OpenAIIBMAudio matchupSpeech to text
GPT-Transcribevs.Granite Speech 5.0 470M TurboCTC
Which model is better?
GPT-Transcribe is slightly ahead in independent tests, but the lead is not certain.
Pick GPT-Transcribe for
Pick Granite Speech 5.0 470M TurboCTC for
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
GPT-Transcribe slightly aheadGPT-Transcribe is clearly ahead in 0 of 9 subtests and slightly in 6, Granite Speech 5.0 470M TurboCTC in 0 clearly and slightly in 2. 1 is level.
Open ASR English short-form WER: Voxpopuli-AA-Cleaned
lower is better, as of October 28, 2026
Open ASR English short-form WER: Voice Arena Monsoon
lower is better, as of October 28, 2026
Open ASR English short-form WER: Private (scripted)
lower is better, as of October 28, 2026
Show all 9 subtests
| Subtest | GPT-Transcribe | Granite Speech 5.0 470M TurboCTC | Verdict |
|---|---|---|---|
| Open ASR English short-form WER: Voxpopuli-AA-Cleaned (lower is better) | 2.7 % | 4.9 % | GPT-Transcribe slightly ahead |
| Open ASR English short-form WER: Voice Arena Monsoon (lower is better) | 3.6 % | 4.8 % | GPT-Transcribe slightly ahead |
| Open ASR English short-form WER: Private (scripted) (lower is better) | 3.2 % | 4.1 % | GPT-Transcribe slightly ahead |
| Open ASR English short-form WER: AMI-Cleaned (lower is better) | 9.0 % | 7.7 % | Granite Speech 5.0 470M TurboCTC slightly ahead |
| Open ASR English short-form WER: Gigaspeech-Cleaned (lower is better) | 7.8 % | 8.7 % | GPT-Transcribe slightly ahead |
| Open ASR English short-form WER: URGENT24 (lower is better) | 12.9 % | 11.8 % | Granite Speech 5.0 470M TurboCTC slightly ahead |
| Open ASR English short-form WER: Private (conversational) (lower is better) | 12.9 % | 14.0 % | GPT-Transcribe slightly ahead |
| Open ASR English short-form WER: Average WER (11-set macro-average) (lower is better) | 6.0 % | 6.4 % | GPT-Transcribe slightly ahead |
| Open ASR English short-form WER: Earnings22-Cleaned-AA-chunked (lower is better) | 6.6 % | 6.8 % | level |
Source · latest October 28, 2026
All data side by side
Prices are verbatim from the provider, because audio models bill per minute, character or token.
| GPT-Transcribe | Granite Speech 5.0 470M TurboCTC | |
|---|---|---|
| Task | Speech to text | Speech to text |
| Developer | OpenAI | IBM |
| Status | Active | Open weights |
| Released | July 28, 2026 | August 25, 2026 |
| Weights | proprietary | open |
| Runs locally | no | yes |
| Parameters | n/a | 0.47 B |
| License | n/a | Apache-2.0 |
| Price | $0.0045 per audio minute | n/a |
| Popularity (out of 100) | 32 | 52 |