whisper medium.en: transcribe.cpp GGUF GGUF conversions of openai/whisper medium.en for use with transcribe.cpp. Ported from upstream commit 2e98eb6, pinned 2026 04 25. Validated against the transformers reference at transcribe.cpp commit 5.6.1 on 2026 04 26. OpenAI Whisper medium.en — converted to GGUF for transcribe.cpp. English only; faster than the multilingual model at the same size. Encoder decoder transformer; 30 second windows with chunked long form decoding. Downloads Quantization Download Size WER (LibriSpeech test clean) : : F32 whisper medium.en F32.gguf 2.85 GB 2.74% F16 whisper medium.en F16.gguf 1.44 GB 2.73% Q8 0 whisper medium.en Q8 0.gguf 793 MB 2.72% Q6 K whisper medium.en Q6 K.gguf 618 MB 2.83% Q5 K M whisper medium.en Q5 K M.gguf 556 MB 2.74% Q4 K M whisper medium.en Q4 K M.gguf 481 MB 2.91% WER measured on the full LibriSpeech test clean split (2620 utterances) with the transcribe.cpp default decode (greedy, suppress tokens, temperature fallback, segment timestamps enabled). OpenAI's self reported number on the same split is 3.02%. We don't know upstream's exact eval config, but the most likely cause of any divergence is that OpenAI's model.generate() defaults…
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