Since GPT-5.6 Luna is currently available for free on ChatGPT, I've been meaning to experimenting a bit with it. Here is a test on the full version of Maniac Mansion, comparing 2 coding harnesses, Pi (https://pi.dev) and OpenAI's official coding harness, Codex (https://github.com/openai/codex)
Model: OpenAI ChatGPT 5.6 Luna (thinking high)
Here is another video of Claude Opus 5 playing against Luna (on different reasoning levels to make it fair): https://www.youtube.com/watch?v=h4eGj12wRAE
This is using this MCP server built on top of ScummVM: https://github.com/xavierhardy/scummvm-mcp
Enjoy!
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