

What you can do:

• Discuss a plan before delegating execution.
• Fix issues or implement scoped features in a repository.
• Review session records, tests, and pull requests.

Where to start: Open the web app from Devin or choose the desktop download. Connect code hosting and add the repository for cloud work.

Cost: Free access and paid tiers are offered; the official Pro monthly price is $20 as of 2026-10-25.

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Access and setup: your first session

Open the web app from Devin or choose the desktop download. Connect code hosting and add the repository for cloud work.

Use Ask to plan, then Agent to execute. Check repository, base branch, and selected agent. First session

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A concrete task and how to check it

Choose a small fix with tests rather than a whole-system request.

Example:

Fix the date-display issue, changing only the relevant component. Preserve interfaces, add a regression test, and open a PR with actual checks. Do not merge or deploy.

Review execution and diffs; rerun critical tests and inspect browser behavior where relevant.

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Costs: software, models, and execution

The current individual tiers are Free, Pro ($20/month), and Max ($200/month), with separate team and enterprise offers. Checked 2026-10-25. Pricing

Usage depends on task size, model, and reasoning; additional usage may be purchased. Older ACU articles do not necessarily describe every current surface.

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Configuration and extensions

Select repository and agent per session; knowledge, playbooks, and skills carry project conventions. Supply startup commands, tests, and acceptance criteria.

Desktop, local, and cloud environments differ. Local credentials, dependencies, or services are not automatically available remotely.

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Permissions, data, and limitations

Repository access, network availability, and test setup constrain results. Missing dependencies, inaccessible services, and ambiguous requirements cause retries.

Require evidence for reported checks. Treat editing, merging, and deployment as separate decisions. Review the data policy for cloud code processing.

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Frequently asked questions

How is it different from completion? It works on an end-to-end task rather than only suggesting a snippet.

Should I make tasks larger? Smaller, verifiable scopes expose failures more clearly.

Does closing a browser stop work? Check whether the session executes locally or in the cloud.

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Official references

• Website
• Product docs
• First session
• Pricing