OpenAI: Sign in with ChatGPT spends your plan in third-party tools
At DevDay (Sept 29), OpenAI expanded Sign in with ChatGPT so Plus/Pro subscribers can burn ChatGPT Work/Codex allowance inside Amp, Devin, Warp, OpenClaw, OpenCode, Notion, Vercel, and other launch partners—with per-app weekly caps that stop included usage instead of auto-billing the partner.