AI Assistant: OpenAI Subscription Cloud API Provider Fails Connection Test with “Stream must be set to true”

Cannot set up OpenAI Subscription as a Cloud API provider in AI Assistant.

It errors out when I hit Test Connection button:{"detail":"Stream must be set to true"}.


Screenshots


Device information:

  • Type of Mac: MacBook Air M4
  • macOS version: macOS sequoia 15.8rc2 (24H20)
  • BetterTouchTool version: 6.760(2026082704)

btw the Codex CLI setup does work.