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AssemblyAI launches $15/million char TTS API for voice agents

By PulseAugur Editorial · [1 sources] ·

AssemblyAI has launched AssemblyAI-TTS-1, a new text-to-speech API designed for voice agents in live phone calls. The service offers competitive pricing at $15 per million characters and boasts low latency, with a median time to first byte of 47 ms in self-reported tests. While it demonstrates strong entity accuracy comparable to ElevenLabs v4, independent benchmarks show mixed results regarding latency and naturalness compared to competitors like Inworld TTS-2 Flash. AI

IMPACT This release offers a new, cost-effective option for developers building voice agents, potentially lowering the barrier to entry for real-time conversational AI applications.

RANK_REASON Product launch of a TTS API by a company specializing in AI for voice.

Read on MarkTechPost →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

AssemblyAI launches $15/million char TTS API for voice agents

How we ranked this

Signal score
45 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
Product launch of a TTS API by a company specializing in AI for voice.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, infra
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AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
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Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. MarkTechPost TIER_1 English(EN) · Michal Sutter ·

    AssemblyAI Ships AssemblyAI-TTS-1: A $15 per 1M Character Text-to-Speech API for Voice Agents

    <p>AssemblyAI has released AssemblyAI-TTS-1, its first text-to-speech model for voice agents. It costs $15 per 1M characters, offers unlimited concurrency without a contract, and supports 6 languages at launch.</p> <p>The post <a href="https://www.marktechpost.com/2026/10/29/asse…

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