{
  "$type": "site.standard.document",
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  "path": "/t/custom-gpt-actions-work-in-text-but-never-execute-in-voice-mode-invalidrecipient-unrecognized-recipient/1385102#post_1",
  "publishedAt": "2026-06-28T04:01:25.000Z",
  "site": "https://community.openai.com",
  "textContent": "Hi,\n\nI’m trying to determine whether this is a known limitation or a bug.\n\nI created a minimal Custom GPT with a single GET Action using the following OpenAPI:\n\n\n    openapi: 3.1.0\n    info:\n      title: Test Voice API\n      version: 1.0.0\n    servers:\n      - url: https://httpbin.org\n    paths:\n      /get:\n        get:\n          operationId: testGet\n          responses:\n            \"200\":\n              description: OK\n\n\n\nGPT instructions:\n\n> Whenever the user says “test”, always call the action `testGet`.\n\n## Results\n\n**Text mode**\n\n  * Works correctly.\n\n  * The Action executes and the HTTP request reaches httpbin.\n\n\n\n\n**Advanced Voice Mode** (Android app and ChatGPT Web using a microphone)\n\n  * The Action is never executed.\n\n  * The assistant reports a technical issue.\n\n  * No HTTP request reaches the server.\n\n\n\n\nAdditional observation:\n\nIf I type **“continue”** immediately after the failed voice interaction, ChatGPT is sometimes able to inspect its previous attempt and reports that it encountered:\n\n**InvalidRecipient**\n**Unrecognized recipient: httpbin_org__jit_plugin**\n\nThis suggests the failure may occur before any HTTP request is sent.\n\nI first observed this with my own FastAPI backend, then reproduced it with the public `httpbin.org` endpoint, so it doesn’t appear to be API-specific.\n\nHas anyone successfully executed Custom GPT Actions from Advanced Voice Mode recently?\n\nIf yes:\n\n  * Android / iOS / Web?\n\n  * Which model?\n\n  * Any specific configuration?\n\n\n\n\nThanks!",
  "title": "Custom GPT Actions work in text but never execute in Voice Mode (InvalidRecipient : Unrecognized recipient))"
}