OPN.ai is the open platform for AI: a hub for open models, fast open-weights inference, and developer tooling built on transparency instead of closed APIs.
Features
OPN.ai is the open platform for AI: a hub for open models, fast open-weights inference, and developer tooling built on transparency instead of closed APIs.
Discover, compare, and deploy open-weights models from one registry.
Serve open models at low latency and low cost on infrastructure tuned for throughput.
Ship with clean SDKs, an OpenAI-compatible API, and first-class local development.
Adapt open models to your data and deploy them without vendor lock-in.
Inspect weights, benchmarks, and licenses so you always know what you are running.
Run in our cloud or bring your own, and keep full control of models and data.
How it works
Browse the hub and choose the open model that fits your task and budget.
Point your existing code at our OpenAI-compatible endpoint and go.
Serve, fine-tune, and monitor open models in production without lock-in.
FAQ
Open-weights models across text, vision, and audio, plus custom models you bring to the platform.
Yes. Our endpoint is OpenAI-compatible, so most projects switch by changing a base URL and key.
Absolutely. Your prompts and fine-tunes stay yours, are never used to train shared models, and can run in your own environment.
Open-weights inference typically costs a fraction of closed APIs, and you pay only for what you use with transparent per-token rates.
Interested in the opn.ai domain?
Review the asking price, acquire the domain outright, or propose a joint venture.