cd /news/large-language-models/stealth-model · home topics large-language-models article
[ARTICLE · art-105277] src=openrouter.ai ↗ pub= topic=large-language-models verified=true sentiment=· neutral

Stealth Model

OpenRouter has released Ox Alpha, a free stealth reasoning model with a 1 million token context window, designed for coding, agentic work, and production workloads. The model, released on August 20, 2026, is developed by an anonymous third-party provider and achieves 67 tokens per second throughput with 1.06 seconds latency. Prompts and completions are retained by the provider but not used for training.

read1 min views5 publishedAug 20, 2026
Stealth Model
Image: source

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).

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

| Free | Free | 1.06s | 67 tps |

Throughput

67tok/s

P50, best across providers

Latency

1.06s

P50, best provider

99.98%

99.91%

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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LIVE [news/stealth-model] indexed:0 read:1min 2026-08-20 ·