# IBAN text-to-speech

Published articles for IBAN text-to-speech.

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## Gradium releases a TTS model with 81% accuracy on hard cases and 216 ms median time to first audio

DevFeed: [Gradium releases a TTS model with 81% accuracy on hard cases and 216 ms median time to first audio](<https://devfeed.tech/articles/gradium-tts-you-no-longer-have-to-choose-between-latency-and-accuracy-81228.md>)

Original publisher: [Read original article](<https://gradium.ai/blog/gradium-tts-latency-and-accuracy>)

Author: Gradium

Published: 2026-08-31T00:00:00Z

Content type: release

Language: en

Sources: [Gradium](<https://devfeed.tech/sources/gradium.md>)

Topics: [AI Chat](<https://devfeed.tech/topics/ai-chat.md>), [Conversational AI](<https://devfeed.tech/topics/conversational-ai.md>), [livekit](<https://devfeed.tech/topics/livekit.md>)

Tags: [best-tts-for-voice-agents](<https://devfeed.tech/tags/best-tts-for-voice-agents.md>), [cartesia-sonic-3-6](<https://devfeed.tech/tags/cartesia-sonic-3-6.md>), [coval-tts-benchmark](<https://devfeed.tech/tags/coval-tts-benchmark.md>), [elevenlabs-v3-conversational](<https://devfeed.tech/tags/elevenlabs-v3-conversational.md>), [email-address-text-to-speech](<https://devfeed.tech/tags/email-address-text-to-speech.md>), [evaluation](<https://devfeed.tech/tags/evaluation.md>), [fish-audio-s2-1-pro](<https://devfeed.tech/tags/fish-audio-s2-1-pro.md>), [gradium-tts](<https://devfeed.tech/tags/gradium-tts.md>), [gradium-vs-cartesia](<https://devfeed.tech/tags/gradium-vs-cartesia.md>), [gradium-vs-elevenlabs](<https://devfeed.tech/tags/gradium-vs-elevenlabs.md>), [gradium-vs-fish-audio](<https://devfeed.tech/tags/gradium-vs-fish-audio.md>), [gradium-vs-inworld](<https://devfeed.tech/tags/gradium-vs-inworld.md>), [hard-case-tts-evaluation](<https://devfeed.tech/tags/hard-case-tts-evaluation.md>), [iban-text-to-speech](<https://devfeed.tech/tags/iban-text-to-speech.md>), [inworld-realtime-tts-2](<https://devfeed.tech/tags/inworld-realtime-tts-2.md>), [latency](<https://devfeed.tech/tags/latency.md>), [latency-accuracy-tradeoff](<https://devfeed.tech/tags/latency-accuracy-tradeoff.md>), [multilingual-text-to-speech](<https://devfeed.tech/tags/multilingual-text-to-speech.md>), [phone-number-text-to-speech](<https://devfeed.tech/tags/phone-number-text-to-speech.md>), [real-time-tts](<https://devfeed.tech/tags/real-time-tts.md>), [research](<https://devfeed.tech/tags/research.md>), [spelling-text-to-speech](<https://devfeed.tech/tags/spelling-text-to-speech.md>), [text-normalization-tts](<https://devfeed.tech/tags/text-normalization-tts.md>), [text-to-speech-accuracy](<https://devfeed.tech/tags/text-to-speech-accuracy.md>), [time-to-first-audio](<https://devfeed.tech/tags/time-to-first-audio.md>), [ttfa-p50](<https://devfeed.tech/tags/ttfa-p50.md>), [tts-accuracy-comparison](<https://devfeed.tech/tags/tts-accuracy-comparison.md>), [tts-hard-case-comparison-2026](<https://devfeed.tech/tags/tts-hard-case-comparison-2026.md>), [tts-latency](<https://devfeed.tech/tags/tts-latency.md>), [tts-pass-rate-benchmark](<https://devfeed.tech/tags/tts-pass-rate-benchmark.md>), [voice-agent-tts](<https://devfeed.tech/tags/voice-agent-tts.md>), [voice-agents](<https://devfeed.tech/tags/voice-agents.md>)

### AI overview

Gradium's new default text-to-speech model scores 81% on a 500-sentence evaluation of difficult spoken content across five languages. Its median time to first audio is 216 ms on Coval, with a 30 ms p75-p25 spread across 480 runs. Gradium says the model handles phone numbers, email addresses, IBANs, dates, and reference codes without preprocessing or text normalization; its evaluation dataset is publicly available.

