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Head to head

DeepSeek V4 ProvsGPT-5 Nano

For tasks, about a month.

Verdict · measured basis

GPT-5 Nano costs $0.0010 per solved task against DeepSeek V4 Pro at $0.21 — ▼ 199x cheaper. Over 200 tasks that is $42 a month.

On output token price alone GPT-5 Nano looks 9.9x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for DeepSeek V4 Pro and GPT-5 Nano
FigureDeepSeek V4 ProGPT-5 Nano
Input $/Mtok$1.32$0.05
Output $/Mtok$3.96$0.4
Cached input $/Mtok$0.044$0.005
Pass rate43%100%
Cost per solved task$0.21measured$0.0010measured
Cost per month$42$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), DeepSeek V4 Pro (measured, $0.21 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.01$0.1$1$10$100$1k$10kTASKS / MONTH (log) →200 tasksGPT-5 Nano · MEASURED · $0.0010 per solved task$0.21DeepSeek V4 Pro · MEASURED · $0.21 per solved task$42— GPT-5 Nano · MEASURED— DeepSeek V4 Pro · 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