OpenAI's GPT-5.5 is here, and it's no potato: narrowly beats Anthropic's Claude Mythos Preview on Terminal-Bench 2.0

So when it comes to models that the general public can access, GPT-5.5 has retaken the crown for OpenAI, achieving the ...
The Next Web

OpenAI launches GPT-5.5, its first fully retrained base model since GPT-4.5

OpenAI launches GPT-5.5, its first fully retrained base model since GPT-4.5, targeting enterprise with agentic coding, computer use, and knowledge work ...