René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Claude Opus 4.5 requests return error 400","articleBody":"**Describe the bug**\nWhen making an Agent request using Claude Opus 4.5 I have been getting the same error message all day:\n\nSorry, an error occurred while generating a response. Details: unhandled status from server: 400 {\"error\": {\"message\": \"messages.1.content.0.thinking: each thinking block must contain thinking\",\"code\":\"invalid_request_body\"}} Request ID: xxx\n\n**Versions**\n- Copilot for Xcode: 0.46.0\n- Xcode: 26.2.0\n- macOS: 26.2\n\n**Steps to reproduce**\n1. Select Claude Opus 4.5 as model\n2. Select Agent mode\n3. Enter prompt\n4. Error is returned\n\n**Screenshots**\n\u003cimg width=\"427\" height=\"106\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/59ac4a69-ddfd-4fc0-9c31-aa65a68e40e4\" /\u003e\n\n**Logs**\n[github-copilot-for-xcode.log](https://github.com/user-attachments/files/24520525/github-copilot-for-xcode.log)\n\n**Additional context**\nAttempted the following to try and resolve:\n- Signing out then back in\n- Cleaning DerivedData/Copilot cache\n- Restarting device\n- Uninstalling / Reinstalling Copilot\n","author":{"url":"https://github.com/nick-holmes","@type":"Person","name":"nick-holmes"},"datePublished":"2026-01-09T06:04:55.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/703/CopilotForXcode/issues/703"}