Founded by the team behind PyTorch and backed by AMD, Atreides, Benchmark Capital, Index Ventures, Lightspeed, NVIDIA, Sequoia Capital, and TCV, Fireworks powers production AI with hundreds of state-of-the-art open models across text, image, embedding, audio, and multimodal workloads. The surface areas include inference, training, nexus, and the product around them: signup, docs, API and playground flows, model choice, errors, pricing, and the path from first request to a workflow someone relies on.