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Fix content input conversion for OpenAI Responses API #8993

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Merged
merged 7 commits into from
Nov 6, 2025
Merged

Fix content input conversion for OpenAI Responses API #8993

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a1d14a5
Initial plan
Copilot Oct 29, 2025
bb6ab0f
Fix image input handling for OpenAI Responses API
Copilot Oct 29, 2025
ac2709b
Fix linting issues in image conversion code
Copilot Oct 29, 2025
71bd42a
Add better error handling for malformed data URIs
Copilot Oct 29, 2025
43c8fc9
Remove docstrings from test cases
Copilot Oct 30, 2025
6da81b3
Fix image format to match OpenAI Responses API documentation
Copilot Oct 30, 2025
0055def
Convert text items from 'text' to 'input_text' for Responses API
Copilot Oct 30, 2025
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Add better error handling for malformed data URIs 
Co-authored-by: TomeHirata <[email protected]>
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@TomeHirata
Copilot and TomeHirata committed Oct 29, 2025
commit 71bd42a8bd34db9c5674bc4a2565f3f333c5f409
10 changes: 9 additions & 1 deletion dspy/clients/lm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -506,7 +506,14 @@ def _convert_content_item_to_responses_format(item: dict[str, Any]) -> dict[str,
if len(parts) == 2:
header, data = parts
# Extract media type from header (e.g., "data:image/png;base64" -> "image/png")
media_type = header.split(";")[0].replace("data:", "")
# Handle both "data:image/png;base64" and "data:image/png" formats
media_type_parts = header.split(";")[0].replace("data:", "")
if media_type_parts:
media_type = media_type_parts
else:
# Fallback to a default media type if extraction fails
media_type = "image/png"

return {
"type": "input_image",
"source": {
Expand All @@ -515,6 +522,7 @@ def _convert_content_item_to_responses_format(item: dict[str, Any]) -> dict[str,
"data": data,
}
}
# If data URI is malformed (doesn't have comma separator), fall through to URL handling

# Otherwise treat as URL
return {
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