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The Domesday Book ofKWJ · AI

Whisper vs Gemini 2.5 Pro for Audio

Whisper for pure transcription at cost; Gemini for audio + understanding in one call.

Whisper
Open-weights speech recognition. The transcription backbone for most AI pipelines.

Use this when

Pure transcription, self-hosted pipeline, batch processing, cost sensitivity.

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Gemini 2.5 Pro
Google's reasoning flagship. Two-million-token context, native multimodal, the only frontier model that reads PDFs without an extraction pre-pass.

Use this when

Audio + Q&A in one call, long audio with comprehension required.

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Cost comparison

Whisper $0.006/min; Gemini audio billed at token rate.