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Head to head

GPT-5.6 TerravsGPT-5 Nano

For tasks, about a month.

Verdict · measured basis

GPT-5 Nano costs $0.0010 per solved task against GPT-5.6 Terra at $4.50 — ▼ 4286x cheaper. Over 200 tasks that is $900 a month.

On output token price alone GPT-5 Nano looks 30x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for GPT-5.6 Terra and GPT-5 Nano
FigureGPT-5.6 TerraGPT-5 Nano
Input $/Mtok$2$0.05
Output $/Mtok$12$0.4
Cached input $/Mtok$0.2$0.005
Pass rate60%100%
Cost per solved task$4.50measured$0.0010measured
Cost per month$900$0.21

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for GPT-5 Nano (measured, $0.0010 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-5 Nano · MEASURED · $0.0010 per solved task$0.21GPT-5.6 Terra · MEASURED · $4.50 per solved task$900— GPT-5 Nano · 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