OpenAI
LLM providersThe most widely adopted frontier-model provider — the usual default for a new AI project.
OpenAI provides the GPT family and related models through a mature developer API, with strong tool use, structured outputs, and a broad ecosystem of libraries and examples.
It is most teams' default first call: capable models, good documentation, and the widest pool of community knowledge to lean on when something goes wrong.
Where it's ideally used
A safe default to start with when you want capable models, mature APIs, and the deepest pool of examples and support.
Where it doesn't fit
A hosted US provider, so it needs scrutiny where data residency, vendor lock-in, or sending data off-premises are real constraints.