Head to head
vs UP For light moderate heavy
Verdict · measured basis
Solar Pro 4 costs $0.0003 per solved task against
GPT-5.6 Luna at $2.65 — ▼ 9328x cheaper .
Over 200 tasks that is $530 a month.
On output token price alone GPT-5.6 Luna looks 1.0x cheaper. The ranking reverses once you divide by pass rate — the cheaper tokens do not win the task.
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Verified pricing, pass rate and cost per solved task for GPT-5.6 Luna and Solar Pro 4 Figure GPT-5.6 Luna Solar Pro 4 Input $/Mtok $0.2 $0.3 Output $/Mtok $1.2 $1.2 Cached input $/Mtok $0.02 $0.06 Pass rate 57% 75% Cost per solved task $2.65 measured $0.0003 measured Cost per month $530 $0.06
Cost per month against tasks per month · drag the marker
Monthly cost against tasks per month Log-log lines for Solar Pro 4 (measured, $0.0003 per solved task), GPT-5.6 Luna (measured, $2.65 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks. 10 100 1k 10k 100k $0.01 $0.1 $1 $10 $100 $1k $10k $100k TASKS / MONTH (log) → 200 tasks Solar Pro 4 · MEASURED · $0.0003 per solved task $0.06 Solar Pro 4 MEASURED GPT-5.6 Luna · MEASURED · $2.65 per solved task $530 GPT-5.6 Luna MEASURED Monthly cost against tasks per month Log-log lines for Solar Pro 4 (measured, $0.0003 per solved task), GPT-5.6 Luna (measured, $2.65 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks. 10 100 1k 10k 100k $0.01 $0.1 $1 $10 $100 $1k $10k $100k TASKS / MONTH (log) → 200 tasks Solar Pro 4 · MEASURED · $0.0003 per solved task $0.06 GPT-5.6 Luna · MEASURED · $2.65 per solved task $530 — Solar Pro 4 · MEASURED — GPT-5.6 Luna · MEASURED Solid measured · dashed modeled · 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