Migrate · OpenAI · verified 15 Sep 2026
Migrate from Codex cloud to Rush
ChatGPT data export (up to 7 days to prepare, 24-hour download). Code already pushed stays on GitHub or GitLab.
Facts checked 15 September 2026. Prices and limits move. Read the citations.
Off-ramp
The steps
- 01
Pushed branches and opened pull requests stay on GitHub or GitLab. Export ChatGPT data from settings if you want the task history (up to 7 days to prepare).
- 02
Keep AGENTS.md as it is; Codex reads it in a Rush run.
- 03
Connect your ChatGPT subscription or OpenAI key in Rush so the run bills your OpenAI account, as Codex cloud did.
- 04
Turn the environment's setup script into instructions the agent follows, or a step in AGENTS.md. Rush gives the agent the network while it works.
- 05
Install the Rush GitHub App on the repository in Settings, Integrations, GitHub. A run that needs no repository needs no GitHub.
- 06
Create an API key in the console under Developers, then start one run: POST /o/{org}/sessions with an agent (claude, codex or opencode) and the task as input. The same call is the create_session tool on the Rush MCP server.
- 07
Read the result: the pull request and its checks for code, or the report and files under artifacts. A run whose proof is missing ends needs_review, not completed.
Rush
Where Rush sits
Codex cloud to Rush keeps the agent and AGENTS.md. What moves is where you start it: from your code with an API key instead of ChatGPT.
Honest limits
Skip Rush if
- Codex cloud still does the job you bought it for. This page is the off-ramp, not a reason to leave.
- Rush runs three agents: Claude Code, Codex and OpenCode. It does not host an agent you wrote yourself.
- Repositories come through the Rush GitHub App. A GitLab or Bitbucket repository cannot be a run's repository yet.
- There is no self-hosted or customer-VPC deployment, and we do not publish a compliance report today.
- Compute is metered. Free includes 5 agent-hours a month and Pro 40, each with a weekly ceiling.
- You review the pull request. Rush does not merge for you.
FAQ
Questions people actually ask
What happens to my work on Codex cloud when I leave?
ChatGPT data export (up to 7 days to prepare, 24-hour download). Code already pushed stays on GitHub or GitLab.
Do I rewrite my instructions for Rush?
Not if they live in the repository. Claude Code reads CLAUDE.md and Codex and OpenCode read AGENTS.md from the checkout, so a file you commit travels with every run. Settings held only inside another product's UI have to be copied into one of those files.
Cluster
Keep reading
Citations
Sources
Every factual claim on this page traces to one of these URLs. Retrieval date is 15 September 2026 unless the source prints an earlier published date.
- [1] Rush, “Rush product requirements”, retrieved 2026-09-15. https://getrush.ai/cloud
- [2] Rush, “Rush pricing (live contract on getrush.ai)”, retrieved 2026-09-15. https://getrush.ai/pricing
- [3] Rush, “Isolation, plainly”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/isolation
- [4] Rush, “Results and proof”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/results-and-proof
- [5] Rush, “Usage and billing”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/usage-and-billing
- [6] Rush, “Rush MCP server”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/mcp-server
- [7] Rush, “Automations”, retrieved 2026-10-17. https://getrush.ai/docs/concepts/automations
- [8] OpenAI / ChatGPT Learn, “Codex cloud”, retrieved 2026-09-15. https://learn.chatgpt.com/docs/cloud
- [9] OpenAI / ChatGPT Learn, “Cloud environments”, retrieved 2026-09-15. https://learn.chatgpt.com/docs/environments/cloud-environment.md
- [10] OpenAI, “Pricing | ChatGPT Learn”, retrieved 2026-09-15. https://learn.chatgpt.com/docs/pricing
- [11] TechCrunch, “OpenAI launches Codex, an AI coding agent, in ChatGPT”, published 2025-05-16. https://techcrunch.com/2025/05/16/openai-launches-codex-an-ai-coding-agent-in-chatgpt/
Next
Run the next Task on Rush
Connect a repository. Pick Claude Code, Codex, or OpenCode. Review the PR.