Independent benchmarks will determine whether IBM’s released Granite Speech 5.0 Turbo CTC provides accurate, unusually fast fully local transcription on modest hardware.
state: expiredheat: lowuncertainty: highknownscott: mediumlocal-speech speech-to-text open-models local-inferenceIBM Granite
What is this?
IBM has released Granite Speech 5.0 470M Turbo CTC, a compact automatic-speech-recognition model that removes the earlier LLM backbone in favor of a smaller, non-autoregressive design. IBM reports throughput near 12,600× real time on a single H100 GPU—roughly twice the cited Hugging Face Open ASR leaderboard leaders—but the supplied material does not independently verify its accuracy, speed on modest local hardware, or practical feature trade-offs. The snippets are also thin on release details and primarily reflect IBM’s own testing, so independent hardware and word-error-rate benchmarks remain decisive.
Why it matters to Scott
The radar already tracks the same independent-validation question for fully local ASR in “audio.cpp 0.4 local speech validation” and “NeMo-Speech.cpp local stack.” Granite is nevertheless a concrete evaluation candidate for Scott’s local speech-engine laboratory, Whisper-based pipelines, and hardware-aware inference work; it becomes actionable only if modest-hardware benchmarks establish a useful speed–accuracy advantage beyond IBM’s H100 claims.
dev:project.audiodev:technology.whisperdev:concept.hardware-aware-local-inferenceip:concept.evaluation-driven-developmentip:concept.voice-accelerated-thinkingradar:audio-cpp-0-4-local-speech-validationradar:nemo-speech-cpp-local-stackradar:concept.speech-to-textradar:concept.local-inferenceradar:concept.model-evaluation
queries asked of Scott's wikis
- local-first speech transcription architecture
- on-device ASR latency and accuracy trade-offs
- open speech models versus transcription APIs
- local inference economics on modest hardware
- speech-to-text pipelines for agent memory
- benchmarking claims for non-autoregressive models
Measured heat
no measured readings yet — the hourly heat pass fills this in
How the heat travelled
no chain yet — the hourly chain pass fills this in
Evidence (2) — ⭐ canonical anchor
Interpretation history
2026-08-30T01:23:34Z
The release has produced no independent modest-hardware benchmark or implementation within its initial evaluation window, so the validation episode has faded without answering the speed–accuracy hypothesis.
2026-08-28T00:26:59Z
No independent benchmark or implementation has appeared after the initial release window; repeated engagement updates add no validation. Granite remains a plausible local-ASR evaluation candidate, but the modest-hardware speed–accuracy hypothesis is unchanged and dormant.
2026-08-26T00:23:54Z
The refreshed discussion adds an English-only limitation and anecdotal dissatisfaction with earlier Granite ASR speed, but no Granite 5.0 implementation or independent benchmark. The decisive modest-hardware speed–accuracy question remains unanswered.
2026-08-25T20:35:55Z
The only new signal is modest engagement growth with no additional discussion, independent benchmarks, or implementation evidence. The release remains a credible evaluation candidate, but its Scott-relevant modest-hardware speed and accuracy claims are still wholly unvalidated.
2026-08-25T20:30:07Z
grounded: known/medium — The radar already tracks the same independent-validation question for fully local ASR in “audio.cpp 0.4 local speech validation” and “NeMo-Speech.cpp local stac
2026-08-25T20:26:27Z
case created — A first-party open-model release creates a concrete local-inference episode awaiting independent performance validation.
Decision trace
- 08-30 11:23expireThe release has produced no independent modest-hardware benchmark or implementation within its initial evaluation window, so the validation episode has faded without answering the speed–accuracy hypot
- 08-30 11:23alert_silentMax staleness is the only trigger and there is no consequential new evidence; the case can be reopened if an independent benchmark or usable local implementation appears.
- 08-30 11:23alert_routeMax staleness is the only trigger and there is no consequential new evidence; the case can be reopened if an independent benchmark or usable local implementation appears.
- 08-28 10:26repriceNo independent benchmark or implementation has appeared after the initial release window; repeated engagement updates add no validation. Granite remains a plausible local-ASR evaluation candidate, but
- 08-28 10:26alert_silentThere is no consequential new delta beyond engagement, so no alert is warranted; revisit if an independent modest-hardware benchmark or usable local implementation appears.
- 08-28 10:26alert_routeThere is no consequential new delta beyond engagement, so no alert is warranted; revisit if an independent modest-hardware benchmark or usable local implementation appears.
- 08-27 06:21sensor_dirtyengagement_update
- 08-27 01:21sensor_dirtyengagement_update
- 08-26 22:21sensor_dirtyengagement_update
- 08-26 20:21sensor_dirtyengagement_update
- 08-26 18:21sensor_dirtyengagement_update
- 08-26 17:21sensor_dirtyengagement_update
- 08-26 16:21sensor_dirtyengagement_update
- 08-26 15:21sensor_dirtyengagement_update
- 08-26 13:21sensor_dirtyengagement_update
- 08-26 11:21sensor_dirtyengagement_update
- 08-26 10:23repriceThe refreshed discussion adds an English-only limitation and anecdotal dissatisfaction with earlier Granite ASR speed, but no Granite 5.0 implementation or independent benchmark. The decisive modest-h
- 08-26 10:23alert_silentThe new comments provide minor product context but no validated performance result or consequential change beyond the already-routed release; this can wait for an independent benchmark or working loca
- 08-26 10:23alert_routeThe new comments provide minor product context but no validated performance result or consequential change beyond the already-routed release; this can wait for an independent benchmark or working loca
- 08-26 10:21sensor_dirtycomment_update
- 08-26 08:21sensor_dirtyengagement_update
- 08-26 07:21sensor_dirtyengagement_update
- 08-26 06:35repriceThe only new signal is modest engagement growth with no additional discussion, independent benchmarks, or implementation evidence. The release remains a credible evaluation candidate, but its Scott-re
- 08-26 06:35alert_silentThe release itself was already routed; this engagement-only update adds no consequential information and can wait for independent accuracy or modest-hardware performance results.
- 08-26 06:35alert_routeThe release itself was already routed; this engagement-only update adds no consequential information and can wait for independent accuracy or modest-hardware performance results.
- 08-26 06:33alert_shadowThe released model is a concrete, testable addition to Scott’s local speech-engine stack and its non-autoregressive CTC design could materially change modest-hardware latency. The release is establish
- 08-26 06:33alert_routeThe released model is a concrete, testable addition to Scott’s local speech-engine stack and its non-autoregressive CTC design could materially change modest-hardware latency. The release is establish
- 08-26 06:30groundThe radar already tracks the same independent-validation question for fully local ASR in “audio.cpp 0.4 local speech validation” and “NeMo-Speech.cpp local stack.” Granite is nevertheless a concrete e
- 08-26 06:26createA first-party open-model release creates a concrete local-inference episode awaiting independent performance validation.