Anthropic provides details regarding between Opus 4.7 and 4.6, including Opus 4.7 doesn't call tools as frequently as 4.6 due to being more capable. Depending on the task at hand, that could a good thing or not so good [1].

For example, regarding instruction following:

Claude Opus 4.7 interprets prompts more literally and explicitly than Claude Opus 4.6, particularly at lower effort levels. It will not silently generalize an instruction from one item to another, and it will not infer requests you didn't make.

[1]: https://platform.claude.com/docs/en/build-with-claude/prompt...

That explains a lot actually. So the fewer tool calls its by design. Makes sense but for coding specifically I'd rather it read my files than guess whats in them.