Not GP but my experience with Haiku-4.5 has been poor. It certainly doesn't feel like Sonnet 4.0 level performance. It looked at some python test failures and went in a completely wrong direction in trying to address a surface level detail rather than understanding the real cause of the problem. Tested it with Sonnet 4.5 and it did it fine, as an experienced human would.
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Not GP but my experience with Haiku-4.5 has been poor. It certainly doesn't feel like Sonnet 4.0 level performance. It looked at some python test failures and went in a completely wrong direction in trying to address a surface level detail rather than understanding the real cause of the problem. Tested it with Sonnet 4.5 and it did it fine, as an experienced human would.