claude-code - 💡(How to fix) Fix [BUG] WebSearch tool failing with model access error (claude-haiku-4-5-20251001) [2 comments, 2 participants]

Title: WebSearch tool failing with model access error (claude-haiku-4-5-20251001) The WebSearch tool has stopped working. Whenever I attempt a search, the tool returns a system error instead of search results. This started Error Message: 3. The tool returns the model access error listed above. The WebSearch tool has stopped working. Whenever I attempt a search, the tool returns a system error instead of search results. This started

Error Messages/Logs

model access error (claude-haiku-4-5-20251001) 3. The tool returns the model access error listed above.

TL;DR

The WebSearch tool may be failing due to an issue with the selected model, and switching to a different model might resolve the problem.

Guidance

• Verify that the model claude-haiku-4-5-20251001 exists and is accessible by running the /model command to check available models.
• Try selecting a different model using the /model command to see if the issue persists.
• Check if there were any changes or updates to the Anthropic API or Claude Code that might have affected model access.
• Review the error message and logs to ensure that the issue is indeed related to model access and not a different problem.

Example

No code snippet is provided as the issue seems to be related to model access and configuration rather than code.

Notes

The fact that this was working in a previous version and stopped working on May 4th, 2026, suggests that there might have been a change or update that caused the issue. However, without more information about the changes or updates, it's difficult to provide a more specific solution.

Recommendation

Apply workaround: Try selecting a different model to see if the issue resolves, as the current model claude-haiku-4-5-20251001 may not be accessible or may have been deprecated.