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Head to head

GPT-5.6 SolvsKimi K3

For tasks, about a month.

Verdict · measured basis

GPT-5.6 Sol costs $0.0095 per solved task against Kimi K3 at $0.16 — ▼ 17x cheaper. Over 200 tasks that is $31 a month.

On output token price alone Kimi K3 looks 2.0x 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 GPT-5.6 Sol and Kimi K3
FigureGPT-5.6 SolKimi K3
Input $/Mtok$5$3
Output $/Mtok$30$15
Cached input $/Mtok$0.5$0.3
Pass rate100%43%
Cost per solved task$0.0095measured$0.16measured
Cost per month$2$33

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), Kimi K3 (measured, $0.16 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.1$1$10$100$1k$10kTASKS / MONTH (log) →200 tasksGPT-5.6 Sol · MEASURED · $0.0095 per solved task$2Kimi K3 · MEASURED · $0.16 per solved task$33— GPT-5.6 Sol · MEASURED— Kimi K3 · 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