Fable 5 vs GLM 5.2 vs GPT-5.6: The 2026 Frontier Landscape
Three frontier models landed in June 2026: Claude Fable 5, Z.ai's open-weight GLM-5.2, and OpenAI's limited-preview GPT-5.6. The numbers do not all measure the same thing, so here is an honest, dated comparison on coding score, price, and openness.
