Good new first: Sol is a smart, efficient, and a significant step forward. It is the same price as GPT-5.5. Also launching in the GPT-5.6 family is Terra, with 5.5-level performance at half the price. Bad news: at the request of the US government, it is launching today in

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1. #1

   we had a significant security incident during evaluation of our models. we are sharing what we have learned so far. thanks to @huggingface for the partnership on this.

   Sam AltmanSam Altman @sama · 2026-07-21
2. #2

   this is cool:

   Sam AltmanSam Altman @sama · 2026-07-17
3. #3

   i talk to chatgpt more than i type to it at this point new voice model really crossed a threshold

   Sam AltmanSam Altman @sama · 2026-07-16
4. #4

   we did not have our best last 12 months ever, which is mostly my fault, but we are about to have our best 12 months to date. the team is doing amazing work and i think you’ll be v…

   Sam AltmanSam Altman @sama · 2026-07-16
5. #5

   amazing to me that some people want the silent version

   Sam AltmanSam Altman @sama · 2026-07-15
6. #6

   5.6 sol growth is insane. the inference team has done heroic work to be able to support demand. we are going to move mountains to continue to scale, but it is possible there are s…

   Sam AltmanSam Altman @sama · 2026-07-14

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