--- title: "AI models: Accent Translation" slug: "ai-models-accent-translation" tags: ["Accent Translation", "Release Notes", "Speech AI model", "Updates"] updated: 2026-07-03T13:23:46Z published: 2026-07-03T13:23:46Z canonical: "help.sanas.ai/ai-models-accent-translation" --- > ## Documentation Index > Fetch the complete documentation index at: https://help.sanas.ai/llms.txt > Use this file to discover all available pages before exploring further. # AI models: Accent Translation ### Introduction The following document lists Sanas' Accent Translation (AT) model releases. Versions are listed newest-first. Each entry summarizes what changed and who it affects. For desktop application releases that bundle these models, see [Product updates](/portalv3/docs/product-updates). For detailed benchmarking methodology and performance data, see [Sanas science blogs](https://www.sanas.ai/science). --- #### AT5 | **Field** | **Detail** | | --- | --- | | Model version | 5.0 & 5.1 | | Speech capability | Accent Translation | | Target accent | US English | | Source accent | Universal | | Release status | GA | | Minimum app version | 5.6.0 | **What changed** - Source accents are no longer limited to specific countries and geographies. They are now universally available and applicable across nearly all regions worldwide. - Real-time translation of incoming audio accents to improve comprehension. Inbound Accent Translation can be used independently or alongside Outbound Accent Translation. - Headset-based Model Detection for Accent Translation — Sanas now automatically applies the optimal voice-isolation mode based on the connected headset: - Wired USB headsets → Near-field mode - Bluetooth or other devices → General mode - For AT5.1, the following feature has been added: - Real-time translation of outgoing audio accents --- #### AT4.8 | **Field** | **Detail** | | --- | --- | | Model version | 4.8 | | Speech capability | Accent Translation | | Target accent | UK English | | Source accent | India, Filipino, Latin America, Africa, and the Middle East. | | Release status | Early access *Note: Enable the* ***"Experimental Features"*** *option on the Portal to access Early Access models.* | | Minimum app version | 4.3.14 | **What changed** - Production-ready UK English model. Addresses the primary issue of flat, inexpressive synthesis in the previous British (UK-EN) model. - Supports Source accent (India, Filipino, Latin American, African, and Middle Eastern). - Improved intelligibility for Latin American and African/Middle Eastern Source accent via an updated Middleweight Translator (quantized for production efficiency). - 8kHz output optimized for lightweight contact center deployments, paired with improved VAD for fewer hallucinations and voice breaks. --- #### AT4.6 | **Field** | **Detail** | | --- | --- | | Model version | 4.6 | | Speech capability | Accent Translation | | Target accent | US English | | Source accent | India, Filipino, Latin America, Africa, and the Middle East. | | Release status | Early access *Note: Enable the* ***"Experimental Features"*** *option on the Portal to access Early Access models.* | | Minimum app version | 4.3.14 | **What changed** - Significant intelligibility gains across all supported Source accent (India, Filipino, Latin American, African, and Middle Eastern), with the largest improvements for Middle Eastern and African English speakers. - Optimized Voice Activity Detection reduces hallucinations and voice breaks during pauses. - 8kHz output support for low-bandwidth telephony and contact center environments. --- #### AT4.4 | **Field** | **Detail** | | --- | --- | | Model version | 4.4 | | Speech capability | Accent Translation | | Target accent | UK English | | Source accent | India, Filipino, Latin America, Africa, and the Middle East. | | Release status | GA | | Minimum app version | 4.2.8 | **What changed** - First UK English output model. Targets modern Received Pronunciation (RP) for broad intelligibility across the UK and European markets. - Supports Indian, Filipino, Latin American, Middle Eastern, and African Source accent accents — validated through blind A/B evaluation with UK-based listeners who strongly preferred the RP output over the existing US model. - Expanded African source accent coverage, trained on a proprietary dataset spanning 30+ subregional accents across North, East, West, and South Africa. > [!TIP] > *Info: Superseded by* [*AT4.8*](/portalv3/docs/ai-models-accent-translation#at48)***.*** *AT 4.8 addresses expressiveness and synthesis quality issues identified in this model. New deployments should use AT 4.8.* --- #### AT4.3 | **Field** | **Detail** | | --- | --- | | Model version | 4.3 | | Speech capability | Accent Translation | | Target accent | US English | | Source accent | Africa and the Middle East. | | Release status | GA | | Minimum app version | 4.2.8 | **What changed** - Significant intelligibility improvement for African and Middle Eastern Source accent over AT 4.1, reducing WER from 29.0% to 24.5% for this accent group. - Finetuned on a Pan-African training dataset covering North, East, West, and South African regions, plus Caribbean accents. - Uses an AT 4.0-style Middleweight Translator with 8kHz output and CPU utilization comparable to AT 2.8. --- #### AT4.1 | **Field** | **Detail** | | --- | --- | | Model version | 4.1 | | Speech capability | Accent Translation | | Target accent | US English | | Source accent | India, Filipino, Latin America, Africa, and the Middle East. | | Release status | GA | | Minimum Sanas App version | 4.2.8 | **What changed** - Major intelligibility improvement over AT 2.9 across Indian, Filipino, and Latin American English speakers, measurable in lower Word Error Rates (WER) for downstream ASR systems. - Most natural-sounding AT model at time of release — improved intonation, pacing, and speaker similarity validated through large-scale blind A/B listening tests. - New Lightweight mode runs with 35% fewer parameters, enabling deployment on thin clients and older hardware without sacrificing clarity. --- ### Support **Need help?** Get in touch with our [Support Team](mailto:support@sanas.ai) for assistance. The desired English accent that the user’s speech is converted into for the listener. The Sanas App user’s natural spoken English accent that Sanas receives as input for translation.