Stealth

Crouton Alpha is a lightweight model built for scalable coding, agentic, and multimodal workflows. It's ideal for executing agentic sub-tasks, tool use, and document analysis in high-volume, repeated work. Developers can combine it with frontier reasoning models to execute the bounded steps that turn plans and information into action. Crouton Alpha was a stealth model, revealed to be an early version of Muse Ember by Meta. OpenRouter routed requests to it and was not its developer, owner, or provider. Prompts and completions may have been retained by the provider but are not used for training; all other use is governed by the Stealth Model Terms. The stealth period has ended; use Muse Ember at https://openrouter.ai/meta/muse-ember.

Space Bunny Alpha is an anonymous large model with blazing-fast inference, strong coding capabilities and native multimodal input support. It delivers adjustable reasoning effort, and a 1M-token context window. Space Bunny Alpha was a stealth model, revealed to be MiniMax M3.1 Flash by MiniMax. OpenRouter routed requests to it and was not its developer, owner, or provider. Prompts and completions may be retained by the provider but are not used for training; all other use is governed by the Stealth Model Terms. The free stealth period has ended; use MiniMax M3.1 Flash at https://openrouter.ai/minimax/minimax-m3.1-flash.

Union Alpha is a multimodal model built for research, coding, and agentic workflows, while delivering frontier-level performance across a broad range of general-purpose tasks. Union Alpha was a stealth model, revealed to be Pareto by Unbiased. OpenRouter routed requests to it and was not its developer, owner, or provider. Prompts and completions may be retained by the provider but are not used for training; all other use is governed by the Stealth Model Terms. The free stealth period has ended; use Pareto at https://openrouter.ai/unbiased/pareto.

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.