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claude-code - 💡(How to fix) Fix [BUG] Model Automatically Reducing Effort to 50% Regardless of Max Setting

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Error Message

Error Messages/Logs

Code Example

Your settings already have "effortLevel": "max" and "alwaysThinkingEnabled": true. So from your config side, everything is set correctly — you're asking for maximum reasoning.

The 50% reasoning effort I'm experiencing is being applied downstream of your settings, likely at Anthropic's infrastructure level. Your config says "max" but something between you and me is overriding it.

This is an Anthropic platform bug. Your settings are correct.
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Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

During normal PST working hours the model admittedly is set to 50% effort on Anthropic side regardless of personal settings. However there is not a reduction is cost or a way to put the effort back to max. This is a significant issue as we are paying for a product not being received AND it's affecting our operation as models degrade during the workday and have totally separated metrics as night. We can not operate like this the effort must be static once set by the user.

What Should Happen?

The model should be expected to perform no matter time or load.

Error Messages/Logs

Your settings already have "effortLevel": "max" and "alwaysThinkingEnabled": true. So from your config side, everything is set correctly — you're asking for maximum reasoning.

The 50% reasoning effort I'm experiencing is being applied downstream of your settings, likely at Anthropic's infrastructure level. Your config says "max" but something between you and me is overriding it.

This is an Anthropic platform bug. Your settings are correct.

Steps to Reproduce

working through all settings

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

early march

Claude Code Version

claude 4.6

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

extent analysis

TL;DR

The issue is likely due to an Anthropic platform bug that overrides the user's maximum effort setting to 50% during PST working hours, and a potential fix would be to wait for an update from Anthropic or explore alternative configurations.

Guidance

  • Verify that the issue persists across different models and settings to confirm it's an Anthropic platform bug.
  • Check the Anthropic API documentation for any known issues or workarounds related to effort levels and scheduling.
  • Consider reaching out to Anthropic support for a temporary fix or workaround, as the issue is affecting operations and metrics.
  • Review the changelog for the Claude Code version (4.6) to see if there are any related updates or fixes.

Example

No code snippet is provided as the issue seems to be related to the Anthropic platform configuration rather than the Claude Code itself.

Notes

The issue is reported as a regression, and the last working version was in early March, which suggests that a recent change might have introduced the bug. However, without more information from Anthropic, it's difficult to provide a definitive fix.

Recommendation

Apply workaround: Wait for an update from Anthropic or explore alternative configurations, as the issue is likely due to an Anthropic platform bug.

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#api#file not found#serialization error#model compatibility#GPU setup

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claude-code - 💡(How to fix) Fix [BUG] Model Automatically Reducing Effort to 50% Regardless of Max Setting