Early user impression: Fable 5.1 is 'day and night' better than Opus 5 at delegation
mertdumenci · x · 2026-09-03
User mertdumenci shares first impressions of Fable 5.1, calling it fantastic to work with and "day and night" compared to Opus 5.
Anecdotally, he also notes an interesting agentic behavior difference: Fable 5.1 seems to delegate to Opus as a subagent more aggressively than Fable 5 did. This is a single user's anecdote, not a systematic evaluation.
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