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Head to head

GPT-5.6 SolvsClaude Fable 5

For tasks, about a month.

Verdict · measured basis

GPT-5.6 Sol costs $0.0095 per solved task against Claude Fable 5 at $17.45 — ▼ 1844x cheaper. Over 200 tasks that is $3.5k a month.

On output token price alone GPT-5.6 Sol looks 1.7x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for GPT-5.6 Sol and Claude Fable 5
FigureGPT-5.6 SolClaude Fable 5
Input $/Mtok$5$10
Output $/Mtok$30$50
Cached input $/Mtok$0.5$1
Pass rate100%67%
Cost per solved task$0.0095measured$17.45measured
Cost per month$2$3.5k

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for GPT-5.6 Sol (measured, $0.0095 per solved task), Claude Fable 5 (measured, $17.45 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.1$1$10$100$1k$10k$100k$1MTASKS / MONTH (log) →200 tasksGPT-5.6 Sol · MEASURED · $0.0095 per solved task$2Claude Fable 5 · MEASURED · $17.45 per solved task$3.5k— GPT-5.6 Sol · MEASURED— Claude Fable 5 · 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