A 65-day analysis claims 39% of Fable 5 Claude Code calls get zero thinking tokens.

An X post by @Lon analyzing 43,000+ invocations reports a median of 123 thinking tokens against benchmark configurations using 16K-128K, and an 18-50% August drop against July with median thinking at literal zero for about a week around August 22 (via r/ClaudeAI). The interesting claim is that score per thinking token is still climbing at 128K. I could not verify any of this, the 430-upvote thread is corroborating sentiment rather than corroborating measurement, and one commenter points out some users simply have thinking disabled in settings. Reporting it because the measurement approach is reproducible if someone wants to redo it properly.