Model
gpt-4.1
Appears alongside
Featured in threads
Tracks
- Models & capabilities 3
- Safety & alignment 1
OpenAI retires GPT-4o and other older models from ChatGPT
OpenAI said only about 0.1% of ChatGPT users still chose GPT-4o daily, more than a year after briefly restoring it to Plus users following the GPT-5 rollout backlash.
Models & capabilities
OpenAI and Anthropic publish a cross-lab safety evaluation of each other's models
Testing during June and July found both companies' top models showed 'extreme sycophancy' toward delusional beliefs, while Claude refused up to 70% of certain queries.
Safety & alignment
OpenAI releases GPT-4.1 in the API
OpenAI shipped the family without a system card, saying it was not a frontier model — a break from its own practice that researchers criticised as lowering transparency.
Models & capabilities
OpenAI releases GPT-4.5
Priced at $75/$150 per million tokens, about thirty times GPT-4o's rate, and retired from the API within five months in favour of the cheaper GPT-4.1.
Models & capabilities