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SOLVENCY

Head to head

GPT-4.1 vs Claude Opus 4

GPT-4.1 is legacy; Claude Opus 4 is retired.

For tasks, about a month.

Verdict · stale basis

GPT-4.1 costs $1.37 per solved task against Claude Opus 4 at $8.33 — ▼ 6.1x cheaper. Over 200 tasks that is $1.4k a month.

On output token price alone GPT-4.1 looks 9.4x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for GPT-4.1 and Claude Opus 4
FigureGPT-4.1Claude Opus 4
Input $/Mtok$2$15
Output $/Mtok$8$75
Cached input $/Mtok$0.5$1.5
Pass rate52%72%
Cost per solved task$1.37stale$8.33stale
Cost per month$275$1.7k

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for GPT-4.1 (stale, $1.37 per solved task), Claude Opus 4 (stale, $8.33 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$10$100$1k$10k$100k$1MTASKS / MONTH (log) →200 tasksGPT-4.1 · STALE · $1.37 per solved task$275Claude Opus 4 · STALE · $8.33 per solved task$1.7k— GPT-4.1 · STALE— Claude Opus 4 · STALE

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

Source: Aider polyglot benchmark · verified 2026-08-21 · prices from each provider's pricing page; measured rows ignore the tier · Methodology · All models at these settings