OpenAI (ChatGPT)
External APIs

OpenAI offers the ChatGPT family and GPT models as SaaS, at the forefront for reasoning, code and multimodal capabilities. On-demand access, token-based billing, data subject to the vendor's policy. The platform uses it for non-sensitive innovation, as overflow from the local core.
Key points: ChatGPT and GPT · Reasoning and code · Token-based · Non-sensitive.
Models served: GPT-5.5, GPT-5 and GPT-5 mini, o-series reasoning models, GPT-4.1, plus image and audio
Location: United States, subject to the Cloud Act.