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This stealth model is developed and operated by a third-party model provider. Prompts and completions for this model are retained by the provider and are not used for training; all other use is governed by the Stealth Model Terms(opens in new tab).

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Ox Alpha

stealth/ox-alpha

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Ox Alpha is a reasoning model designed for coding, sustained agentic work, and production workloads. It is suited for long-horizon software engineering, complex reasoning, and workflows that combine text with visual context.

Ox Alpha is a stealth model. It is developed and operated by a third-party provider who has chosen to remain anonymous during this preview. OpenRouter routes requests to it and is not its developer, owner, or provider. Prompts and completions are retained by the provider and are not used for training; all other use is governed by the Stealth Model Terms(opens in new tab).

Modalities

Price

Free

Context

1M

Released

Aug 20, 2026

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About Ox Alpha

OpenRouter makes Ox Alpha by Stealth available through a unified, OpenAI-compatible API using the model ID stealth/ox-alpha. It is served by Stealth.

Ox Alpha accepts text, images and video and returns text. It has a 1,048,576-token context window and a maximum output of 131,072 tokens.

It was released on August 20, 2026.

Frequently asked questions

Ox Alpha is a reasoning model designed for coding, sustained agentic work, and production workloads. It is suited for long-horizon software engineering, complex reasoning, and workflows that combine text with visual context. Ox Alpha is a stealth model. It is developed and operated by a third-party provider who has chosen to remain anonymous during this preview.

Yes. The pricing shown on this page for Ox Alpha is zero, so you are not charged for prompt or completion tokens.

Ox Alpha has a 1,048,576 token context window. It supports up to 131,072 completion tokens.

Yes. Ox Alpha accepts tools and tool_choice for function calling. It supports response_format for JSON output, without JSON-schema enforcement.

Ox Alpha accepts text, images and video as input and returns text.

Ox Alpha was released on August 20, 2026.