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SOLVENCY

Head to head

GPT-5.6 Sol vs GPT-5.3 Codex

For tasks, about a month.

No verdict

Cost per solved task needs a published pass rate for both models. At least one has none, so it is reported as missing rather than estimated.

Verified pricing, pass rate and cost per solved task for GPT-5.6 Sol and GPT-5.3 Codex
FigureGPT-5.6 SolGPT-5.3 Codex
Input $/Mtok$5$1.75
Output $/Mtok$30$14
Cached input $/Mtok$0.5$0.175
Pass rate65%missing
Cost per solved task$9.88measuredmissing
Cost per month$2.0kmissing

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) 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$2.0k— GPT-5.6 Sol · 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