OpenRouter launches Fusion multi-model intelligent fusion service

OpenRouter has launched the Fusion service, which achieves high-performance, cost-effective intelligent output through parallel multi-model responses and the fusion of judge models. DRACO benchmarks show that a budget-friendly combination of Gemini 3 Flash, Kimi K2.6, and DeepSeek V4 Pro achieves a 64.7% score at half price, approaching Claude Fable 5's 65.3%. This mechanism is robust with automatic replacement for single-model failures and supports direct API calls and custom model combinations.