“Mythos-like hacking, open to all”: Industry reacts to OpenAI’s GPT 5.5

OpenAI launched GPT-5.5 and GPT-5.5 Pro, pitching better coding and harder-task performance.

Early testers said results can be stronger in real-world use, but outputs are often slower and use more tokens.

The rollout also drew complaints about delayed API access and higher pricing than previous models.

The release lands amid growing scrutiny of powerful AI tools for coding and cybersecurity.