tl;dr: Claude Fable 5.2 has achieved a score of 65 on Artificial Analysis's Intelligence Index v5.0.1, the highest recorded so far on the benchmark, which aggregates nine evaluations spanning agentic coding, scientific reasoning, knowledge reliability, and document reasoning. The model currently has no publicly available API. The index also tracks cost per task, token usage, context window, and latency metrics alongside raw intelligence scores.