whisper-large-v3-tulpar

A fine-tuned Whisper Large V3 model optimized for Kazakh (қазақ тілі) speech recognition.

"Жігіт - ісімен, ат - тұлпарымен." (A man is known by his deeds, a horse — by its spirit.)

We got tired of Whisper confusing Kazakh with Turkish and hallucinating random text, so we fixed it. 900+ hours of Kazakh speech, 4x H200 GPUs, and a lot of tea later — here we are.

What's this?

Full fine-tune of all 1.55B parameters of openai/whisper-large-v3 on ~900 hours of Kazakh speech data. Not LoRA, not adapters — the whole thing, because we had the GPU memory and the ambition.

Current WER: 10.62% on ISSAI KSC test set (down from ~20%+ with vanilla Whisper).

This is v2. We're not done yet.

Quick Start

from transformers import WhisperProcessor, WhisperForConditionalGeneration
import librosa

# Load
processor = WhisperProcessor.from_pretrained("olzhasAl/whisper-large-v3-turbo-kk")
model = WhisperForConditionalGeneration.from_pretrained("olzhasAl/whisper-large-v3-turbo-kk")
model.eval()

# Transcribe
audio, sr = librosa.load("kazakh_audio.wav", sr=16000)
inputs = processor(audio, sampling_rate=16000, return_tensors="pt")
forced_ids = processor.get_decoder_prompt_ids(language="kazakh", task="transcribe")

generated = model.generate(
    inputs.input_features,
    forced_decoder_ids=forced_ids,
    max_new_tokens=256,
    num_beams=5,
    no_repeat_ngram_size=4,
)

text = processor.batch_decode(generated, skip_special_tokens=True)[0]
print(text)

Training Details

Data Sources

Total: ~957 hours of verified Kazakh speech.

Preprocessing

• Audio: 16kHz mono WAV
• VAD: Silero VAD (float32, threshold=0.5)
• Segments: 5-30 seconds
• Language filtering: Kazakh-specific character detection (ә, і, ң, ғ, ү, ұ, қ, ө, һ)

Evaluation

Target: < 8% (v3), < 5% (v4+)

Tips & Tricks

For best results:

• Use num_beams=5 and no_repeat_ngram_size=4 — prevents repetition loops
• Set language="kazakh" explicitly — auto-detect may confuse KK with Turkish
• For mixed KK/RU audio: use this model for Kazakh segments + original Whisper for Russian segments

Known quirks:

• Language detection head is biased toward Kazakh (trained only on KK data)
• May hallucinate on pure Russian input — don't force language="kazakh" on Russian speech
• Code-switching (KZ↔RU within one sentence) is partially supported but not perfect yet

What's Next

• v3: Training on ~3000+ hours (more YouTube data, podcasts)
• Sub-8% WER target
• Better code-switching support
• KenLM integration for post-processing

Citation

@misc{whisper-large-v3-turbo-kk,
  author = {Olzhas Alseitov},
  title = {whisper-large-v3-turbo-kk: Fine-tuned Whisper for Kazakh Speech Recognition},
  year = {2026},
  publisher = {Hugging Face},
  url = {https://huggingface.co/olzhasAl/whisper-large-v3-turbo-kk}
}

License

Apache 2.0

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