OpenAI Agents Python 0.20.0 — from issue No. 006nofeed.dev
Issue No. 006 · 11 August 2026
Breaking

OpenAI Agents Python 0.20.0

Implicit default model is now gpt-5.6-luna. Explicit model strings, run-level overrides and OPENAI_DEFAULT_MODEL still win. Local MCP supports Python SDK v1 and v2; apps with custom MCP HTTP auth or client factories must use the HTTP types of the installed MCP major, or pin mcp<2.9

MATTERS TO · anyone who depended on the previous default model without setting one
WHAT THE VERDICT MEANS
Will break existing code: deprecation or API change.

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