IBM's Granite Speech 5.0 shipped a 2B model trained on 390,000 hours of audio, plus a multilingual edge model and better speaker attribution
AspireAI community · IBM Granite on Hugging Face
IBM updated its Granite Speech collection with three models covering the enterprise speech range. granite-speech-5.0-2b is the successor to granite-speech-4.1-2b at the same parameter count, trained on 390,000 hours of public audio plus synthetic data built for Japanese ASR, keyword biasing and translation - it transcribes English, French, German, Spanish, Portuguese and Japanese, translates to and from English in those languages plus English to Italian and Mandarin, and adds language-ID prompting and 2,000-term keyword biasing. granite-speech-5.0-470m-turboctc becomes multilingual with native punctuation and capitalization and more robustness to noise and reverb for high-throughput and on-device transcription, and granite-speech-4.1-2b-plus improves speaker attribution, timestamps and long-speech handling for cases where who spoke and when matter as much as what was said. The post is a release announcement: it makes accuracy claims qualitatively and without benchmark tables.
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Two sparse-autoencoder analyses have resisted scaling: matching semantically similar features across layers, and compressing large feature circuits into interpretable supernodes. This paper argues both are the same underlying problem, estimating semantic distances between SAE features that sit on different activation manifolds. Its representation treats each feature not as a single decoder vector but as an activation-weighted distribution over the hidden states expressing it, projects those distributions into a shared reference space, and compares them with Wasserstein distance. The representation is proved invariant to activation rescaling and stable under perturbation, and recovers true matches under finite-sample margin conditions. Empirically it outperformed decoder-vector and LLM-based baselines and captured subtle functional distinctions between related features, and it compressed large feature circuits into interpretable supernodes automatically. The limitation is that this is interpretability tooling: the paper demonstrates better feature matching and circuit compression, not that downstream interpretability claims become more accurate.