Vertex AISpeech to textComing soon

gemini-3.5-transcribe-preview

Name: gemini-3.5-transcribe-preview
Brand: Vertex AI

gemini-3.5-transcribe-preview is a speech to text tool from Vertex AI that runs in the background and returns structured JSON. Coming soon: listed with its price, not yet open to runs.

This tool is listed but not yet available to run.

Price pending

Pricing

Price pending.

Limits

Runs: In the background
Returns: json
Longest queue wait: 3600s
Run deadline: 1800s
Largest inline input: 1024 KB
Largest input file: 500 MB
Largest output: 4768 MB
Outputs per run: 16

Input

Field	Kind	Default	Description
`contents` required	JSON	—	Required. The content of the current conversation with the model. For single-turn queries, this is a single instance. For multi-turn queries, this is a repeated field that contains conversation history + latest request.
`generationConfig`	JSON	—	Optional. Generation config.
`systemInstruction`	JSON	—	Optional. The user provided system instructions for the model. Note: only text should be used in parts and content in each part will be in a separate paragraph.

Same request in code

curl https://api.spiral.ai/v1/runs \
  -H "Authorization: Bearer $SPIRAL_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "provider": "vertex",
    "model": "gemini-3.5-transcribe-preview",
    "input": {
      "contents": {}
    }
  }'