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OpenAI: GPT-6 Luna Pro (batch) vs Z.ai: GLM Flash Latest

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.

OpenAI: GPT-6 Luna Pro (batch) Z.ai: GLM Flash Latest
Vendoropenai~z-ai
Quality Score100100
Input Price$0.05/M$0.07/M
Output Price$0.25/M$0.25/M
Context Window1,050,0001,310,720
Max Output128,000131,072
Tool Calling
Structured Output
Reasoning Mode
Vision
Audio--

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