OpenAI Responses API Started Rejecting input_text With No Warning — Here's the Fix and Why It Keeps Happening

📰 Dev.to · FlareCanary

Learn how to fix the OpenAI Responses API error when input_text is rejected and understand why it happens

intermediate Published 30 Apr 2026
Action Steps
  1. Check the API documentation for supported parameters
  2. Verify the input_text parameter is correctly formatted
  3. Update the API request to use the correct parameter name
  4. Test the updated API request to ensure the error is resolved
  5. Review the API changelog to stay informed about updates and changes
Who Needs to Know This

Developers using OpenAI APIs for text-based applications will benefit from this fix to ensure seamless integration and avoid errors

Key Insight

💡 The OpenAI Responses API has changed its supported parameters, causing the input_text error

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🚨 Fix the OpenAI Responses API error: input_text not supported! 🚨

Key Takeaways

Learn how to fix the OpenAI Responses API error when input_text is rejected and understand why it happens

Full Article

If you're here because you just got this error: Invalid value: 'input_text'. Supported values are:...
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