falText to speechComing soon

elevenlabs/tts/eleven-v4-turbo

Name: elevenlabs/tts/eleven-v4-turbo
Brand: fal

elevenlabs/tts/eleven-v4-turbo is a text to speech tool from fal that runs in the background and returns audio. Coming soon: listed with its price, not yet open to runs.

This tool is listed but not yet available to run.

Priced by usage

Pricing

$0.052 per 1,000 characters of text. The final charge comes from usage.

Limits

Runs: In the background
Returns: audio
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
`text` required	text	—	The text to convert to speech. Supports audio tags such as [whispering] and IPA pronunciation enclosed in forward slashes.
`voice`	text	Rachel	The voice to use for speech generation
`stability`	number 0 to 1	0.5	Voice stability. Lower values allow more expressive delivery; higher values make delivery more consistent.
`similarity_boost`	number 0 to 1	0.75	How closely the output follows the reference voice. Higher values increase similarity but may reduce naturalness.
`seed`	number (whole) 0 to 4294967295	—	Seed for best-effort reproducibility. Identical output is not guaranteed.
`language_code`	text	—	Language code (ISO 639-1) for speech generation and text normalization.
`output_format`	one of mp3_22050_32, mp3_44100_32, mp3_44100_64, mp3_44100_96, mp3_44100_128, mp3_44100_192, pcm_8000, pcm_16000, pcm_22050, pcm_24000, pcm_44100, pcm_48000, ulaw_8000, alaw_8000, opus_48000_32, opus_48000_64, opus_48000_96, opus_48000_128, opus_48000_192	mp3_44100_128	Output format of the generated audio. Formatted as codec_sample_rate_bitrate.
`apply_text_normalization`	one of auto, on, off	auto	Whether to normalize text such as numbers and dates before generation.
`timestamps`	true or false	false	Whether to return character-level timing information with the generated audio.

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": "fal",
    "model": "elevenlabs/tts/eleven-v4-turbo",
    "input": {
      "text": "[excited] Hello! Welcome to Eleven v4."
    }
  }'