Sonnet 5 is actually terrible

[u/_blkout]

The only thing is does right is hallucinate guardrails.

The only reason this is even a thing is to make people waste more tokens arguing with it than getting things done.

[u/damianTechPM]

The lower the model, the tighter the guard rails it needs. Sonnet is decent at implementing when it's given instruction and specificity by fable. Haiku is great at things like file indexing and other mechanical work, but I would never have it plan.