Head to head
BY vs ST For light moderate heavy
Verdict · measured basis
Seed-2.0-Mini costs $0.0014 per solved task against
Step 3.5 Flash at $0.0031 — ▼ 2.2x cheaper .
Over 200 tasks that is $0.34 a month.
On output token price alone Step 3.5 Flash looks 1.3x 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 Seed-2.0-Mini and Step 3.5 Flash Figure Seed-2.0-Mini Step 3.5 Flash Input $/Mtok $0.1 $0.1 Output $/Mtok $0.4 $0.3 Cached input $/Mtok $0.1 $0.1 Pass rate 94% 50% Cost per solved task $0.0014 measured $0.0031 measured Cost per month $0.28 $0.62
Cost per month against tasks per month · drag the marker
Monthly cost against tasks per month Log-log lines for Seed-2.0-Mini (measured, $0.0014 per solved task), Step 3.5 Flash (measured, $0.0031 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 TASKS / MONTH (log) → 200 tasks Seed-2.0-Mini · MEASURED · $0.0014 per solved task $0.28 Seed-2.0-Mini MEASURED Step 3.5 Flash · MEASURED · $0.0031 per solved task $0.62 Step 3.5 Flash MEASURED Monthly cost against tasks per month Log-log lines for Seed-2.0-Mini (measured, $0.0014 per solved task), Step 3.5 Flash (measured, $0.0031 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 TASKS / MONTH (log) → 200 tasks Seed-2.0-Mini · MEASURED · $0.0014 per solved task $0.28 Step 3.5 Flash · MEASURED · $0.0031 per solved task $0.62 — Seed-2.0-Mini · MEASURED — Step 3.5 Flash · 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