We can use it in patchwork already by using model=gemini-1.5-flash-latest at CLI.
We have benchmarked the AutoFix patchflow in patchwork on a number of projects. E.g. here are a few PRs with differed models that fix vulnerabilities -
https://github.com/patched-codes/dvpwa/pulls
https://github.com/patched-codes/tarpit/pulls
https://github.com/patched-codes/shiftleft-java-demo/pulls