GLM 5.3 API Cost: Always Thinking, 2.5x Cheaper per Answer Than 5.2
A developer benchmarked Z.ai's GLM 5.3 and GLM 5.3 Flash against GLM 5.2 and DeepSeek V4.1 Flash, finding that GLM 5.3 no longer allows thinking to be disabled — requests with thinking disabled or reasoning_effort set to…