Free model for AI agents arrives in OpenRouter: Union Alpha supports 256K context

Union Alpha is positioned as a free multimodal model with 256K context in OpenRouter and OpenCode (16.09.2026). It can call tools and is designed for research, programming, and AI-agent workflows. OpenCode Data recorded 9 users, 19 completed sessions, 104 tokens, and $0,00 in spending on the same date.