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Head to head

Qwen3.5-9BvsQwen3 VL 8B Instruct

For tasks, about a month.

Verdict · measured basis

Qwen3 VL 8B Instruct costs $0.0001 per solved task against Qwen3.5-9B at $0.0038 — ▼ 31x cheaper. Over 200 tasks that is $0.74 a month.

On output token price alone Qwen3.5-9B looks 3.0x 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 Qwen3.5-9B and Qwen3 VL 8B Instruct
FigureQwen3.5-9BQwen3 VL 8B Instruct
Input $/Mtok$0.1$0.117
Output $/Mtok$0.15$0.455
Cached input $/Mtok$0.1$0.117
Pass rate28%61%
Cost per solved task$0.0038measured$0.0001measured
Cost per month$0.77$0.02

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for Qwen3 VL 8B Instruct (measured, $0.0001 per solved task), Qwen3.5-9B (measured, $0.0038 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.001$0.01$0.1$1$10$100TASKS / MONTH (log) →200 tasksQwen3 VL 8B Instruct · MEASURED · $0.0001 per solved task$0.02Qwen3.5-9B · MEASURED · $0.0038 per solved task$0.77— Qwen3 VL 8B Instruct · MEASURED— Qwen3.5-9B · 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