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Head to head

GLM 5.3 Flashvsgpt-oss-20b

For tasks, about a month.

Verdict · measured basis

gpt-oss-20b costs $0.0003 per solved task against GLM 5.3 Flash at $0.0033 — ▼ 12x cheaper. Over 200 tasks that is $0.61 a month.

On output token price alone gpt-oss-20b looks 1.9x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for GLM 5.3 Flash and gpt-oss-20b
FigureGLM 5.3 Flashgpt-oss-20b
Input $/Mtok$0.075$0.03
Output $/Mtok$0.25$0.13
Cached input $/Mtok$0.015$0.03
Pass rate50%94%
Cost per solved task$0.0033measured$0.0003measured
Cost per month$0.67$0.05

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for gpt-oss-20b (measured, $0.0003 per solved task), GLM 5.3 Flash (measured, $0.0033 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.01$0.1$1$10$100TASKS / MONTH (log) →200 tasksgpt-oss-20b · MEASURED · $0.0003 per solved task$0.05GLM 5.3 Flash · MEASURED · $0.0033 per solved task$0.67— gpt-oss-20b · MEASURED— GLM 5.3 Flash · MEASURED

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

Solvency Bench (solvency.dev) — first-party measurement · verified 2026-08-26 · prices from each provider's pricing page; measured rows ignore the tier · Methodology · All models at these settings