Anyone who uses Sonnet for simple tasks in a workflow just got a massive intelligence boost and a price drop for those testing, tools calling and debugging jobs.
Big brain work is still an Opus 4.8/ChatGPT 5.5 task (and hopefully Fable 5 and ChatGPT 5.6 soon) but if you are into the multi agent workflow and need a smart, cheap minion to leave more tokens/$ for your larger models then this is a great day for the coding world I think.
There will be a lot of hissing and booing online because its not Fable 5 but I think they are missing where the value has been added. A rising tide lifts all boats and this is definitely raising the baseline.