Devin vs OpenAI Codex
Devin and OpenAI Codex side by side: what each one is, verified plan pricing and install commands where we have them, and the full review of each.
Devin
Cognition Labs' autonomous software engineer. Handles full tasks end-to-end - reads docs, writes code, runs tests, and submits PRs in an isolated sandbox.
OpenAI Codex
AgentOpenAI's coding agent for terminal, cloud, IDE, GitHub, Slack, and Linear workflows. Reads repos, edits files, runs commands, and returns reviewable diffs.
At a glance
| Field | | |
|---|---|---|
| Category | AI Coding | AI Coding |
| Website | devin.ai | developers.openai.com |
| Pricing | Free - $0: light quota to code with agents, limited model availability, unlimited Tab and inline edits; Pro - $20/mo: increased quotas, full model availability, free use of SWE-2, Devin Cloud agents, extra usage at API pricing; Max - $200/mo: everything in Pro with significantly higher quotas; Teams - $80/mo for the team plan plus $40/mo per full dev seat, up to 200 users; Enterprise - contact sales: SAML/OIDC SSO, VPC deployment, dedicated account team | Free - $0 and Go - $8/mo: GPT-6 Luna at Standard speed in the desktop app, subject to rollout; Plus - $20/mo: Codex on the web, in the CLI, IDE extension, and iOS, plus cloud code review and Slack; GPT-6.1 Sol and GPT-6 Luna; Pro - $100, $200, or $500/mo: everything in Plus, currently no five-hour limit; Ultrafast mode on Pro $500; Business - $20/user/mo billed annually ($25 monthly), 2+ users; Enterprise and Edu - contact sales; API key - pay per token at OpenAI API rates; no cloud features such as GitHub code review or Slack |
| Install | curl -fsSL https://cli.devin.ai/install.sh | bash or brew install --cask devin-cli or irm https://static.devin.ai/cli/setup.ps1 | iex | curl -fsSL https://chatgpt.com/codex/install.sh | sh or npm install -g @openai/codex or brew install --cask codex |
| Models | Devin supports the latest Anthropic, OpenAI, Google, and Cognition models plus open models like DeepSeek, Kimi, and GLM. Cognition recommends Fusion, which pairs a frontier lead model with a cheaper sidekick, and SWE-2, its latest model, is in the agent selector. In the CLI you pick with --model or /model, using short names like opus, sonnet, swe, codex, and gemini. | GPT-6.1 Sol is the recommended model for complex coding and the CLI default, with GPT-6 Astra, GPT-6 Sol, and GPT-6 Luna also available and GPT-5.6 Sol, Terra, and Luna kept during the rollout. Switch with /model in a session, codex --model (or -m) at launch, or a model entry in config.toml; API-key sessions get whatever models the key can access. |
| Last verified | October 25, 2026 | October 17, 2026 |
In Depth
Devin
Devin is an autonomous AI software engineer from Cognition Labs. It operates in a full cloud development environment with a browser, terminal, and code editor. Given a task, Devin reads documentation, plans an approach, writes code across multiple files, runs tests, debugs failures, and submits pull requests - all autonomously. It handles long-running tasks (hours, not minutes) and can work in parallel on multiple tasks. It's positioned as a virtual teammate rather than a coding assistant. Cognition sells it on Free, Pro, Max, Teams, and Enterprise plans, and the same account covers Devin Desktop (formerly Windsurf) and the Devin CLI. It remains one of the most ambitious autonomous coding agents you can use.
OpenAI Codex
Codex is OpenAI's autonomous coding agent for local CLI work and cloud task delegation. It can inspect a repository, make multi-file edits, run tests, and create reviewable diffs or pull requests depending on the workflow. Use the CLI when local services and immediate feedback matter. Use cloud tasks when branch isolation, async completion, and GitHub review loops matter more.
FAQ
Answers taken from each tool's verified fact sheet, with the date it was last checked.
How much does Devin cost?
As of October 25, 2026: Free - $0: light quota to code with agents, limited model availability, unlimited Tab and inline edits; Pro - $20/mo: increased quotas, full model availability, free use of SWE-2, Devin Cloud agents, extra usage at API pricing; Max - $200/mo: everything in Pro with significantly higher quotas; Teams - $80/mo for the team plan plus $40/mo per full dev seat, up to 200 users; Enterprise - contact sales: SAML/OIDC SSO, VPC deployment, dedicated account team. Source: Devin plans and pricing, Devin CLI quickstart, Devin CLI models, Devin release notes.
How do I install Devin?
Official install commands as of October 25, 2026: curl -fsSL https://cli.devin.ai/install.sh | bash or brew install --cask devin-cli or irm https://static.devin.ai/cli/setup.ps1 | iex.
Which models does Devin use?
As of October 25, 2026: Devin supports the latest Anthropic, OpenAI, Google, and Cognition models plus open models like DeepSeek, Kimi, and GLM. Cognition recommends Fusion, which pairs a frontier lead model with a cheaper sidekick, and SWE-2, its latest model, is in the agent selector. In the CLI you pick with --model or /model, using short names like opus, sonnet, swe, codex, and gemini.
How much does OpenAI Codex cost?
As of October 17, 2026: Free - $0 and Go - $8/mo: GPT-6 Luna at Standard speed in the desktop app, subject to rollout; Plus - $20/mo: Codex on the web, in the CLI, IDE extension, and iOS, plus cloud code review and Slack; GPT-6.1 Sol and GPT-6 Luna; Pro - $100, $200, or $500/mo: everything in Plus, currently no five-hour limit; Ultrafast mode on Pro $500; Business - $20/user/mo billed annually ($25 monthly), 2+ users; Enterprise and Edu - contact sales; API key - pay per token at OpenAI API rates; no cloud features such as GitHub code review or Slack. Source: Codex pricing, Codex changelog, Models, Codex CLI docs, openai/codex README.
How do I install OpenAI Codex?
Official install commands as of October 17, 2026: curl -fsSL https://chatgpt.com/codex/install.sh | sh or npm install -g @openai/codex or brew install --cask codex.
Which models does OpenAI Codex use?
As of October 17, 2026: GPT-6.1 Sol is the recommended model for complex coding and the CLI default, with GPT-6 Astra, GPT-6 Sol, and GPT-6 Luna also available and GPT-5.6 Sol, Terra, and Luna kept during the rollout. Switch with /model in a session, codex --model (or -m) at launch, or a model entry in config.toml; API-key sessions get whatever models the key can access.
