ChatGPT-4o

ChatGPT-4o API endpoint deprecation slated for Feb 17, 2026

An OpenAI community thread flags the planned deprecation of the ChatGPT-4o API endpoint on Feb 17, 2026, with user feedback highlighting migration and compatibility concerns—start planning for replacements and breakage now ([Feedback on Deprecation of ChatGPT-4o Feb 17, 2026 API Endpoint](https://community.openai.com/t/feedback-on-deprecation-of-chatgpt-4o-feb-17-2026-api-endpoint/1372477#post_20)[^1]). For backend/data pipelines, inventory where 4o is used, pin model versions, and run dual-write/dual-run evaluations to validate behavior, latency, and cost before switching.