GPT-5 models on Azure and reasoning_effort argument

[bkocis]

Question

How to use the reasoning models such as gpt-5 from Azure with Opencode.
These models, for example https://ai.azure.com/catalog/models/gpt-5 generate a reasoning_effort argument, which causes error in Opencode.

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Bug: Unknown parameter: 'reasoningEffort'. Did you mean 'reasoning_effort'? #1742: Bug: Unknown parameter: 'reasoningEffort'. Did you mean 'reasoning_effort'? - Similar issue with parameter naming for Azure
• Reasoning effort from opencode.json not passed through for Azure models #1823: Reasoning effort from opencode.json not passed through for Azure models - Reasoning effort not being passed correctly
• GPT-5 Unsupported parameter reasoning.effort #1859: GPT-5 Unsupported parameter reasoning.effort - Related issue with reasoning_effort parameter

Feel free to ignore if none of these address your specific case.

[github-actions]

To stay organized issues are automatically closed after 90 days of no activity. If the issue is still relevant please open a new one.