News
OpenAI closes $122B round — largest private financing in history
OpenAI closed the round end of March at $852B valuation. Who got in, what Amazon, Nvidia and SoftBank pay, what it means.
GPT
GPT- und o-Reihe von OpenAI.
News
OpenAI swaps the ChatGPT default model — GPT-5.5 Instant replaces 5.3
Since 5 May 2026, GPT-5.5 Instant is the new default model in ChatGPT. -52.5% hallucinations on law, medicine, finance — and fewer emojis.
News
GPT-5.5 and GPT-5.5 Pro are live — and Pro costs six times the standard model
OpenAI shipped GPT-5.5 and GPT-5.5 Pro on 23 April 2026. Pro lists at $30/$180 per MTok — six times the standard price. What that means.
News
OpenAI opens GPT-5.5-Cyber — a model variant with relaxed safety filters for vetted defender teams
Since 7 May 2026: GPT-5.5-Cyber for vetted cybersecurity teams. Fewer refusals on vulnerability analysis, reverse engineering, detection engineering.