Thinking with Structured Output does not work #276

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2026-02-15T16:29:27-05:00

yindo commented

2026-02-15 16:29:27 -05:00

Originally created by @salbahra on GitHub (May 30, 2025).

Originally assigned to: @ParthSareen on GitHub.

Updated to the latest to use the new thinking mode along with structured outputs and ran into an error. I typically make the call using:

response = client.chat(
                    model=model,
                    messages=messages,
                    format=output_model.model_json_schema(),
                    think=True, # added this recently
                    options={"temperature": 0, "num_ctx": 16384}
                )

and process the output using:

output = output_model.model_validate_json(response.message.content)

This works still when think is omitted however with it added and set to True, I get the following output:

role='assistant' content='{\n\n{\n\n"vte_present": "uncertain",\n"reason_for_answer": "Positive study for acute upper extremity nonocclusive DVT in the axillary vein (deep vein) but evidence of occlusive superficial venous thrombus in the cephalic or basilic veins. Since superficial venous thrombosis is not considered VTE, and there\'s a possibility that the axillary vein finding might be chronic or uncertain, it should be classified as uncertain."\n}\n\n  ' thinking=None images=None tool_calls=None

Notice the double opening curly brace and that thinking is None. Please let me know if I can provide any other details.

Originally created by @salbahra on GitHub (May 30, 2025). Originally assigned to: @ParthSareen on GitHub. Updated to the latest to use the new thinking mode along with structured outputs and ran into an error. I typically make the call using: ``` response = client.chat( model=model, messages=messages, format=output_model.model_json_schema(), think=True, # added this recently options={"temperature": 0, "num_ctx": 16384} ) ``` and process the output using: ``` output = output_model.model_validate_json(response.message.content) ``` This works still when `think` is omitted however with it added and set to True, I get the following output: ``` role='assistant' content='{\n\n{\n\n"vte_present": "uncertain",\n"reason_for_answer": "Positive study for acute upper extremity nonocclusive DVT in the axillary vein (deep vein) but evidence of occlusive superficial venous thrombus in the cephalic or basilic veins. Since superficial venous thrombosis is not considered VTE, and there\'s a possibility that the axillary vein finding might be chronic or uncertain, it should be classified as uncertain."\n}\n\n ' thinking=None images=None tool_calls=None ``` Notice the double opening curly brace and that thinking is None. Please let me know if I can provide any other details.

yindo added the thinking label 2026-02-15 16:29:27 -05:00

yindo commented

2026-02-15 16:29:28 -05:00