Increased custom instructions limit
2026-07-15
ChatGPT custom instructions now support up to 5,000 characters, up from 1,500.
Users can give ChatGPT more detailed preferences for tone, workflow, role, and response behavior without compressing their instructions.
Availability at release: Plus, Pro, Enterprise, Business, and Education users.
SourceOriginal record fields
Source: https://help.openai.com/en/articles/6825453-chat-gpt-release-notes
date:Date:start: 2026-07-15
date:Date:end: null
date:Date:is_datetime: 0
Who Gets It: Plus, Pro, Enterprise, Business, and Education users.
Category: Core Chat Experience
Why It Matters: Users can give ChatGPT more detailed preferences for tone, workflow, role, and response behavior without compressing their instructions.
What Changed: ChatGPT custom instructions now support up to 5,000 characters, up from 1,500.
Student Facing: __YES__
Lifecycle: Active
Update: Increased custom instructions limit