GPT 5.5 Max or Opus 4.7 Max?

Abdelrahman Mohamed
Mon, 27 Apr 2026 13:29:45 +0000
Discussions

Hello everyone,

I’d like to hear real experiences: which is better between GPT 5.5 Max and Opus 4.7 Max for large projects?

Which is better for Flutter in terms of UI, code structure, and fewer mistakes?

Which is stronger for FastAPI for backend development, APIs, and architecture?

Which is better for maintaining consistency in a long and complex project?

Also regarding workflow:

Is it better to build a full backend in one conversation using multiple subagents?

Or better to split the project into smaller modules and handle each separately?

If you have real experience or useful advice, I’d appreciate hearing it. Thanks.

7 posts - 6 participants