Fact · Speech recognition
0.142character error rate
In a 2025 study of 200 verses from Juz 30 of the Quran, Whisper reached an average character error rate of 0.142, which the authors describe as about 85 percent transcription accuracy.
Checked against its source on October 17, 2026
In the source's own words
“Whisper achieved an average CER of 0.142, corresponding to a transcription accuracy of about 85%”
Evaluating End-to-End ASR for Qur'an recitation using whispers in low resource settings, Azzam Abdullah et al., Bulletin of Computer Science Research, 2025, Abstract.
Open the original- What it measures
- The authors built a curated dataset of 200 short verses with a consistent structure, and ran Whisper in Google Colaboratory. The study was run under low-resource conditions.
- What it does not show
- A small study on one part of the Quran. Character error rate counts letters, so it is not comparable to word error rate in other studies. The abstract does not report tajweed or pronunciation-rule accuracy.