IBM Updates Its Granite Speech Model Lineup
- IBM has added granite-speech-5.0-2b to Granite Speech and revised the granite-speech-5.0-470m-turboctc and granite-speech-4.1-2b-plus models.
- The new 2B model transcribes English, French, German, Spanish, Portuguese, and Japanese. It translates between English and those languages, and from English into Italian and Mandarin.
- The revised Turbo CTC keeps its 470M-parameter footprint, adds multilingual transcription and built-in punctuation and capitalization, and records 19,870 RTFx on the Open ASR Leaderboard.
- The updated granite-speech-4.1-2b-plus retains its architecture, prompt format, and API. Its WER on long-form tests falls 24%, while errors on keywords supplied in 20-term lists drop 45%.
Our take
Teams using granite-speech-4.1-2b-plus can evaluate its updated weights without changing their API integration, limiting migration work. The source does not establish API compatibility between granite-speech-5.0-2b and earlier releases, so teams should check prompt and runtime behavior before switching.
Sources
Corrections and updates
- Correction Oct 22, 2026
granite-speech-5.0-2b transcribes English, French, German, Spanish, Portuguese, and Japanese; it translates between English and those languages, and from English into Italian and Mandarin. Turbo CTC retains its 470M-parameter footprint and adds native punctuation and capitalization; updated granite-speech-4.1-2b-plus reduces long-form WER by 24% and biased-keyword errors by 45% with 20-term lists. (Corrected based on the updated source.)
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