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Head to head

gpt-oss-20bvsGemma 3 4B

For tasks, about a month.

Verdict · measured basis

Gemma 3 4B costs $0.0000 per solved task against gpt-oss-20b at $0.0003 — ▼ 5.6x cheaper. Over 200 tasks that is $0.04 a month.

On output token price alone Gemma 3 4B looks 1.3x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for gpt-oss-20b and Gemma 3 4B
Figuregpt-oss-20bGemma 3 4B
Input $/Mtok$0.03$0.05
Output $/Mtok$0.13$0.1
Cached input $/Mtok$0.03$0.05
Pass rate94%50%
Cost per solved task$0.0003measured$0.0000measured
Cost per month$0.05$0.01

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for Gemma 3 4B (measured, $0.0000 per solved task), gpt-oss-20b (measured, $0.0003 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.001$0.01$0.1$1$10TASKS / MONTH (log) →200 tasksGemma 3 4B · MEASURED · $0.0000 per solved task$0.01gpt-oss-20b · MEASURED · $0.0003 per solved task$0.05— Gemma 3 4B · MEASURED— gpt-oss-20b · 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