Gradium AI has released a new text-to-speech model and made it the default for its API and Studio, according to Techub News. The announcement, first reported by MarkTechPost, reveals that the model achieved an 81.0% human-rated pass rate on a hard-case test set made up of 500 sentences across five languages. That result places it ahead of Cartesia Sonic 3.6, which posted 75.1%, and ElevenLabs v3 Conversational, which came in at 65.4%. In the Coval benchmark, the median time to first audio generation is 216 milliseconds, which the company says is 170 milliseconds faster than the alternative model it replaces. The new model has been live and set as default since August 31, 2026, meaning existing users do not need to migrate or make any changes. Gradium AI has also open-sourced the full 500-sentence evaluation dataset on Hugging Face, so that the test data is publicly available. The update covers both the API and the Studio platform, making the model the standard choice for new requests.
Gradium AI has introduced a new text-to-speech model and set it as the default for both its API and Studio, according to Techub News. The update, first reported by MarkTechPost, brings a significant performance upgrade based on the company's own evaluation.
On a hard-case test set of 500 sentences across five languages, the model earned an 81.0% human-rated pass rate. That compares with 75.1% for Cartesia Sonic 3.6 and 65.4% for ElevenLabs v3 Conversational. The company also measured a median first-audio generation time of 216 milliseconds in the Coval benchmark, 170 milliseconds faster than the alternative model it replaces.
The new model went live on August 31, 2026 and is now the default. Existing users need no migration. In addition, Gradium AI has open-sourced the 500-sentence evaluation dataset on Hugging Face.
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