Chinese GLM-5.1 Model First to Beat GPT-5.4, Opus 4.6, and Gemini 3.1 Pro on Same Benchmark

Z.ai's GLM-5.1 topped SWE-Bench Pro by 0.7 points over Western flagship models while introducing sustained autonomous execution measured in hours rather than tokens. The model demonstrates 8-hour continuous operation capability, addressing practical deployment challenges that single-turn models cannot handle. This represents the first open-weight model to simultaneously outperform all major Western AI companies on a standardized benchmark.