🚨 AI Alert — June 25, 2026

OpenAI Retires GPT-4.5 from ChatGPT — June 27 (48-Hour Deadline)

OpenAI confirmed GPT-4.5 is being retired from ChatGPT on June 27, 2026. Launched in February, it lasted only 4 months — one of the shortest lifespans in OpenAI's history. Superseded by the GPT-5 family (GPT-5.5, GPT-5.5 Pro, GPT-5.5 Instant).

Note: API endpoint is unaffected for now, but prepare for eventual sunset.

Why you should care:

• Automation/scripts pinning \gpt-4.5\ will break on June 27


• Prompts calibrated for GPT-4.5 may need retuning for GPT-5.x


• GPT-5 models generate more verbose responses — tighten system prompts


• o3 also retiring August 26, 2026

Quick migration:
\\\python

Before (breaks June 27):

model = "gpt-4.5"

After:

model = "gpt-5.5-instant" # cheaper, faster

or

model = "gpt-5.5-pro" # higher quality
\\\

🔗 OpenAI Release Notes | Migration Guide