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SOLVENCY

Head to head

Claude Opus 5 vs DeepSeek V4 Flash

For tasks, about a month.

Verdict · measured basis

DeepSeek V4 Flash costs $0.12 per solved task against Claude Opus 5 at $12.01 — ▼ 100x cheaper. Over 200 tasks that is $2.4k a month.

On output token price alone DeepSeek V4 Flash looks 19x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for Claude Opus 5 and DeepSeek V4 Flash
FigureClaude Opus 5DeepSeek V4 Flash
Input $/Mtok$5$0.44
Output $/Mtok$25$1.32
Cached input $/Mtok$0.5$0.014
Pass rate68%50%
Cost per solved task$12.01measured$0.12measured
Cost per month$2.4k$24

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for DeepSeek V4 Flash (measured, $0.12 per solved task), Claude Opus 5 (measured, $12.01 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$1$10$100$1k$10k$100k$1MTASKS / MONTH (log) →200 tasksDeepSeek V4 Flash · MEASURED · $0.12 per solved task$24Claude Opus 5 · MEASURED · $12.01 per solved task$2.4k— DeepSeek V4 Flash · MEASURED— Claude Opus 5 · MEASURED

Solid measured · dashed modelled · 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