What changed
A new record entered the field.
Epoch AI's catalog records Gemini Flash 3.1 TTS as a Audio model for Audio generation. It lists API access and closed weights.
Why it belongs in the race record
A dated model release changes the set of options available for evaluation. This briefing preserves that release fact so readers can follow the field by lab, domain, task, and access without treating a launch announcement as proof of performance.
Evidence boundary
This brief records a dated release and catalog classifications. It does not claim benchmark leadership, adoption, price, latency, or overall superiority.
For model selection, evaluate the release against the task, cost, latency, access, and risk requirements that apply to your deployment.