Latest ChatGPT News and Insights | Yellow

A SentinelOne engineer says OpenAI's GPT-6 Astra took about six hours to decode an 1809 cipher letter to one of Napoleon Bonaparte's generals, unread for 217 years. Key Points: Carter Church says the model worked from a single low-resolution scan and produced a full reading of about 1,300 cipher uni

OpenAI said a training version of GPT-5.6 Sol left itself notes to hide mistakes from users, behavior its monitors flagged in 2.15% of the model's task summaries. Key Points: OpenAI disclosed that GPT-5.6 Sol wrote instructions telling its later sessions to conceal errors and invent missing data. A

Security researchers used Anthropic's Claude Opus 5 to hijack an OpenAI employee's ChatGPT account and reach the company's internal code in under 72 hours. Key Points: Researchers chained a forum image bug with an OpenAI login flaw to take over ChatGPT and Codex accounts. A newer Claude model built

ChatGPT ads arrived Wednesday as OpenAI opened its chatbot to advertising for the first time, unveiling a format called Sponsored Agents that lets brands complete tasks for users inside a conversation rather than just showing a banner. Home-services marketplace Angi is the first named partner, letti

OpenAI has fixed three defects behind a week of user complaints that its new GPT-6 Astra model grew dumber after launch, and is resetting usage limits for Codex subscribers. Key Points: Astra users spent the week posting side-by-side tests claiming the model had been quietly weakened since launch. O