Opus 5.5 is my favorite model ever, by far

A user expresses strong preference for Opus 5.5 over new OpenAI models and Fable 5.1, despite initial excitement for the former. They highlight Opus 5.5's significantly lower usage costs, stating that what Fable 5.1 costs in 30 minutes for one agent, Opus 5.5 costs for a full day with five subagents. The user finds Opus 5.5 superior in every aspect and has not used Codex/ChatGPT since trying it.

This user account uniquely details Opus 5.5's cost-effectiveness compared to Fable 5.1, citing a full day's work with five subagents for the same cost as 30 minutes with one Fable 5.1 agent.