### Source excerpt

A new Gradium TTS model is available today, and it is now the default. It reads the cases that break voice agents in production, phone numbers, email addresses, IBANs, with no pre-processing or text normalization on your side. Time to first audio (TTFA) P50 is 216 ms on Coval, 170 ms faster than the model it replaces, with a 30 ms p75 - p25 spread, the tightest of the five models tested. Here is the hard-case evaluation set, the head-to-head samples, and how to hear the difference yourself.

## Gradium TTS public beta handles complex text without pre-processing

DevFeed: [Gradium TTS public beta handles complex text without pre-processing](<https://devfeed.tech/articles/gradium-tts-public-beta-open-for-your-hardest-cases-81229.md>)

Original publisher: [Read original article](<https://gradium.ai/blog/gradium-tts-public-beta>)

Author: Gradium

Published: 2026-07-30T00:00:00Z

Content type: release

Language: en

Sources: [Gradium](<https://devfeed.tech/sources/gradium.md>)

Topics: [vercel ai sdk](<https://devfeed.tech/topics/vercel-ai-sdk.md>), [Large Language Model](<https://devfeed.tech/topics/llm.md>)

Tags: [api](<https://devfeed.tech/tags/api.md>), [custom-voice-cloning](<https://devfeed.tech/tags/custom-voice-cloning.md>), [email-address-text-to-speech](<https://devfeed.tech/tags/email-address-text-to-speech.md>), [feedback](<https://devfeed.tech/tags/feedback.md>), [gradium-tts](<https://devfeed.tech/tags/gradium-tts.md>), [gradium-tts-beta](<https://devfeed.tech/tags/gradium-tts-beta.md>), [gradium-tts-public-beta](<https://devfeed.tech/tags/gradium-tts-public-beta.md>), [iban-text-to-speech](<https://devfeed.tech/tags/iban-text-to-speech.md>), [phone-number-text-to-speech](<https://devfeed.tech/tags/phone-number-text-to-speech.md>), [public-beta](<https://devfeed.tech/tags/public-beta.md>), [real-time-tts](<https://devfeed.tech/tags/real-time-tts.md>), [research](<https://devfeed.tech/tags/research.md>), [streaming-text-to-speech-api](<https://devfeed.tech/tags/streaming-text-to-speech-api.md>), [text-normalization-tts](<https://devfeed.tech/tags/text-normalization-tts.md>), [text-to-speech-beta](<https://devfeed.tech/tags/text-to-speech-beta.md>), [time-expressions-tts](<https://devfeed.tech/tags/time-expressions-tts.md>), [tts](<https://devfeed.tech/tags/tts.md>), [tts-pronunciation-accuracy](<https://devfeed.tech/tags/tts-pronunciation-accuracy.md>), [voice-agent-tts](<https://devfeed.tech/tags/voice-agent-tts.md>)

### AI overview

Gradium has released a public beta of its text-to-speech model that natively handles complex text such as phone numbers, email addresses, IBANs and time expressions without requiring developers to normalize the input. The model is available through the API, and beta participants who submit feedback receive 1 million Gradium credits.

### Source excerpt

A new Gradium TTS model is available today in public beta. It keeps improving on the current production model, handling the complex cases natively, phone numbers, email addresses, IBAN numbers, time expressions and more, with no pre-processing or text normalization on your side. Anyone can test it through the API, and everyone who sends us feedback during the beta receives 1M Gradium credits.