Watch now | 🎙️GPT 5.6-Sol beats Fable on prototypes, PRDs, and browser use in my 5-category How I AI benchmark, and here's exactly where each model earns its spot.

OpenAI shipped GPT-5.6 with Sol, Terra, and Luna. But the real bottleneck in AI coding was never the model.

OpenAI dropped GPT-5.6 in three tiers. But the real problem in AI coding has not changed.