3 New Open-Source Voice Models Drop in One Week

Voice AI weekly digest

Top Updates 💪

• Mistral launches Voxtral TTS - Open-weight 4B TTS model. 9 languages, 90ms TTFA, 6x RTF. Runs on consumer GPUs. Mistral claims it beats ElevenLabs on quality benchmarks. (TechCrunch) (Mistral blog)

• Cohere releases Transcribe - Open-source 2B ASR model built for edge. 14 languages, 5.42 avg WER on HF Open ASR leaderboard, beating Zoom Scribe v1, IBM Granite 4.0, ElevenLabs Scribe v2, and Qwen3-ASR. Free via API and HuggingFace. (TechCrunch) (Cohere blog)

• Google ships Gemini 3.1 Flash Live + Search Live goes global - Real-time voice/video model with native function calling. 90.8% on ComplexFuncBench Audio (~20% jump over prev gen). Now powers Search Live in 200+ countries with voice and camera input. (Google blog) (TechCrunch)

• Smallest AI launches Lightning V3 - 3.89 MOS in conversational evals, claims to beat OpenAI, Cartesia, and ElevenLabs. 15 languages with auto-detection and mid-sentence switching. Voice cloning from 5-15s of audio. (Smallest.ai blog)

• Amazon Polly adds Bidirectional Streaming - Stream text to Polly token-by-token as your LLM generates it, get audio back in real time over HTTP/2. 39% faster than batch approach, collapses 27 API calls to 1 on a 970-word passage. GA now. (AWS blog)

• AWS adds WebRTC to Bedrock AgentCore - Pipecat voice agents now run on AgentCore Runtime with bidirectional WebSocket and WebRTC. Supports barge-in. Ready-to-deploy examples with Pipecat, Nova Sonic, LiveKit, and Strands SDK. (AWS blog)

• Genesys reports record Q4 - Genesys Cloud at ~$2.6B ARR, 35%+ YoY growth. 70%+ of customers now on AI. AI-powered conversations up 120% YoY. AI is 20% of new ACV, with 10+ deals where AI exceeded half the contract value. (Genesys)

• Artificial Analysis updates voice benchmarks - AA-WER v2.0 adds conversational AI, EU Parliament speech, and financial call datasets. ElevenLabs Scribe v2 leads at 2.3% WER. Best value: Mistral Voxtral Small at 3.0% WER / $4 per 1K min. TTS Arena: Inworld TTS-1.5-Max at #1, ELO 1,160. (X post)

• AI chatbots handle 60%+ of banking support - BofA Erica: 1.5B+ interactions, 98% resolved without human. Klarna AI: 66% of inquiries, saving $40M/yr. Gartner projects $80B in contact center labor cost cuts in 2026. (TechBullion)

• The economics of AI vs human agents - Voice AI now costs ~$0.40/call vs $7-12 for a human agent: 90-95% cost reduction per interaction. Analysis of how this is reshaping contact center staffing. (Medium)

• Agentic Voice AI goes mainstream - 1 in 10 customer service interactions projected to be fully automated by agentic voice AI in 2026. 80% of businesses plan to deploy. RingCentral shipped AIR Pro, an agentic voice platform embedded in its comms stack. (Telecom Reseller)

• Salesforce Agentforce Contact Center - Native CCaaS unifying voice, digital channels, CRM, and AI agents in one stack. Voice now built into the CRM on Hyperforce. GA since Feb 23. (Cloud Wars)

• Otter.ai hits 35M users, $100M ARR - Sam Liang interview. $100M ARR with <200 employees ($500K+ rev/employee). #14 on Forbes 2026 Best Startup Employers. Liang: 2026 is “the year of the voice.” (YouTube)

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Engineering Corner 😎

• Gladia open-sources WER normalization library - Normalizes transcripts before computing WER to eliminate false penalties from formatting differences (”$50” vs “fifty dollars”). Configurable YAML pipelines for fair cross-engine ASR comparison. (GitHub) (LinkedIn - Gevorg Minasyan)

• MacWhisper - Mac-native local transcription using Whisper and Nvidia Parakeet. 300K copies sold. Batch processing, YouTube transcription, auto-recording Zoom/Teams/Webex. All on-device. (Trend Hunter)

• Logan Kilpatrick on Gemini 3 Flash - Google DeepMind’s Logan Kilpatrick discusses the latest Gemini model capabilities. (X post)

• Google Docs adds Gemini-powered audio proofreading - “Listen to this” reads docs aloud with AI voices. 0.5x-2x playback. Also ships audio summaries: condenses long docs into ~3min podcast-style recaps. Desktop, English only for now. (MakeUseOf)

• Rekam AI - All-in-one voice platform: TTS, STT, voice cloning, custom voice creation. 2,000+ voices, 20+ languages. Free unlimited tier for Kokoro models. (Dynamic Business)

• Klassifier - AI-powered audio classification tool. (Trend Hunter)

• ViciStack on call center AI voice agents - Overview of real-time conversation handling, reduced wait times, and automated workflows in production contact centers. (ViciStack)

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