IBM released Granite Speech 5.0 2B and refreshed its 470M Turbo CTC and 4.1 2B Plus models. All are Apache-2.0 with public weights and Transformers support. IBM reports multilingual transcription and translation, a 1.6x Turbo CTC speedup at similar accuracy, and better long-form and speaker-attributed error rates; those comparisons are vendor-run.
IBM releases open Granite Speech 5.0 models
2026-10-21Verified announcementTRIAL
IBM released Granite Speech 5.0 2B and refreshed its 470M Turbo CTC and 4.1 2B Plus models. All are Apache-2.0 with public weights and Transformers support. IBM reports multilingual transcription and translation, a 1.6x Turbo CTC speedup at similar accuracy, and better long-form and speaker-attributed error rates; those comparisons are vendor-run.
What this means for you
For teams that need local speech processing, the permissive license and multiple sizes create a practical alternative to hosted APIs. Accuracy, diarization and device throughput still need testing on real recordings.
Evidence & related material
Technical details & scores
| Models | Granite Speech 5.0 2B, 5.0 470M Turbo CTC, updated 4.1 2B Plus |
|---|---|
| License | Apache-2.0; ungated public weights |
| Support | Transformers; 2B also lists vLLM, llama.cpp and mlx-audio |
| Evidence Limit | WER, speed and diarization comparisons are IBM-run |
| Time Basis | official HF feed 2026-10-21T14:58:18Z; weights updated by 14:27Z |
Technical impact 4
Engineering value 4
Adoption signal 2
Maturity 3
Verification cost 2
Risk 2