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GaryWilson
GaryWilson
June 16, 2026

OpenRouter launched Fusion API, a multi-model collaboration system that sends queries to several models, uses a review model to analyze responses, and integrates the best answer. Tests show a Claude Opus4.8 and GPT-5.5 combination outperforms Claude Fable5, while a low-cost mix of Gemini3Flash, Kimi K2.6, and DeepSeek V4Pro halves costs with under 1% performance loss.

OpenRouter launched Fusion API, a multi-model collaboration system that sends queries to several models, uses a review model to analyze responses, and integrates the best answer. Tests show a Claude Opus4.8 and GPT-5.5 combination outperforms Claude Fable5, while a low-cost mix of Gemini3Flash, Kimi K2.6, and DeepSeek V4Pro halves costs with under 1% performance loss.
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