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Head to head

GPT-5.6 Terravsgpt-oss-20b

For tasks, about a month.

Verdict · measured basis

gpt-oss-20b costs $0.0003 per solved task against GPT-5.6 Terra at $4.50 — ▼ 16865x cheaper. Over 200 tasks that is $900 a month.

On output token price alone gpt-oss-20b looks 92x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for GPT-5.6 Terra and gpt-oss-20b
FigureGPT-5.6 Terragpt-oss-20b
Input $/Mtok$2$0.03
Output $/Mtok$12$0.13
Cached input $/Mtok$0.2$0.03
Pass rate60%94%
Cost per solved task$4.50measured$0.0003measured
Cost per month$900$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), GPT-5.6 Terra (measured, $4.50 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.01$0.1$1$10$100$1k$10k$100kTASKS / MONTH (log) →200 tasksgpt-oss-20b · MEASURED · $0.0003 per solved task$0.05GPT-5.6 Terra · MEASURED · $4.50 per solved task$900— gpt-oss-20b · MEASURED— GPT-5.6 Terra · 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