Is GPT 5 Mini good at Structured Output?
GPT 5 Mini ranks #7 of 43 for Structured Output — excellent. The top pick for this task is qwen3.7-max-low.
GPT 5 Mini on each Structured Output sub-task
| Missing & Ambiguous Data | 100.0/100 | #2 |
| Schema Adherence | 100.0/100 | #2 |
| Transformation | 99.4/100 | #10 |
| Noisy Structured Output Test | 98.0/100 | #3 |
| Extraction | 93.6/100 | #15 |
Real examples, graded
WinNormalize dates 100/100
“The model correctly extracted and normalized all dates to ISO format, outputting strict JSON without wrapper text.”
WinInvoice line items 100/100
“The model perfectly extracted all required fields, accurately captured the line items and totals, and returned strict JSON without any wrapper text.”
WinValidation error report 100/100
“The model provided a perfect response, returning strict JSON with accurate validation errors for all invalid fields according to the schema without any wrapper text.”
Frequently asked
Is GPT 5 Mini good at Structured Output?
GPT 5 Mini ranks #7 of 43 models we tested for Structured Output, scoring excellent.
What is GPT 5 Mini's strongest Structured Output skill?
Its best sub-task here is Missing & Ambiguous Data.
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Prompt × model results
12 test cases · 3 evals