Audio and voice APIs
Explore audio models for transcription, speech synthesis, voice applications, and generative audio. Because providers use different billing units, OneInfer ranks prices only within the same comparable unit.
Current catalog
7
audio models with verified catalog metadata
Pricing content refreshed July 25, 2026
Currently the lowest-priced option in the provider price per one million characters group. Different billing units are never mixed.
$0.180 / 1M characters
View pricing and providersComparable models are ordered by their current normalized price.
7 models
sarvam
Bulbul v2 is a high-speed, cost-effective TTS model supporting 11 Indian languages. It is distinguished by its 'Just Like India' authentic regional accents and offers granular control over pitch, speed, and volume. Optimized for real-time synthesis in customer service and e-learning applications.
Price
$0.180 / 1M characters
Context
2000
sarvam
Bulbul v3 is a production-grade text-to-speech model optimized for 11 Indian languages. It features native support for code-mixed speech, professional voice cloning, and industry-leading stability in telephony environments (8 kHz). It automatically infers prosody, emphasis, and emotional tone.
Price
$0.350 / 1M characters
Context
2000
openai
OpenAI's GPT-5.1 model, released November 13, 2025. Features a strong multimodal and reasoning capabilities, and is optimized for complex agentic workflows. It introduced significant improvements in coding, reasoning, and tool use over previous generations.
Price
$5.625 avg / 1M tokens
Context
400K
e4863abbf36c4fc8b10e095cc1aa9b6d
OpenAI's flagship GPT-5.2 Pro model, Designed for professional knowledge work and agentic workflows, exclusive 'xhigh' reasoning effort, and top-tier performance on complex reasoning, coding, and scientific benchmarks.
Price
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Context
400K
sarvam
Saaras v3 is a state-of-the-art speech recognition and translation model. It natively supports streaming for real-time applications and features specialized modes for transcription, direct-to-English translation, and transliteration. It is specifically tuned for noisy environments and complex code-mixed (e.g., Hindi-English) speech.
Price
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Context
N/A
sarvam
Saarika v2.5 is Sarvam AI's legacy speech recognition model designed for Indian languages and accents. It transcribes audio in the same language spoken, excelling in multi-speaker conversations, telephony audio (8kHz), and code-mixed speech. Supports 11 languages (Hindi, Bengali, Gujarati, Kannada, Malayalam, Marathi, Odia, Punjabi, Tamil, Telugu, English) with automatic language detection and speaker diarization. Achieves 4.96% CER and 18.32% WER on VISTAAR benchmark.
Price
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Context
N/A
cc94bcd3662444fb92e43506c7036c08
Speech 2.8-turbo is a text-to-speech model
Price
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Context
2K
OneInfer compares only positive prices with the same billing unit. Per-minute, per-character, per-token, per-image, per-video, and per-second rates remain separate. Prices can change, so the current model page and console remain the source of truth.
The lowest-priced model is calculated from the current catalog within each comparable billing unit. Per-minute, per-character, and token-based prices are not mixed.
Audio providers charge by different units. A transcription model billed per minute cannot be honestly ranked against a speech model billed per character without a common workload assumption.