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IBMAudio matchupSpeech to text

Granite Speech 5.0 470M TurboCTCvs.Granite Speech 5.0 470M TurboCTC NC

Which model is better?

Granite Speech 5.0 470M TurboCTC NC is slightly ahead in independent tests, but the lead is not certain.

Independent tests
Granite Speech 5.0 470M TurboCTC0 of 1
Granite Speech 5.0 470M TurboCTC NC0 of 1
Hugging Face Open ASR
Popularity
Granite Speech 5.0 470M TurboCTC52
Granite Speech 5.0 470M TurboCTC NC50
out of 100
Weights and access
Granite Speech 5.0 470M TurboCTCopen, local
Granite Speech 5.0 470M TurboCTC NCopen, local
Size
Granite Speech 5.0 470M TurboCTC0.47 B
Granite Speech 5.0 470M TurboCTC NC0.47 B
Parameters

Pick Granite Speech 5.0 470M TurboCTC for

No clear edge

Pick Granite Speech 5.0 470M TurboCTC NC for

leaning Hugging Face Open ASR

Shared tests

Independent evaluators and leaderboards only, the newest shared snapshot per evaluator. With 95 % ranges a lead counts when they do not overlap; for hit rates, when it holds in a 95 % test. Without any uncertainty figure at most “slightly ahead”.

Hugging Face Open ASR

Granite Speech 5.0 470M TurboCTC NC slightly ahead

Granite Speech 5.0 470M TurboCTC NC is clearly ahead in 0 of 15 subtests and slightly in 12, Granite Speech 5.0 470M TurboCTC in 0 clearly and slightly in 2. 1 is level.

Open ASR English short-form WER: SPGISpeech

Granite Speech 5.0 470M TurboCTC3.2 %
Granite Speech 5.0 470M TurboCTC NC1.8 %

lower is better, as of October 28, 2026

Open ASR English short-form WER: Earnings22-Cleaned-AA-chunked

Granite Speech 5.0 470M TurboCTC6.8 %
Granite Speech 5.0 470M TurboCTC NC8.2 %

lower is better, as of October 28, 2026

Open ASR leaderboard English short-set WER: Earnings-22

Granite Speech 5.0 470M TurboCTC6.8 %
Granite Speech 5.0 470M TurboCTC NC8.1 %

lower is better, as of October 16, 2026

Show all 15 subtests
SubtestGranite Speech 5.0 470M TurboCTCGranite Speech 5.0 470M TurboCTC NCVerdict
Open ASR English short-form WER: SPGISpeech (lower is better)3.2 %1.8 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR English short-form WER: Earnings22-Cleaned-AA-chunked (lower is better)6.8 %8.2 %Granite Speech 5.0 470M TurboCTC slightly ahead
Open ASR leaderboard English short-set WER: Earnings-22 (lower is better)6.8 %8.1 %Granite Speech 5.0 470M TurboCTC slightly ahead
Open ASR English short-form WER: URGENT24 (lower is better)11.8 %10.2 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR English short-form WER: Voice Arena Monsoon (lower is better)4.8 %4.3 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR English short-form WER: Private (scripted) (lower is better)4.1 %3.8 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR leaderboard English short-set WER: AMI (lower is better)7.7 %7.1 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR English short-form WER: Average WER (11-set macro-average) (lower is better)6.4 %6.0 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR English short-form WER: AMI-Cleaned (lower is better)7.7 %7.3 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR leaderboard English short-set WER: GigaSpeech (lower is better)8.7 %8.3 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR leaderboard English short-set WER: VoxPopuli (lower is better)4.9 %4.7 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR English short-form WER: Voxpopuli-AA-Cleaned (lower is better)4.9 %4.7 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR English short-form WER: Gigaspeech-Cleaned (lower is better)8.7 %8.4 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR English short-form WER: Private (conversational) (lower is better)14.0 %13.5 %Granite Speech 5.0 470M TurboCTC NC slightly ahead
Open ASR English short-form WER: LS Other (lower is better)2.7 %2.7 %level

Source · latest October 28, 2026

Vendor figures

Figures from vendor reports that cover both models. They do not count toward the verdict.

Show 10 vendor figures
FigureSourceGranite Speech 5.0 470M TurboCTCGranite Speech 5.0 470M TurboCTC NC
WER (lower is better)IBM Granite Speech announcement5.0 %4.9 %
FFASR average WER: High SNR (lower is better)IBM Granite Speech model card, FFASR WER figure10.5 %9.1 %
FFASR average WER: Lab Meas. (lower is better)IBM Granite Speech model card, FFASR WER figure26.2 %23.1 %
FFASR average WER: Lab Sim. (lower is better)IBM Granite Speech model card, FFASR WER figure24.9 %22.1 %
FFASR average WER: Low SNR (lower is better)IBM Granite Speech model card, FFASR WER figure35.7 %32.9 %
FFASR average WER: Mid SNR (lower is better)IBM Granite Speech model card, FFASR WER figure19.3 %16.7 %
FFASR average WER: Mov. High (lower is better)IBM Granite Speech model card, FFASR WER figure11.5 %10.2 %
FFASR average WER: Mov. Low (lower is better)IBM Granite Speech model card, FFASR WER figure37.2 %33.4 %
FFASR average WER: Mov. Mid (lower is better)IBM Granite Speech model card, FFASR WER figure21.5 %18.7 %
FFASR average WER: Near Field (lower is better)IBM Granite Speech model card, FFASR WER figure4.8 %4.3 %

All data side by side

Prices are verbatim from the provider, because audio models bill per minute, character or token.

Granite Speech 5.0 470M TurboCTCGranite Speech 5.0 470M TurboCTC NC
TaskSpeech to textSpeech to text
DeveloperIBMIBM
StatusOpen weightsOpen weights
ReleasedAugust 25, 2026August 25, 2026
Weightsopenopen
Runs locallyyesyes
Parameters0.47 B0.47 B
LicenseApache-2.0CC-BY-NC-SA-4.0
Popularity (out of 100)5250

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