GLM-5.2 API Pricing & Cost Calculator

How this is calculated

GLM-5.2 is priced at $1.40 per million input tokens and $4.40 per million output tokens on Z.ai's official list, with an ~81% prompt caching discount ($0.26 per million cached reads). That puts it cheaper than Gemini 3.6 Flash ($1.50/$7.50) on both axes and below GPT-5.6 Terra's list price on input.

Verdict

GLM-5.2's $1.40/M input and $4.40/M output sit below Gemini 3.6 Flash ($1.50/$7.50) on both rows, with the ~81% cache discount dropping cached input to $0.26/M. The 1M context window is what makes the value case: long-document analysis, agentic loops with large persistent context blocks, and RAG over substantial corpora fit in a single call without chunking. The trade against Gemini Flash is the shallower cache discount (81% vs 90%) and no published batch discount, so workloads with very high cache hit rates or batch-mode jobs may still favor Flash, but for output-heavy text and document work GLM-5.2's $4.40 output row wins on absolute dollar cost.