fix(e2e): move the vertex realtime suite off the retired Live preview model

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)
This commit is contained in:
Yuneng Jiang 2026-08-26 20:58:38 -07:00
parent 59658e1db1
commit f1e7d9eef7
No known key found for this signature in database
2 changed files with 2 additions and 2 deletions

View file

@ -42,7 +42,7 @@ at call time. The provider table below is the source of truth; edit `PROVIDERS`
| openai | `openai-realtime` | `openai/gpt-realtime-2` |
| azure | `azure-realtime` | `azure/gpt-realtime-2` (GA protocol) |
| gemini | `gemini-realtime` | `gemini/gemini-3.1-flash-live-preview` |
| vertex_ai | `vertex-realtime` | `vertex_ai/gemini-live-2.5-flash-preview-native-audio-09-2025` |
| vertex_ai | `vertex-realtime` | `vertex_ai/gemini-live-2.5-flash-native-audio` |
Bedrock and xai (`xai/grok-4-1-fast-non-reasoning`) are supported by the proxy but
kept commented out in `PROVIDERS` until they pass end-to-end here; re-enable them by

View file

@ -78,7 +78,7 @@ PROVIDERS = (
"vertex_ai",
"vertex-realtime",
LiteLLMParamsBody(
model="vertex_ai/gemini-live-2.5-flash-preview-native-audio-09-2025",
model="vertex_ai/gemini-live-2.5-flash-native-audio",
vertex_location="us-central1",
vertex_credentials="os.environ/VERTEXAI_CREDENTIALS",
),