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Head to head

GPT-5.6 LunavsGLM 5.3 Flash

For tasks, about a month.

Verdict · measured basis

GLM 5.3 Flash costs $0.0033 per solved task against GPT-5.6 Luna at $2.65 — ▼ 796x cheaper. Over 200 tasks that is $529 a month.

On output token price alone GLM 5.3 Flash looks 4.8x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for GPT-5.6 Luna and GLM 5.3 Flash
FigureGPT-5.6 LunaGLM 5.3 Flash
Input $/Mtok$0.2$0.075
Output $/Mtok$1.2$0.25
Cached input $/Mtok$0.02$0.015
Pass rate57%50%
Cost per solved task$2.65measured$0.0033measured
Cost per month$530$0.67

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for GLM 5.3 Flash (measured, $0.0033 per solved task), GPT-5.6 Luna (measured, $2.65 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.1$1$10$100$1k$10k$100kTASKS / MONTH (log) →200 tasksGLM 5.3 Flash · MEASURED · $0.0033 per solved task$0.67GPT-5.6 Luna · MEASURED · $2.65 per solved task$530— GLM 5.3 Flash · MEASURED— GPT-5.6 Luna · MEASURED

Solid measured · dashed modeled · dotted stale. The gap is the verdict.

Source: Artificial Analysis (artificialanalysis.ai) · verified 2026-08-21 · prices from each provider's pricing page; measured rows ignore the tier · Methodology · All models at these settings