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OpenAI has sent out emails notifying API customers that its chatgpt-4o-latest model will be retired from the developer platform in mid-February 2026. Access to the model is scheduled to end on ...

The new GPT-5.5 Instant model will replace GPT-3.5 Instant as the default model for ChatGPT ...

Here’s what OpenAI has to say about GPT-5: Today we’re introducing GPT‑5⁠, OpenAI’s smartest, fastest, most useful model yet, and a major step towards placing intelligence at the center of every ...

GPT-5.5 lands seven weeks after the release of GPT-5.4, which arrived on March 5. OpenAI says the newest model “understands what you’re trying to do faster” and that it can “carry more of the work ...