OpenAI Just Upgraded ChatGPT's Default Model—Here's What GPT-5.5 Instant Actually Does
In brief GPT-5.5 Instant replaces GPT-5.3 Instant as ChatGPT’s default model starting today, rolling out to all users for free. The model produced 52.5% fewer...
Tag : GPT5.5
OpenAI's GPT-5.5 Matches Claude Mythos in Cyberattack Capabilities: AI Security Institute
In brief GPT-5.5 can autonomously execute sophisticated cyberattacks, completing a 32-step corporate network simulation and cracking a 12-hour security puzzle in just 10 minutes. Offensive...
OpenAI Releases GPT-5.5, a New Model Built to Complete Full Work Tasks on Its Own
OpenAI released GPT-5.5 on April 23, its newest frontier model and the company’s most capable agentic system to date, designed to accept a messy multi-part...
OpenAI Releases GPT-5.5: Faster, Smarter—And Pricier
In brief GPT-5.5 launches today for Plus, Pro, Business, and Enterprise users in ChatGPT and Codex, with API access coming soon at $5/M input tokens...