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Head to head

Claude Opus 5vsGLM-5.3

For tasks, about a month.

Verdict · measured basis

Claude Opus 5 costs $0.10 per solved task against GLM-5.3 at $0.10 — ▼ 1.0x cheaper. Over 200 tasks that is $0.13 a month.

On output token price alone GLM-5.3 looks 5.7x 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 Claude Opus 5 and GLM-5.3
FigureClaude Opus 5GLM-5.3
Input $/Mtok$5$1.4
Output $/Mtok$25$4.4
Cached input $/Mtok$0.5$0.26
Pass rate100%33%
Cost per solved task$0.10measured$0.10measured
Cost per month$19$20

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for Claude Opus 5 (measured, $0.10 per solved task), GLM-5.3 (measured, $0.10 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$1$10$100$1k$10kTASKS / MONTH (log) →200 tasksClaude Opus 5 · MEASURED · $0.10 per solved task$19GLM-5.3 · MEASURED · $0.10 per solved task$20— Claude Opus 5 · MEASURED— GLM-5.3 · MEASURED

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

Solvency Bench (solvency.dev) — first-party measurement · verified 2026-08-21 · prices from each provider's pricing page; measured rows ignore the tier · Methodology · All models at these settings