Merge API Launches Fusion: Multiple Models Collaborate, Outperforming Single Frontier Models

Merge API launches Fusion, a service that sends a single prompt to multiple models independently, then a judge model consolidates the answers. Benchmarks show an open panel (GLM-5.2+DeepSeek V4 Pro+Qwen 3.7) beats GPT-5.5 solo by 10.5 points and matches Claude Fable 5 quality at roughly a quarter of the cost. Each model answers the full prompt, akin to an expert panel with an editor.

• multi-model
• Fusion
• ensemble
• merge