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SOLVENCY

Head to head

Claude Opus 4.6 vs Claude Opus 4.5

Claude Opus 4.6 is legacy; Claude Opus 4.5 is legacy.

For tasks, about a month.

Verdict · modelled basis

Claude Opus 4.6 costs $3.85 per solved task against Claude Opus 4.5 at $4.36 — ▼ 1.1x cheaper. Over 200 tasks that is $101 a month.

On output token price alone Claude Opus 4.6 looks 1.0x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for Claude Opus 4.6 and Claude Opus 4.5
FigureClaude Opus 4.6Claude Opus 4.5
Input $/Mtok$5$5
Output $/Mtok$25$25
Cached input $/Mtok$0.5$0.5
Pass rate52%46%
Cost per solved task$3.85modelled$4.36modelled
Cost per month$771$872

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for Claude Opus 4.6 (modelled, $3.85 per solved task), Claude Opus 4.5 (modelled, $4.36 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$100$1k$10k$100kTASKS / MONTH (log) →200 tasksClaude Opus 4.6 · MODELLED · $3.85 per solved task$771Claude Opus 4.5 · MODELLED · $4.36 per solved task$872— Claude Opus 4.6 · MODELLED— Claude Opus 4.5 · MODELLED

Solid measured · dashed modelled · dotted stale. The gap is the verdict.

Source: Scale SEAL leaderboard, SWE-bench Pro · verified 2026-08-21 · prices from each provider's pricing page; measured rows ignore the tier · Methodology · All models at these settings