Teresa Torres(@ttorres):I'm seeing a huge difference in performance (in a bad direction) across my evals moving from Sonnet 4.6 to Sonnet 5. Previously, my service ran at temperature 0. I'm wondering what prompt strategies people are using to constrain Sonnet 5 now that temperature is no longer an option.

Teresa Torres

@ttorres

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Teresa Torres@ttorres

2026.07.21 20:15

I'm seeing a huge difference in performance (in a bad direction) across my evals moving from Sonnet 4.6 to Sonnet 5. Previously, my service ran at temperature 0. I'm wondering what prompt strategies people are using to constrain Sonnet 5 now that temperature is no longer an option.