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Head to head

Llama 3.1 70B InstructvsLlama 3.1 8B Instruct

For tasks, about a month.

Verdict · measured basis

Llama 3.1 8B Instruct costs $0.0000 per solved task against Llama 3.1 70B Instruct at $0.0005 — ▼ 14x cheaper. Over 200 tasks that is $0.10 a month.

On output token price alone Llama 3.1 8B Instruct looks 5.0x cheaper. The ranking holds, but the margin changes.

Verified pricing, pass rate and cost per solved task for Llama 3.1 70B Instruct and Llama 3.1 8B Instruct
FigureLlama 3.1 70B InstructLlama 3.1 8B Instruct
Input $/Mtok$0.4$0.05
Output $/Mtok$0.4$0.08
Cached input $/Mtok$0.4$0.025
Pass rate50%42%
Cost per solved task$0.0005measured$0.0000measured
Cost per month$0.11$0.01

Cost per month against tasks per month · drag the marker

Monthly cost against tasks per monthLog-log lines for Llama 3.1 8B Instruct (measured, $0.0000 per solved task), Llama 3.1 70B Instruct (measured, $0.0005 per solved task) from 10 to 100,000 tasks a month. Marker at 200 tasks.101001k10k100k$0.001$0.01$0.1$1$10TASKS / MONTH (log) →200 tasksLlama 3.1 8B Instruct · MEASURED · $0.0000 per solved task$0.01Llama 3.1 70B Instruct · MEASURED · $0.0005 per solved task$0.11— Llama 3.1 8B Instruct · MEASURED— Llama 3.1 70B Instruct · 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