Ox Alpha
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
Providers
Providers
This model is hosted by one provider. OpenRouter forwards every request to it directly — no routing decisions to make.
Pricing
The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.
Performance
Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).
Uptime
Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.
Apps
Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.
Activity
Token volume and request traffic to this model over time.
Quick Start
Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.
Explore models like this
AI Models with Vision: Multimodal LLMs for Image UnderstandingCollectionAI Model RankingsRanking
Latency / throughputP50
| Stealth | Free | Free | 3.87s | 33 tps | 100.00% |
| ----------------------------------------------------------------------------- | ---- | ---- | ----- | ------ | ------- |
Throughput
33tok/s
P50, best across providers
Latency
3.87s
P50, best provider
All locations
3 days
Uptime (3d)
99.99%
Availability (3d)
98.19%
Availability over the last 3 days
Last 72 hours
Availability 98.19%
3 Days Ago2 Days AgoYesterdayNow
Availability over the last 24 hours
OpenRouter Availability
98.47%
When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.
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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
What is 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.
Is Ox Alpha free?
Yes. The pricing shown on this page for Ox Alpha is zero, so you are not charged for prompt or completion tokens.
What is the context length of Ox Alpha?
Ox Alpha has a 1,048,576 token context window. It supports up to 131,072 completion tokens.
Does Ox Alpha support tool calling and structured outputs?
Yes. Ox Alpha accepts `tools` and `tool_choice` for function calling. It supports `response_format` for JSON output, without JSON-schema enforcement.
What inputs and outputs does Ox Alpha support?
Ox Alpha accepts text, images and video as input and returns text.
When was Ox Alpha released?
Ox Alpha was released on August 20, 2026.