Grok TTS
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.
- Context window
- 15K tokens in · 15K out
BENCHMARKS
Not in the Epoch Capabilities Index. Epoch benchmarks what it can run, so this is a gap in coverage, not a poor result.
xAI's past year
19 release days in the past year, about one every 19 days. The next is expected around Nov 7, 2026. Forecasts ↗
NovDecJanFebMarAprMayJunJulAugSepOctNov
Specifications
RELEASE DATEMar 16, 2026
WEIGHTSClosed weights
CONTEXT WINDOW15K
MAX OUTPUT15K
REASONINGNot listed
TOOL CALLINGNot listed
INPUTStext
OUTPUTSaudio/mpeg, audio/wav, audio/pcm, audio/basic, audio/alaw
Specifications and prices from Models.dev; availability and limits may differ by provider. Benchmarks from Epoch AI (CC BY 4.0), LiveBench and the other sources named above.