Fal.ai
Developer API platform for running image, video, and audio generation models (Flux, SDXL, Whisper, and more) at low latency. Popular as a serverless GPU layer for multimodal AI apps, with a clean Python/JS SDK and pay-per-use pricing.
OpenAI API
API access to GPT-4o, o1, and other OpenAI models including embeddings and image generation. The most widely used LLM API in production.