ComfyUI Node
arkennemasis fal · ElevenLabs TTS Eleven v4 · $0.08/1k chars
Generate expressive speech with Eleven v4 from ElevenLabs. Control delivery with audio tags, voice stability, similarity settings, and IPA pronunciation. Pricing (from fal, 2026-09-29): $0.08 per 1000 character (fal's billing unit). Model page: https://fal.ai/models/elevenlabs/tts/eleven-v4 Key: FAL_KEY in the .env next to run_nvidia_gpu.bat. Results are saved in output/fal/elevenlabs_tts_eleven-v4/.
arkennemasis fal · ElevenLabs TTS Eleven v4 · $0.08/1k chars
- audio
- audio_path
- timestamps
- info
◄text►
◄voiceRachel►
◄stability0.50►
◄similarity_boost0.75►
◄seed-1►
◄language_code►
◄output_formatmp3_44100_128►
◄apply_text_normalizationauto►
◄timestampsfalse►
◄max_cost_usd20.0►
◄reuse_identical_runtrue►
◄extra_json►
◄max_concurrent1►
Categoryarkennemasis/fal/Audio/ElevenLabs
Inputs (13)
| Name | Type | Default | Description |
|---|---|---|---|
| text | STRING | The text to convert to speech. Supports audio tags such as [whispering] and IPA pronunciation enclosed in forward slashes. | |
| voice | STRING | Rachel | The voice to use for speech generation Empty leaves it out. |
| stability | FLOAT | 0.500–1 | Voice stability. Lower values allow more expressive delivery; higher values make delivery more consistent. |
| similarity_boost | FLOAT | 0.750–1 | How closely the output follows the reference voice. Higher values increase similarity but may reduce naturalness. |
| seed | INT | -1-1–4294967295 | Seed for best-effort reproducibility. Identical output is not guaranteed. -1 leaves it to the model. |
| language_code | STRING | Language code (ISO 639-1) for speech generation and text normalization. Empty leaves it out. | |
| output_format | COMBO | mp3_44100_128 | Output format of the generated audio. Formatted as codec_sample_rate_bitrate. |
| apply_text_normalization | COMBO | auto | Whether to normalize text such as numbers and dates before generation. |
| timestamps | BOOLEAN | false | Whether to return character-level timing information with the generated audio. |
| max_cost_usdopt | FLOAT | 20.00–100000 | Safety cap. If the estimated cost of this run is above this many US dollars the node stops BEFORE sending anything to fal. 0 = no cap. |
| reuse_identical_runopt | BOOLEAN | true | If these exact inputs (the settings AND the same pictures/clips/audio) were already paid for and the files are still in output/fal, return them instead of paying again - also after a ComfyUI restart. Turn off for a fresh take with the same settings. |
| extra_jsonopt | STRING | Advanced: a JSON object merged into the request last, for any fal field this node has no box for. Example: {"seed": 7}. Leave empty normally. | |
| max_concurrentopt | INT | 11–32 | How many paid fal calls may run at the same time in one run, across every fal node. 1 (default) = one after another. This node starts its paid part only while fewer than this many fal calls are running. Once any fal node fails, the ones still waiting are not started, so nothing more is billed. |
Outputs (4)
| Name | Type | Description |
|---|---|---|
| audio | AUDIO | — |
| audio_path | STRING | — |
| timestamps | STRING | — |
| info | STRING | JSON: request id, cost estimate, saved files and fal's full answer. |