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Head to head

Laguna S 2.1vsQwen3.5-9B

For tasks, about a month.

Verdict · measured basis

Qwen3.5-9B costs $0.0038 per solved task against Laguna S 2.1 at $0.0044 — ▼ 1.2x cheaper. Over 200 tasks that is $0.12 a month.

On output token price alone Qwen3.5-9B looks 1.2x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for Laguna S 2.1 and Qwen3.5-9B
FigureLaguna S 2.1Qwen3.5-9B
Input $/Mtok$0.09$0.1
Output $/Mtok$0.18$0.15
Cached input $/Mtok$0.009$0.1
Pass rate23%28%
Cost per solved task$0.0044measured$0.0038measured
Cost per month$0.89$0.77

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for Qwen3.5-9B (measured, $0.0038 per solved task), Laguna S 2.1 (measured, $0.0044 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.1$1$10$100TASKS / MONTH (log) →200 tasksQwen3.5-9B · MEASURED · $0.0038 per solved task$0.77Laguna S 2.1 · MEASURED · $0.0044 per solved task$0.89— Qwen3.5-9B · MEASURED— Laguna S 2.1 · 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