OpenRouter has listed Ox Alpha, a new unattributed reasoning model, under its stealth provider namespace. The model is notable because OpenRouter currently shows zero-dollar prompt and completion pricing, a 1,048,576-token context window, and a maximum completion setting of 131,072 tokens in its public model data.

The service describes Ox Alpha as designed for coding, sustained agentic work, and production workloads. That makes the listing more than a curiosity for model watchers: if the preview remains available, developers can test long-horizon software tasks and multi-step reasoning through the same routing layer they use for other hosted models.

The owner remains undisclosed. OpenRouter's public page identifies the model as a stealth listing, while TechCrunch reported that OpenRouter described it as developed and operated by a third-party provider that chose to stay anonymous during the preview. Online speculation has pointed in several directions, including Chinese labs and Microsoft-related models, but no lab has confirmed ownership.

The conservative takeaway is that Ox Alpha is a live preview, not a formal model launch. Its provider, training lineage, and durability are still unknown. The verified facts are narrower but still relevant: OpenRouter is carrying a free, long-context reasoning model positioned for coding and agentic workloads, and the anonymity around it has made attribution part of the story.