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OpenAI API changes
Potentially breaking

Response property enum value added: service_tier (ultrafast)

openapi:POST /agents/sessions::response.201.text.event-stream.oneOf[#.components.schemas.SessionEventAgentSessionInProgress].session.agent.service_tier
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 whole operation — a narrower excerpt was not available for this change. Open the source ↗

−3+63 changes

1 / 3
"default",
"default",
"flex",
"flex",
"priority",
"priority",
"fast"
"fast",
"ultrafast"
],
],
"type": "string",
"type": "string",
"x-enumDescriptions": [
"x-enumDescriptions": [
"Selects the service tier automatically.",
"Selects the service tier automatically.",
"Uses the default service tier.",
"Uses the default service tier.",
"Uses the flex service tier.",
"Uses the flex service tier.",
"Uses the priority service tier.",
"Uses the priority service tier.",
"Uses the fast service tier."
"Uses the fast service tier.",
"Uses the ultrafast service tier."
]
]
},
},
{
{
"default",
"default",
"flex",
"flex",
"priority",
"priority",
"fast"
"fast",
"ultrafast"
],
],
"type": "string"
"type": "string"
},
},

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