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Head to head

GPT-5.6 TerravsGLM 5.2

For tasks, about a month.

Verdict · measured basis

GPT-5.6 Terra costs $4.50 per solved task against GLM 5.2 at $15.49 — ▼ 3.4x cheaper. Over 200 tasks that is $2.2k a month.

On output token price alone GLM 5.2 looks 3.2x cheaper. The ranking reverses once you divide by pass rate — the cheaper tokens do not win the task.

Verified pricing, pass rate and cost per solved task for GPT-5.6 Terra and GLM 5.2
FigureGPT-5.6 TerraGLM 5.2
Input $/Mtok$2$1.19
Output $/Mtok$12$3.74
Cached input $/Mtok$0.2$0.221
Pass rate60%43%
Cost per solved task$4.50measured$15.49measured
Cost per month$900$3.1k

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for GPT-5.6 Terra (measured, $4.50 per solved task), GLM 5.2 (measured, $15.49 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$100$1k$10k$100k$1MTASKS / MONTH (log) →200 tasksGPT-5.6 Terra · MEASURED · $4.50 per solved task$900GLM 5.2 · MEASURED · $15.49 per solved task$3.1k— GPT-5.6 Terra · MEASURED— GLM 5.2 · 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