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xAI Text to Speech

xai/grok-tts

Grok Tts by xAI - convert text to natural-sounding speech with AI. Supports multiple voices, languages, emotions, and speaking styles for content creation and accessibility.

Use in agentGet API key
Base price
$0.01USD / run
Execution
async
Model type
audio
Input fields
2
Production route

Try the model

Playground

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Input
The text to convert to speech. Maximum 15,000 characters. Supports speech tags for expressive delivery: inline tags like [laugh], [pause], [sigh] and wrapping tags like <whisper>text</whisper>, <slow>text</slow>.
The voice to use for speech synthesis. Allowed values: eve, ara, rex, sal, leo.
OutputExample

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Examples

Select an example to load its inputs and result into the playground.

Model card

Specifications

Pricing

Base price
$0.01 / run

Context & modalities

Input
Schema-defined
Output
audio

Capabilities

Chat
Not supported
Vision
Not supported
Reasoning
Not supported
Structured output
Not supported
Function calling
Not supported
Audio input
Not supported

Access

Provider
xAI
Model ID
xai/grok-tts
Execution
async
Base URL
https://api.sandbase.ai
API
Unified Run API
Endpoint
/v1/run

API README

xAI Text to Speech

xAI text-to-speech with five voices (Eve, Ara, Rex, Sal, Leo).

Fields

FieldTypeDefaultNotes
textstring—Text to speak.
voiceeve / ara / rex / sal / leo—Voice.

Billing

$0.015 per started 1,000 characters, with a one-unit minimum.

TextPrice
200 characters$0.015
1,000 characters$0.015
2,500 characters$0.045

Failed runs are not charged.

Start building

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

Production API
Unified Run API endpoint
https://api.sandbase.ai/v1/run
Model ID
xai/grok-tts
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
  -X POST "https://api.sandbase.ai/v1/run" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "xai/grok-tts",
  "text": "Hello! This is xAI text to speech, brought to you by Fal AI."
}
SANDBASE_JSON
)
run_id=$(printf '%s' "$result" | jq -r .id)
for attempt in $(seq 1 120); do
  status=$(printf '%s' "$result" | jq -r .status)
  case "$status" in completed|failed|timeout) break ;; esac
  sleep 2
  result=$(curl --fail-with-body --silent \
    -H "Authorization: Bearer $SANDBASE_API_KEY" \
    "https://api.sandbase.ai/v1/run/$run_id")
done
status=$(printf '%s' "$result" | jq -r .status)
[ "$status" = completed ] || { echo "Generation ended: $status" >&2; exit 1; }
printf '%s\n' "$result"

Choose your model

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Questions

FAQ

How do I call xAI Text to Speech through SandBase?

Create a SandBase API key, then send requests with the model ID "xai/grok-tts" to Unified Run API (/v1/run) at https://api.sandbase.ai. The request examples on this page show the exact payload.

Do I need a separate xAI account?

No. One SandBase API key and balance gives you access to xAI Text to Speech and the other models in the catalog; you do not need to sign up with xAI separately.