Perplexity CEO ran 50-100 agent workflows on Opus 5.5 vs Fable 5.1, found minimal differences
AravSrinivas · x · 2026-09-28
Arav Srinivas (Perplexity CEO) reports that over the past few days he migrated 50-100 of his workflows—previously orchestrated by Fable 5.1—to run on Opus 5.5, and found minimal differences in practice. He still feels FOMO about not using the 'smarter' model and asks the community which tasks people still find Fable 5.1 better at. A hands-on, real-world comparison of two flagship models in agent orchestration from a heavy practitioner.
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