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)→
More from Models
- Grok 4.5 is now free inside Cursor, the popular AI coding IDE — mark_k · 2026-07-21
- GPT often converges on the same near-miss ideas in math problems — yacineMTB · 2026-07-21
- Eno Reyes says model distillation is basically unstoppable — LangChain · 2026-07-21
- Sakana says multiple diffusion models plus MCTS beat test-time scaling on coding and math — SakanaAILabs · 2026-07-21
- OpenAI hackathon project stalls as Codex struggles on voice, while Claude spots the issue — ColleenMBrady · 2026-07-21
- Kimi K3 lands exactly on China’s 2-year AI capability trend line — peterwildeford · 2026-07-21