Power user: Opus 5.5 beat Fable 5.1 on cost and quality, one day of 5 subagents = 30min on Fable
breukr · reddit · 2026-09-26
A developer with two 20x ChatGPT Pro accounts says Opus 5.5 replaced Codex entirely: near-flawless task completion without babysitting, strikingly good design and backend planning, and usage limits so generous that what cost 30 minutes of one Fable 5.1 agent now funds a full day with 5 subagents. He still misses Codex's connector infrastructure and more polished computer use, and worries Anthropic may later nerf or quantize the model.
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