> were fine on max before this

Ya...you may be who I'm talking about though (if you're speaking from experience). If your methodology is "I used 4.6 max, so I'm going to try 4.7 max" this is fully on you - 4.7 max is not equivalent to 4.6 max, you want 4.7 xhigh.

From their docs:

max: Max effort can deliver performance gains in some use cases, but may show diminishing returns from increased token usage. This setting can also sometimes be prone to overthinking. We recommend testing max effort for intelligence-demanding tasks.

xhigh (new): Extra high effort is the best setting for most coding and agentic use cases.