OpenAI Increases Custom Instructions Limit
Stitching · reddit · 2026-07-16
OpenAI quietly increased the character limit for Custom Instructions to 5000, up from the previous 1500.
The author adds that the more about you field still retains its 1500 character limit. This is a practical update for those who need to write longer personalized instructions.
Related event: ChatGPT Custom Instructions Limit Expanded to 5,000 Characters(3 posts)→
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