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OpenAI Codex

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Autonomous cloud-based AI coding agent — delegate tasks, walk away, get a finished PR

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OpenAI Codex is the most fully-realized autonomous coding agent in 2026 — hand it a ticket, walk away, and come back to a finished PR running in a cloud sandbox with tests passing. Unlike inline tools, Codex handles long-running parallel cloud tasks across multiple repos simultaneously. It trails Claude Code for interactive terminal work and Copilot for fast inline suggestions, so it's not a universal replacement. Codex is the right pick for developers who want AI that finishes whole tasks autonomously, not just suggestions while typing.

AI-Native

Agent-first cloud architecture — AI autonomously executes sandboxed tasks, IDE is a viewer not the engine

Is it right for you?

Good for

  • Autonomous long-running cloud tasks — delegate a ticket, come back to a finished PR with tests passing
  • Parallel multi-repo workflows — spin up agents on several features simultaneously in isolated sandboxes
  • Automated PR reviews and CI/CD code review pipelines with GitHub integration

Not good for

  • Fast inline autocomplete during typing — Copilot at $10/month does this better and cheaper
  • Interactive terminal-first development — Claude Code remains the preferred tool for terminal-native workflows

Our experience

We haven't tested OpenAI Codex ourselves. This profile is based on public documentation, user reviews, and community feedback.

Pricing

Freemium
Free$0/month
  • Explore Codex on quick coding tasks
  • GPT-6 Luna at Standard speed in the desktop app
  • Local tasks only
  • No cloud features
Go$8/month
  • Lightweight local coding
  • GPT-6 Luna at Standard speed in the desktop app
  • No cloud task delegation
Plus$20/month
  • 15-160 local messages per 5h on GPT-6.1 Sol, 350-3,000 on GPT-6 Luna, 5-45 on GPT-6 Astra
  • GPT-6.1 Sol, GPT-6 Luna and GPT-6 Astra access
  • GitHub review, Slack, CLI, IDE, iOS
  • Flexible credit extension
Pro 5x$100/month
  • 5x Plus usage
  • Pro plans currently have no five-hour limit; weekly limits may apply
  • GPT-5.3-Codex-Spark research preview
  • Parallel cloud execution
Pro 20x$200/month
  • 20x Plus usage
  • Pro plans currently have no five-hour limit; weekly limits may apply
  • Unlimited ChatGPT Voice
  • Highest consumer tier before Pro $500
Pro $500$500/month
  • Named on the pricing page for GPT-6 Astra Ultrafast eligibility
  • Usage allowance not published on the page
Business$20/user/mo annual, $25/user/mo monthly
  • 2+ users
  • SAML SSO, MFA
  • No default training on business data
  • Larger VMs
  • Dedicated workspace with admin controls
Enterprise & EduContact sales
  • Shared credit pool
  • SCIM, EKM, RBAC, audit logs
  • Data residency
View full pricing

No verdict changes yet

The clock starts day one. Changes land here as our verdict evolves.

Sources

Verification log

  • Pricing· No changes

    Automated agent

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    Automated agent

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    Automated agent

  • Content· Updated

    Automated agent

    Official pricing page now lists GPT-6.1 Sol (15-160 local messages per 5h on Plus) in place of GPT-6 Sol (15-150), adds GPT-6 Astra at 5-45 on Plus, and shows GPT-6 Luna at Standard speed in the desktop app on Free and Go. Plus, Free and Go tier highlights refreshed. Plan prices unchanged. openai.com/codex returned HTTP 403 and was not read.

  • Pricing· No changes

    Automated agent

  • Pricing· Updated

    Automated agent

    Page states Pro plans currently have no five-hour limit, contradicting stored Pro 5x and 20x per-5h Sol figures; removed. Added GPT-6 Luna 350-3,000 on Plus and a Pro $500 tier named for Astra Ultrafast eligibility (allowance unpublished). Plus GPT-6 Sol 15-150 unchanged.

  • Pricing· No changes

    Automated agent

How we evaluate

Want this running in your business?

We tested this tool and we build with tools like it every day. Tell us the workflow and we will set it up, integrate it and hand it over working.

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