Audio Input

Use the input_audio content-part to send audio to audio-capable models.

Example

curl https://llmtr.com/v1/chat/completions \
  -H "Authorization: Bearer sk_your_key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-2.5-flash",
    "messages": [
      {
        "role": "user",
        "content": [
          { "type": "text", "text": "Transcribe and briefly summarize." },
          {
            "type": "input_audio",
            "input_audio": {
              "data": "BASE64_WAV_DATA",
              "format": "wav"
            }
          }
        ]
      }
    ]
  }'

Supported formats

wav
mp3
flac
ogg
webm

Size limit

Inline base64: < 1 MB recommended.
Longer audio: upload via Files API and reference file_id.

File ID reference

{
  "type": "input_file",
  "input_file": {
    "file_id": "file_xxx",
    "mime_type": "audio/wav"
  }
}

Supported models

Audio input is mainly available on Google Gemini family. Check:

curl "https://llmtr.com/api/models?modality=audio" \
  -H "Authorization: Bearer sk_your_key"