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Head to head

Solar Pro 4vsQwen3 8B

For tasks, about a month.

Verdict · measured basis

Solar Pro 4 costs $0.0003 per solved task against Qwen3 8B at $0.0043 — ▼ 15x cheaper. Over 200 tasks that is $0.81 a month.

On output token price alone Qwen3 8B looks 2.6x 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 Solar Pro 4 and Qwen3 8B
FigureSolar Pro 4Qwen3 8B
Input $/Mtok$0.3$0.117
Output $/Mtok$1.2$0.455
Cached input $/Mtok$0.06$0.117
Pass rate75%57%
Cost per solved task$0.0003measured$0.0043measured
Cost per month$0.06$0.87

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for Solar Pro 4 (measured, $0.0003 per solved task), Qwen3 8B (measured, $0.0043 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.01$0.1$1$10$100TASKS / MONTH (log) →200 tasksSolar Pro 4 · MEASURED · $0.0003 per solved task$0.06Qwen3 8B · MEASURED · $0.0043 per solved task$0.87— Solar Pro 4 · MEASURED— Qwen3 8B · MEASURED

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

Solvency Bench (solvency.dev) — first-party measurement · verified 2026-08-26 · prices from each provider's pricing page; measured rows ignore the tier · Methodology · All models at these settings