GPT-5 family
OpenAI's frontier line.
Powers Codex and is selectable inside most agentic editors. The practical advantage is ecosystem reach: nearly every tool supports it, so it's the safest bet when you want portability across products.
Best for
Broad general capability and the widest third-party tool support.
Watch out for
Naming and tiers shift frequently — verify which variant your tool actually calls.
Using this and stuck anyway?
Knowing the tool isn't the same as finishing the project. If yours has stopped moving, we'll take a look at it.
Tell us what's broken