Google withdrew gemini-live-2.5-flash-preview-native-audio-09-2025 from the
Vertex Live API. Every session dies at setup:
received 1007 (invalid frame payload data)
gemini-live-2.5-flash-preview-native-audio-09-2025 is not supported in the live api.
The client sees session.created (the proxy synthesizes it on connect) and then
nothing, so both vertex_ai realtime tests time out waiting for session.updated.
Confirmed by probing the Vertex Live endpoint directly with the e2e stack's own
credentials:
gemini-live-2.5-flash-preview-native-audio-09-2025 -> 1007, not supported
gemini-live-2.5-flash-native-audio -> setupComplete
so this swaps to the non-preview sibling, which is the same native-audio class
and is what the cost map already carries for vertex_ai.
Not a litellm regression. The suspicion fell on #38395 because it removed the
native-audio speechConfig strip, but the setup payload this suite sends is
byte-identical either side of that change: the strip only fires when a client
sends a voice, and the e2e SessionConfig has no voice field. Google's rejection
names the model, not a field.
The gemini (Google AI Studio) provider keeps the -09-2025 id, which still works
there; only the Vertex endpoint dropped it.
(cherry picked from commit a215ecaf3d)
f1e7d9eef7