OpenAI is going public and overhauling ChatGPT at the same time

The company said Monday it has confidentially filed for a US initial public offering, joining rival Anthropic in lining up ...
9to5Mac

OpenAI releases ‘code red’ GPT-5.2 update to ChatGPT: ‘most capable model series yet’

OpenAI has officially announced its GPT-5.2 upgrade to ChatGPT. This is the so-called “code red” reaction to Google Gemini that OpenAI calls its “most capable model series yet for professional ...
Mashable

OpenAI’s GPT-5.5 vs Claude Opus 4.7: Which is better?

OpenAI released its latest model, GPT-5.5, on April 23, just a week after Anthropic introduced Claude Opus 4.7. As the two leading models from the two leading AI labs, we wanted to see how the new ...

OpenAI rolls out GPT-5.5 Instant with improved accuracy, sets it as ChatGPT default

GPT-5.5 Instant replaces the older default model with upgrades in reasoning, personalisation, and transparency features.
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OpenAI makes GPT-5.5 Instant ChatGPT’s default with 52% fewer hallucinations

OpenAI has rolled out GPT‑5.5 Instant as ChatGPT’s default model, replacing GPT‑5.3 Instant for all users. Internal tests show it produces 52.5% fewer hallucinated claims in high‑stakes fields ...

OpenAI Updates GPT-5.5 Instant for Response Style and Quality

Four weeks after its initial release, OpenAI has shipped a new version of its GPT-5.5 Instant AI model to address some issues.