Godot 4 answers and model tests, run on the engine

Godot Facts answers Godot 4 errors, warnings and how-to questions with scripts that were run on the engine, and measures which AI models write Godot 4 code that works. Every page shows what Godot printed, verbatim.

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Which models write working Godot 4 code

The top of the table: 15 Godot 4 tasks, each script run headless on the engine.

ModelMakerRun onTasks passedFirst tryCost of the run
Claude Opus 5.5Anthropic15 of 1515–
Claude Sonnet 5.5Anthropic15 of 1515–
GPT-6.1 SolOpenAI15 of 1515–
Claude Haiku 4.5Anthropic14 of 1511–

All 4 models, the method and the dataset