[hamsterhooey91]

GPT5.5 with Codex is definitely on-par or better than Opus 4.8, GPT5.4 isn't far behind either (source: our dev team uses opus and gpt interchangeably).

I've also used Composer2.5 on hobby projects and it is definitely on-par with Opus 4.8 (thinking mode: medium), but much faster.

Do you think you're getting better results with Claude because your agent stack (skills, MCPs, etc.) are configured for it and not for the others?