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GLM 5.3 Flash price cut: output $0.50 → $0.25 per 1M tokens

Z.ai's GLM 5.3 Flash changed its list price between Sep 14, 2026 and Sep 21, 2026: input $0.15 → $0.075 and output $0.50 → $0.25 per 1M tokens (-50%).

What it means per task

Same tokens as today's measurement, old price vs new price.

TaskBeforeAfterPer 1,000 tasks
Answer a chat question0.09¢0.04¢$0.90 → $0.45
Reply to a customer email0.02¢<0.01¢$0.17 → $0.08
Write a 1,500-word blog post0.35¢0.17¢$3.47 → $1.74
Write 10 product descriptions0.36¢0.18¢$3.56 → $1.78
Translate 1,000 words0.53¢0.26¢$5.28 → $2.64
Proofread one page (500 words)0.05¢0.03¢$0.51 → $0.25
Summarize a 20-page PDF0.29¢0.14¢$2.86 → $1.43
Extract data from an invoice0.06¢0.03¢$0.57 → $0.29
Analyze a 200-row spreadsheet0.87¢0.44¢$8.73 → $4.37
Answer from 5 retrieved documents (RAG)0.15¢0.08¢$1.54 → $0.77
Classify 100 support tickets0.41¢0.21¢$4.12 → $2.06
Review 500 lines of code0.87¢0.43¢$8.68 → $4.34
Write a SQL query0.08¢0.04¢$0.82 → $0.41
Run a 50-step coding agent36¢18¢$358 → $179