Fable 5.2 cost per task doubles to $26.54, undercutting Anthropic's efficiency claims
haider1 · x · 2026-11-11
Citing Artificial Analysis data, haider1 argues Fable 5.2 isn't as efficient as Anthropic claims: while its Intelligence Index jumps to 65 (vs 59 for Opus 5.5 and 49 for Fable 5.1), cost per task doubled from $12.99 to $26.54 and tokens per task rose from 118k to 274k. He reads it as a post-training improvement with only marginal gains over Opus 5.5, which also leads on output speed (115 vs 102 tok/s).
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