That's just one part of it. According to https://openrouter.ai/docs/guides/routing/model-variants/exacto https://openrouter.ai/docs/guides/routing/model-variant

That's just one part of it. According to https://openrouter.ai/docs/guides/routing/model-variants/exacto https://openrouter.ai/docs/guides/routing/model-variants/exa... We use three classes of signals: * Tool-calling success and reliability from real traffic * Provider performance metrics such as throughput and latency * Benchmark and evaluation data as it becomes available