STORY · PRODUKTER_
GPT-5.6 Sol Ultra produces better games than Claude Fable 5 in test
Simon Willison tested the same game prompt against both Claude Fable 5 and GPT-5.6 Sol Ultra via Codex Desktop. GPT-5.6 Sol Ultra produced a more advanced version of the Raccoon Heist game, where you must stack barrels to steal a golden sardine from a museum. The GPT-5.6 Sol version had a graphics bug that Willison had to fix manually.
WHY IT MATTERS
The test demonstrates how modern AI models are now capable enough to build fully functional games from natural language descriptions, and illustrates the strengths and limitations of different systems.
SOURCES
MACHINE-GENERATED SUMMARY This summary is written by machine from the sources below. We sort and explain — but we are a way into the field, not the final word. Check the source when something matters to you.