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OpenAI API changes
Potentially breaking

Response property enum value added: gpt-image-2.5-flare, gpt-image-2.5-flare-2026-09-08, gpt-image-2.5-sunburst, gpt-image-2.5-sunburst-2026-09-08

openapi:POST /responses::response.200.application.json.allOf[subschema-#3].instructions.anyOf[subschema-#1].oneOf[subschema-#2:-Input-item-list].items.oneOf[subschema-#2:-Item].oneOf[#.components.schemas.ToolSearchOutputItemParam].tools.items.oneOf[subschema-#9:-Image-generation-tool].model.anyOf[subschema-#2].
Product
OpenAI API
Source
OpenAPI URL
Change kind
Response Property Enum Value Added
Detected
Last updated

Deterministic evidence

Before / after

Extracted from OpenAI's published contract. Shows the changed property. Open the source ↗

−1+51 change

1 / 1
"gpt-image-1-mini",
"gpt-image-1-mini",
"gpt-image-1.5",
"gpt-image-1.5",
"gpt-image-2",
"gpt-image-2",
"gpt-image-2-2026-04-21"
"gpt-image-2-2026-04-21",
"gpt-image-2.5-sunburst",
"gpt-image-2.5-sunburst-2026-09-08",
"gpt-image-2.5-flare",
"gpt-image-2.5-flare-2026-09-08"
],
],
"type": "string"
"type": "string"
}
}

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