OpenRouter, the unified multi-model AI routing platform, has announced a new product called Fusion via a dedicated product page published June 15, 2026. The Fusion API name suggests an ensemble or blending strategy that synthesizes outputs from multiple underlying models rather than routing each request to a single model. If confirmed, this marks a strategic shift for OpenRouter from pure model aggregation toward offering proprietary, value-added inference capabilities through its existing API.
OpenRouter, an AI gateway startup founded in 2023, raised a $113 million Series B led by CapitalG. The round reportedly values the company at about $1.3 billion post-money, more than doubling from its estimated $547 million valuation after its June 2025 Series A. The company says it now offers access to over 400 models, has 8 million global users, and processes 100 trillion tokens per month.