Warp: Sign In with ChatGPT to Use Your Subscription in the Agent
WarpWarp added Sign in with ChatGPT, letting users link their ChatGPT plan and spend its included Work and Codex usage on requests from the Warp Agent in the terminal and the Warp Agent CLI. The feature was built in partnership with OpenAI and launched alongside OpenAI's DevDay announcement of 16 launch partners. Users enable it under Settings > Agents > Warp Agent > Custom Inference and can monitor and cap usage from their ChatGPT settings.
Key Takeaways
- Sign in with ChatGPT lets Warp users fund Warp Agent requests with the Work and Codex usage already included in their ChatGPT plan, with no separate API key needed.
- Warp is one of 16 launch partners for OpenAI's Sign in with ChatGPT program announced at DevDay on September 29, 2026, alongside OpenCode, Devin, Amp, Notion and Vercel.
- The feature is enabled under Settings > Agents > Warp Agent > Custom Inference and works in both the Warp terminal and the Warp Agent CLI.
- Spending is governed from ChatGPT settings, where users can set per-app caps, and usage stops at the cap rather than falling back to another billing source.
- Warp keeps subscription state server-authoritative, so the plan status shown in Warp tracks what OpenAI reports.
- The change fulfils a long-standing community request for ChatGPT Plus/Pro OAuth support in Warp, removing the need to pay twice for OpenAI model access.
Sources & Mentions
3 external resources covering this update
OpenAI makes 'Sign in with ChatGPT' a way to use your subscription in third-party developer tools
The New Stack
OpenAI makes 'Sign in with ChatGPT' a way to use your subscription in third-party developer tools
daily.dev
Sign in with ChatGPT for developers: the OAuth flow, plan usage, and what it means for your API bill
Dev.to
Use Your ChatGPT Plan Inside Warp
Warp introduced Sign in with ChatGPT, a new way to power the Warp Agent with an existing ChatGPT subscription instead of paying separately through an API key or Warp credits. The feature shipped in the 2026.09.23 release (v0.2026.09.23.14.34) and was announced publicly on September 29, 2026, alongside OpenAI's DevDay launch of Sign in with ChatGPT for third-party developer tools. Warp is one of the 16 launch partners named by OpenAI, alongside tools such as OpenCode, Devin, Amp, Notion and Vercel.
How It Works
Users sign in with their ChatGPT account, and requests from the Warp Agent then draw on the Work and Codex usage included in their ChatGPT plan. To turn it on, users open Settings > Agents > Warp Agent > Custom Inference and choose the ChatGPT sign-in option. The sign-in works in both the Warp terminal and the standalone Warp Agent CLI, and Warp's blog describes support for macOS, Linux and Windows.
Warp's implementation links the ChatGPT plan to the Warp account and keeps subscription state authoritative on the server side, so the plan status shown in Warp reflects what OpenAI reports rather than a locally cached guess.
Usage Visibility and Limits
Because usage is billed against the ChatGPT plan, monitoring happens in ChatGPT settings. OpenAI's launch lets subscribers set per-app caps there, and usage stops once the cap is reached instead of silently falling back to a partner's own billing. For Warp users this gives a clear ceiling on how much of a ChatGPT allowance the terminal agent can consume.
Models and Capabilities
Warp's announcement says the agent works with frontier GPT models and can understand a codebase, run commands, edit files and help review changes from the terminal. Signing in with ChatGPT changes how the usage is paid for, not what the Warp Agent can do.
Why It Matters
Developers who already pay for ChatGPT Plus or Pro previously had to buy API credits or Warp credits to use OpenAI models in Warp. The new option removes that duplicate spend and answers a long-requested feature: community requests had asked for ChatGPT Plus/Pro OAuth support to avoid bring-your-own-key costs.