granite-speech-5.0-2b, granite-speech-5.0-470m-turboctc, granite-speech-4.1-2b-plus

Change history

21 Oct 2026

IBM refreshes Granite Speech lineup: new ASR model, quicker edge transcription, sharper speaker attribution

Parameter	Before	Now
granite-speech-5.0-2b WER	Not specified (succeeds granite-speech-4.1-2b)	5.06% average English WER, #2 open-weight ASR on leaderboard
Turbo CTC speed (RTFx)	~12,600 RTFx at launch	19,870 RTFx (roughly 1.6x faster at same accuracy)
Turbo CTC languages	English only	English, Japanese, Spanish, German, French, Italian, Portuguese
4.1-2B-Plus WDER/cpWER	WDER 4.40, cpWER 30.50	WDER 4.10, cpWER 28.48 (7% drop each)
4.1-2B-Plus long-form WER	13.53	10.22 (24% lower)
4.1-2B-Plus keyword biasing WER (20-term)	11.79	6.48 (45% lower)
4.1-2B-Plus timestamp shift (AAS, all speech)	210.86	98.54

News

Voice AI· Important· 🧪 Worth Testing

IBM refreshes Granite Speech lineup: new ASR model, quicker edge transcription, sharper speaker attribution

IBM rolled out three updates to its Granite Speech family: a brand-new 2B speech-language model (granite-speech-5.0-2b), a revised 470M Turbo CTC model built for speed, and an improved 4.1-2B-Plus model tuned for multi-speaker recordings. Together they target high-accuracy transcription/translation, fast on-device recognition, and accurate speaker/timestamp labeling. All three remain under Apache 2.0.

4 hours agoHugging Face