openclaw - 💡(How to fix) Fix LCM compaction sends deprecated parameter to claude-opus-4-7, causing repeated API errors and retry loops [1 participants]

After upgrading to OpenClaw 2026.4.21, LCM (Lossless Context Management) compaction is sending temperature: 0.2 to anthropic/claude-opus-4-7, which no longer accepts this parameter. This causes every compaction attempt to fail with a 400 error and then retry, wasting tokens and introducing latency.

Error observed in logs

[lcm] empty normalized summary on first attempt; finish=error; error_message=400 {"type":"error","error":{"type":"invalid_request_error","message":"temperature is deprecated for this model."}}

• The repeated error/retry loop appears to cause downstream issues with tool result handling in the active session ("missing tool result" synthetic errors inserted into transcript)

TL;DR

Remove or update the hardcoded temperature parameter in the LCM compaction request path to accommodate the deprecation in anthropic/claude-opus-4-7.

Guidance

• Verify the anthropic/claude-opus-4-7 model documentation to confirm the deprecation of the temperature parameter and check for any recommended alternatives.
• Investigate the OpenClaw codebase to locate where the temperature parameter is hardcoded in the LCM compaction request path.
• Consider implementing a model-specific configuration or override to handle deprecated parameters and prevent similar issues in the future.
• Monitor the gateway logs for the error pattern to ensure any changes are effective in preventing the retry loop and downstream issues.

Example

No code snippet is provided due to the lack of specific code details in the issue.

Notes

The solution may require updates to the OpenClaw codebase or configuration, which could involve collaborating with the development team or waiting for an official fix.

Recommendation

Apply a workaround by removing or updating the hardcoded temperature parameter, as upgrading to a fixed version is not mentioned as an option in the issue.