Head to head
vs For light moderate heavy
Verdict · measured basis
Claude Opus 5 costs $0.10 per solved task against
DeepSeek V4 Pro at $0.21 — ▼ 2.1x cheaper .
Over 200 tasks that is $22 a month.
On output token price alone DeepSeek V4 Pro looks 6.3x cheaper. The ranking reverses once you divide by pass rate — the cheaper tokens do not win the task.
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Verified pricing, pass rate and cost per solved task for Claude Opus 5 and DeepSeek V4 Pro Figure Claude Opus 5 DeepSeek V4 Pro Input $/Mtok $5 $1.32 Output $/Mtok $25 $3.96 Cached input $/Mtok $0.5 $0.044 Pass rate 100% 43% Cost per solved task $0.10 measured $0.21 measured Cost per month $19 $42
Cost per month against tasks per month · drag the marker
Monthly cost against tasks per month Log-log lines for Claude Opus 5 (measured, $0.10 per solved task), DeepSeek V4 Pro (measured, $0.21 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks. 10 100 1k 10k 100k $1 $10 $100 $1k $10k TASKS / MONTH (log) → 200 tasks Claude Opus 5 · MEASURED · $0.10 per solved task $19 Claude Opus 5 MEASURED DeepSeek V4 Pro · MEASURED · $0.21 per solved task $42 DeepSeek V4 Pro MEASURED Monthly cost against tasks per month Log-log lines for Claude Opus 5 (measured, $0.10 per solved task), DeepSeek V4 Pro (measured, $0.21 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks. 10 100 1k 10k 100k $1 $10 $100 $1k $10k TASKS / MONTH (log) → 200 tasks Claude Opus 5 · MEASURED · $0.10 per solved task $19 DeepSeek V4 Pro · MEASURED · $0.21 per solved task $42 — Claude Opus 5 · MEASURED — DeepSeek V4 Pro · MEASURED Solid measured · dashed modeled · dotted stale. The gap is the verdict.
Solvency Bench (solvency.dev) — first-party measurement · verified 2026-08-21 · prices from each provider's pricing page; measured rows ignore the tier · Methodology · All models at these settings