GPT-Realtime-2.1
- Pricing
- Not published
- Listed
- 3mo ago
Cost
Fish Audio's S2.1 Pro Free is the free variant of the company's S2.1 Pro text-to-speech model, the same model offered at no cost for testing, prototyping, development, and smaller businesses. Fish Audio's launch announcement headlines a free text-to-speech API for developers, which the company attributes to the inference engineering behind S2.1 Pro. The model is built for turning written text into spoken audio, with uses including audiobooks, narration, conversational assistants, accessibility, and voices cloned from a speaker's own recordings.
How it compares
Frequently asked questions
Quality and benchmarks
GPT-Realtime-2.1 by OpenAI, Gemini 3.5 Transcribe Live by Google DeepMind, and Sonic 3.6 by Cartesia. These were matched on model kind and release date, with no comparable price available.
GPT-Realtime-2.1S2.1 Pro Free vs GPT-Realtime-2.1Gemini 3.5 Transcribe LiveS2.1 Pro Free vs Gemini 3.5 Transcribe LiveSonic 3.6S2.1 Pro Free vs Sonic 3.6
Basics
Fish Audio. It was first listed on OpenRouter on July 29, 2026.
Generated from Vertical Tabs data, updated November 3, 2026.
Discussion
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