GPT-5.5 tops the benchmarks but sits at #22 for actual usage - I built a live index that tracks both (open source)
A new open-source index called AgentTape ranks AI models based on a blend of benchmark performance, actual usage, cost, and speed. Currently, OpenAI's GPT-5 models dominate the top rankings, with GPT-5.5 specifically excelling in quality benchmarks but lagging in adoption due to its newness and price. The index aims to provide a more holistic view of model performance beyond theoretical benchmarks, reflecting real-world utility. AI
IMPACT Provides a new metric for evaluating AI models that balances benchmarks with real-world adoption and cost.