Fact · Speech recognition
11.35percent word error rate
In the Voxtral paper's Table 3, GPT-4o mini Transcribe had a word error rate of 11.35 percent on CHiME-4.
Quote found word for word on the live source, last checked October 19, 2026
In the source's own words
“Model LS-C LS-O GS VP SB C-4 SPGI E21 10m E22 10m ... GPT4o mini Transcribe 1.92 4.70 14.80 7.34 17.31 11.35 4.51 10.09 12.27”
Voxtral, Mistral AI, arXiv (Audio and Speech Processing), 2025, Table 3 (short-form English), CHiME-4 column.
Open the original- What it measures
- Table 3 of the paper gives word error rate for each English test set. The paper calls the Voxtral results macro-averages in its figures, and this row is one test set.
- What it does not show
- One paper's runs under its own text normalization and decoding, so compare systems within this table, not with other papers' numbers. The paper gives no date per row.
In the data
A row of Speech Recognition Accuracy: Word Error Rates, as GPT-4o mini Transcribe, CHiME-4 English: 11.35 percent.
- System
- GPT-4o mini Transcribe
- Kind
- Cloud service
- Test set
- CHiME-4
- Language
- English
- Speech
- Noisy or distant
- Year
- 2025