Anonymous 1M-context reasoning model available free through OpenRouter
Ox Alpha is a stealth AI model that appeared on OpenRouter and OpenCode on 20 August 2026. Its creator is unidentified, and OpenRouter routes requests to an anonymous third-party provider. The model accepts text, images and video, outputs text, and supports a 1,048,576-token context window with up to 131,072 tokens of output. Independent serving-layer forensics published on 22 August 2026 point to Zhipu AI's GLM-5.x infrastructure as the leading theory — a Java stack trace naming Zhipu's internal API classes, matching error-code dialects, 30/30 tokenizer alignment with GLM-5.3, and identical video-encoder behaviour to GLM-5V-Turbo. Zhipu has not confirmed this.
QUICK FACTS
Pricing
Free
Platforms
api, web
API
Yes
Open Source
No
Modalities
LLMs, IDEs & Coding Tools
Best For
Best for Anonymous Preview
Date Added
2026-08-20
WHY WE PICKED IT
The combination of a one-million-token context window, multimodal inputs, free pricing during the preview, and rapid adoption by coding-agent builders makes it worth tracking even before its creator is known. Within a day of launch, coding agents had pushed billions of tokens through it, suggesting real production interest rather than curiosity traffic. Preliminary independent DeepSWE testing also places it ahead of Claude Fable 5 and GPT-5.6 Sol on a small task subset.
STRENGTHS
✓1M-token context window
✓Free during the preview period
✓Accepts text, images and video
✓Strong early developer adoption for coding agents
✓Available through OpenRouter's OpenAI-compatible API
✓Tool calling and structured JSON output supported
LIMITATIONS
⚠Creator and provider are unidentified
⚠No official benchmarks or model card; available scores are small-sample community tests
⚠Prompts and completions may be retained by the anonymous provider
⚠Free preview was announced as roughly one week, ending around 27 August 2026, with post-preview pricing unknown
⚠Not safe for confidential or proprietary data
⚠Zhipu/GLM attribution is forensics-based and unconfirmed
GETTING STARTED
Open the Ox Alpha page on OpenRouter, sign in, and try the playground, or call model ID `stealth/ox-alpha` through the OpenRouter API. OpenCode also offers it through its model catalog with the /models command. Use non-sensitive tasks first.
VIDEO WALKTHROUGH
Embedded creator video selected for this tool.
BENCHMARKS
DeepSWE 10-task subset (community-run by Ben Davis) · ide-coding
80%
QUICK TIPS
1Do not paste proprietary code, passwords, or personal data into an anonymous preview
2Run the same task through a named frontier model for comparison
3Test on small, representative coding tasks before larger agent runs
4Watch OpenRouter and OpenCode for announcements about pricing and identity
5Treat benchmark claims from small community tests as preliminary
Yes, Ox Alpha offers an API for programmatic integration.
Q
What is Ox Alpha best for?
A
Ox Alpha is best for Anonymous Preview. Ox Alpha is a stealth AI model that appeared on OpenRouter and OpenCode on 20 August 2026. The combination of a one-million-token context window, multimodal inputs, free pricing during the preview, and rapid adoption by coding-agent builders makes it worth tracking even before its creator is known. Within a day of launch, coding agents had pushed billions of tokens through it, suggesting real production interest rather than curiosity traffic. Preliminary independent DeepSWE testing also places it ahead of Claude Fable 5 and GPT-5.6 Sol on a small task subset.
Q
What platforms does Ox Alpha support?
A
Ox Alpha supports api, web.
Q
Is Ox Alpha open source?
A
No, Ox Alpha is not open source.
Q
How do I get started with Ox Alpha?
A
Open the Ox Alpha page on OpenRouter, sign in, and try the playground, or call model ID `stealth/ox-alpha` through the OpenRouter API. OpenCode also offers it through its model catalog with the /models command. Use non-sensitive tasks first.
Q
How do I use Ox Alpha?
A
Ox Alpha is a large language model for text generation, analysis, and conversation. Access through the web interface. Enter prompts or questions to get responses. It excels at 1m-token context window.
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