Power Platform Community Forum Thread Details

Wondering if anyone has also experienced formatting issues for published agents which are running on Claude models (using Claude Opus 4.5 specifically) in Copilot Studio Full when talking to the agent in M365 Copilot Chat.

I have tried suppressing / formatting the response via the Agent Instructions to use Markdown and to not print tags however the Claude output still responds with formatting artefacts especially for longer detailed responses. This includes full <thinking> blocks and sometimes only <thinking? blocks.

Seems like this is only an issue for Claude Models as I never had an issue with GPT-5. This also does not occur in the published Teams Chat version.

If anyone has insight on how they overcame this it would be greatly appreciated!