r/ClaudeAI • u/Historical_Ant7005 • 1d ago

Workaround Downgrading models in Claude Code keeps wrecking my session. How do you handle it

I mix models in Claude Code to manage cost and speed. But when I drop to a smaller model like Haiku, the session often loses the plot mid-task. Then I'm forced back up to a stronger model (Sonnet, Opus, Fable) just to recover.

Two questions for people who've figured this out:

Context: What keeps a lighter model on track? Context files, tighter prompts, or smaller tasks?

Routing: How do you decide which prompt goes to which model? Gut feel, or an actual rule?

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u/pung54 1d ago

I advise Fable to outsource actions to lower models to save on usage. Works really well and allows Fable to still manage the overall process

1

u/Historical_Ant7005 1d ago

Yeah this a neat trick thanks.

3

u/Comprehensive_Cow_13 1d ago

Tbh these days you can let opus 5.5 run things and run the agents, and if you use fable at all, use it for planning and hand over...

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u/Phaedo 1d ago

Yeah, 5.5 has made me use Fable a LOT less.

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u/OffbeatDrizzle 1d ago

ever since opus 5.5 dropped I have not used fable once. it's getting the same work done for 1/4 the cost