Not my experience. What doesn't work for you?

I use Opus 4.6 (for complex refactoring), Gemini 3.1 Pro (for html/css/web stuff) and GPT Codex 5.3 (workhorse, replaced Sonnet for me because in Copilot it has larger context) mostly.

For small tools. But also for large projects.

Current projects are:

1) .NET C#, Angular, Oracle database. Around 300k LoC.

2) Full stack TypeScript with Hono on backend, React on frontend glued by trpc, kysely and PostgreSQL. Around 120k LoC.

Works well in both. I'm using plan mode and agent mode.

What helps a ton are e2e playright tests which are executed by the agent after each code change.

My only complain is that it tends to get stutters after many sessions/hours. A restart fixes it.

$39/mo plan.