{
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"path": "/t/custom-app-mcp-not-working-with-gpt-5-4-pro-only-with-regular-gpt-5-4/1378661#post_3",
"publishedAt": "2026-04-11T08:04:17.000Z",
"site": "https://community.openai.com",
"textContent": "Right now, GPT-5.4 Pro doesn’t handle MCP tools properly, which is why it’s not working. Instant mode supports tools better, so it works fine there.",
"title": "Custom App (MCP) not working with GPT 5.4 pro, only with regular GPT 5.4"
}