Grok Voice TTS 1.0
Convert text into spoken audio with a single API call. The API supports a rich set of expressive voices, inline speech tags for fine-grained delivery control, and output formats from high-fidelity MP3 to telephony-optimized μ-law.
BENCHMARKS
Not in the Epoch Capabilities Index. Epoch benchmarks what it can run, so this is a gap in coverage, not a poor result.
RELEASE DATEJul 31, 2026
WEIGHTSClosed weights
CONTEXT WINDOW15K
MAX OUTPUT15K
REASONINGNo
TOOL CALLINGNo
INPUTStext
OUTPUTSaudio
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.