OpenCode launches Union Alpha model for free use on OpenRouter
Summary
A new stealth model named Union Alpha has been launched on OpenCode and OpenRouter, allowing users to run coding agents at no cost for one week. This model is designed for agentic coding and supports both image and text inputs, as well as tool calling, making it a versatile option for developers. Notably, Union Alpha maintains user privacy with a zero-retention policy and excludes prompts from its training data, ensuring that user interactions are not stored or utilized for model improvement.
Analysis
Fable 5: Fable 5 is an established AI model referenced in coding and reasoning evaluations. Union Alpha is benchmarked as performing close to its level. OpenCode: OpenCode is a platform for accessing and running AI models with a focus on developer tools. It has made the Union Alpha model available for free use in coding agents. The platform maintains a zero-retention policy for user prompts. OpenRouter: OpenRouter is a service that routes and hosts various AI models for users and applications. It now provides free access to the Union Alpha stealth model for running coding agents. The platform supports multimodal inputs including images alongside text. Union Alpha: Union Alpha is a stealth AI model built specifically for agentic coding workflows. It is currently offered at no cost on OpenCode and OpenRouter for a one-week period with no data used for training. The model supports image inputs, tool calling, and privacy-focused operation. GPT-5.6 Terra: GPT-5.6 Terra is a high-capability model in the GPT series used as a pricing and performance reference point. Union Alpha is positioned at a comparable cost tier while approaching similar benchmark results. Free Access: Union Alpha is available at zero cost on OpenCode and OpenRouter for the next week. Privacy Features: Prompts are excluded from model training and OpenCode enforces a zero-retention policy. Core Capabilities: The model supports image and text inputs, tool calling, and is optimized for agentic coding tasks.
Categories
techaiai_agentsvirtuals