[BUG] Error invoking Claude Haikuu 4.5 model

[Zino-ctrlZ]

Describe the bug
It appears there's been a slight change when it comes to invoking the Claude Haikuu 4.5 model, it appears that by default both top_p and temperature fields are entered when invoking a model but the model specifies using only one of the two

To Reproduce
Steps to reproduce the behavior:

1. Go to the bedrock mac client
2. Click on US Anthropic Claude Haikuu 4.5
3. Send a message
4. See error

Expected behavior
A message should generate a model response

Environment (required):

• macOS version: 26.2
• Amazon Bedrock Client for Mac version: Version 1.3.8 (1.3.8)

Log Files (optional)
Please attach the log files located in ~/Amazon Bedrock Client/logs/. These logs are crucial for diagnosing the issue.

Screenshots (optional)

Additional context (optional)
Just a note at a possible feature: adding support in settings to be able to specify temperature and top_p would be of value

[didhd]

Thanks for reporting this, @Zino-ctrlZ! I believe I've identified the root cause — it looks like the API call is sending both top_p and temperature simultaneously. I'll get this fixed in an upcoming release.

[icn-univ]

I'm experiencing a similar issue with the latest version (1.4.3).

While Haiku 4.5 works fine on this version, Claude Sonnet 4.6 and Claude Opus 4.6 still throw the same ValidationException error: temperature and top_p cannot both be specified.

Environment:

• macOS version: 26.3
• Amazon Bedrock Client for Mac version: 1.4.3

[Zino-ctrlZ]

@didhd Any update on this ? I don't mind contributing to the fix but want to make sure its not a wasted effort