ChatGPT Handles Audio Transfers, Claude Falls Short

tleyden · reddit · 2026-07-09

The author is developing an MCP service for audio transcription where the client sends a file and the server returns text. Tests show it works flawlessly in ChatGPT using temporary download links and file IDs. However, Claude seems to only support base64 transfers; a 3-minute audio file bloats to roughly 517KB and nearly 140,000 tokens, causing the Claude iOS app to reject it and require a manual upload.

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