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SOLVENCY

Head to head

Claude Opus 5 vs GPT-5.6 Sol

For tasks, about a month.

Verdict · measured basis

GPT-5.6 Sol costs $9.88 per solved task against Claude Opus 5 at $12.01 — ▼ 1.2x cheaper. Over 200 tasks that is $428 a month.

On output token price alone Claude Opus 5 looks 1.2x cheaper. The ranking reverses once you divide by pass rate — the cheaper tokens do not win the task.

Verified pricing, pass rate and cost per solved task for Claude Opus 5 and GPT-5.6 Sol
FigureClaude Opus 5GPT-5.6 Sol
Input $/Mtok$5$5
Output $/Mtok$25$30
Cached input $/Mtok$0.5$0.5
Pass rate68%65%
Cost per solved task$12.01measured$9.88measured
Cost per month$2.4k$2.0k

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for GPT-5.6 Sol (measured, $9.88 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$100$1k$10k$100k$1MTASKS / MONTH (log) →200 tasksGPT-5.6 Sol · MEASURED · $9.88 per solved task$2.0kClaude Opus 5 · MEASURED · $12.01 per solved task$2.4k— GPT-5.6 Sol · 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