Granite Speech 4.1 2B
Granite Speech 4.1 2B is a released long context and vision model with open-source and 128k context; evaluate it while provider pricing coverage matures.
Use it for
- Teams evaluating long context and vision
- Workloads that can use a 128k context window
Do not use it for
- Cost-sensitive launches that need sourced token pricing
- Strict JSON or tool-calling flows
- Teams that need a tracked hosted API route today
- Family
- Granite 4.1
- Released
- 2026-04-29
- Context
- 128k
- Parameters
- 2B
- Specialization
- speech-recognition
- Openness
- Open source
- License
- Apache 2.0OSI-approvedCommercial use: permitted
- Weights
- Available
- Code
- Unknown
No tracked provider token pricing is available yet.
About
IBM Granite Speech 4.1 2B is a multilingual ASR (Automatic Speech Recognition) and AST (Automatic Speech Translation) model trained on 174,000 hours of audio. ASR: English, French, German, Spanish, Portuguese, Japanese. Translation: X→English (French, German, Spanish, Portuguese, Japanese) and English→X (French, German, Spanish, Italian, Japanese, Mandarin Chinese). Features: punctuation/truecasing, keyword biasing, dual-head CTC encoder. Architecture: 16 conformer blocks + 2-layer window Q-former + Granite 4.0 1B LLM base (128K context). Variants: granite-speech-4.1-2b-plus (adds speaker-attributed ASR, word timestamps), granite-speech-4.1-2b-nar (non-autoregressive, higher throughput). Apache 2.0.
Top use-case fit
Long context
Included by capability and metadata signals in the decision map.
Vision
Included by capability and metadata signals in the decision map.
Provider price ladder
No tracked provider token pricing is available for this model yet.
Capabilities
Benchmark peer barsfor Long context
No task-mapped benchmark peers are available for this model yet.
Benchmark scores(2)
| Benchmark | Score | Version | Evaluation | Source |
|---|---|---|---|---|
| LibriSpeech WER (test-clean) | 1.3 | test-cleanObserved 2026-04-30 | — | Source |
| Open ASR Leaderboard (average WER) | 5.3 | avg-11-datasetsObserved 2026-04-30 | — | Source |
Migration checks
No linked migration route is available for this model yet.
No tracked provider token pricing is available yet.