Skip to content
Not available in this workspace
OpenRouterOpenRouter
© 2026 OpenRouter, Inc

Product

  • Chat
  • Rankings
  • Benchmarks
  • Apps
  • Discover
  • Models
  • Collections
  • Providers
  • Pricing
  • Enterprise
  • Labs

Company

  • About
  • Blog
  • Careers
    Hiring
  • Privacy
  • Terms of Service
  • Trust Center
  • Support
  • Works With OR
  • Data
  • Brand

Developer

  • Documentation
  • API Reference
  • Developer Platform
  • Status

Connect

  • Discord
  • GitHub
  • LinkedIn
  • X
  • YouTube

This stealth model was developed and operated by ZAI, revealed to be ZAI GLM-5.3-Flash(opens in new tab). Prompts and completions for this model were retained by the provider and are not used for training; all other use is governed by the Stealth Model Terms(opens in new tab).

Favicon for stealth

Ox Alpha

stealth/ox-alpha

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

Context

1M

Released

Aug 20, 2026

ActivityFAQExplore

Activity

Token volume and request traffic to this model over time.

Explore more models

AI Models with Vision: Multimodal LLMs for Image UnderstandingCollectionAI Model RankingsRanking

Frequently asked questions

Ox Alpha was revealed to be ZAI GLM-5.3-Flash, which can be used here: https://openrouter.ai/z-ai/glm-5.3-flash(opens in new tab)

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.

Ox Alpha has a 1,048,576 token context window.

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

Ox Alpha was released on August 20, 2026.