s/joeykrugMODEL LAUNCH•Oct 4
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Opus 5.5 isn’t automatically better than Sonnet 5.5 for coding
Developers are finding that Opus 5.5 is not automatically better than Sonnet 5.5 for routine software work. Sonnet handled a full day of full-stack development with no noticeable difference, while Opus is getting the edge on complex projects, diagrams, subagent direction, and longer tasks.
The split is showing up in real testing, including a game prototype built from Tripo AI models and experiments with Seedance 2.5. Results have also been inconsistent after some initially flawless runs, with developers testing whether Opus can reliably navigate projects exceeding 100,000 lines of code.
The split is showing up in real testing, including a game prototype built from Tripo AI models and experiments with Seedance 2.5. Results have also been inconsistent after some initially flawless runs, with developers testing whether Opus can reliably navigate projects exceeding 100,000 lines of code.
Timeline3
Oct 3
Early hands-on comparisons between Opus 5.5 Max and Sonnet 5.5 Max surfaced.
Oct 3
A developer used Opus 5.5 to build a game prototype from models created with Tripo AI.
Oct 4
Further hands-on testing paired Opus 5.5 with Seedance 2.5.
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Oct 4