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A physics test by Atomic Chat shows GPT-5.6 Sol Ultra is three times more expensive than GPT-5.5 with no clear advantage in HTML5 canvas physics demos, highlighting weaknesses in physics simulation despite higher cost.
Tencent's new Hunyuan Hy3 model achieves Gemini 3.5-level physics quality at 35x lower cost, based on a test comparing simulations in atomic.chat.
A comparison of four AI models (Fable 5, Opus 4.8, GLM 5.2, GPT 5.5) on generating HTML5 canvas physics demos shows Fable 5 outperforms others in quality but costs significantly more per test.
Atomic Chat is now available as a Local App on Hugging Face, allowing users to run 200,000+ open-weight models privately and locally on their devices.