What is OpenRouter?

OpenRouter is a platform that aggregates multiple AI models, acting as a gatekeeper and tour guide into the AI world. It offers a compound model called Fusion, which uses a panel of models, a judge, and a synthesizer for hard tasks.

• Jun 2026 - Tomasz Tunguz described OpenRouter as a gatekeeper and tour guide into the world of AI, calling it an important door to hold on to.
• Jun 2026 - Nathaniel Whittemore said OpenRouter’s Fusion is the smartest compound model in the market, achieving fable-level intelligence at half the price.
• Jul 2026 - Nathaniel Whittemore noted that OpenRouter’s Fusion used a panel of models, a judge, and a synthesizer for hard tasks.