What an evaluation run will cost

Open formula. Browser-based calculations. Source-dated rates. No API keys. No provider login. No tracing SDK. No account required. Input payloads are not stored.
Pricing source date: 2026-05-28 · Build verification: 2026-05-28 · Stale threshold: 30 days. Estimates use published per-token API pricing for the model/provider path shown by the calculator, reviewed on the source date shown. Provider rates change frequently; verify current pricing on the provider's own page before committing to traffic volume, eval cadence, or agent-loop workload shape.
Diagnostic output: Each calculation returns Cost classification, Dominant cost driver, Decision threshold, and Sensitivity. Focus for this tool: Eval-suite run cost and monthly recurring-eval budget threshold.

About this calculator

Enter samples, candidate models, trials per sample, token sizes, and an optional LLM-as-judge pass; Model Ruler returns total and per-run cost. Samples times models times trials multiplies cost linearly, so treat recurring CI/eval usage as a monthly line item, not a one-off.

Methodology summary

Budgets repeated model-evaluation runs across samples, candidate models, trials, and optional judge passes.

Formula: total_cost = primary_eval_calls * primary_model_cost + judge_eval_calls * judge_model_cost

Audit coverage: Eval-suite budget

Open the full methodology for this calculator.

Frequently asked

What does this calculator compute?
It multiplies samples, candidate models, and trials by per-call token cost — plus an optional judge pass — to budget an evaluation run.

What should I check before committing to a workload shape?
Eval cost scales with the number of test cases, how often the suite runs, and whether you use a judge model. A large judge model run on every commit is usually the dominant line; check whether a smaller judge or a reduced eval cadence holds quality before scaling frequency.

Is this a quote or a benchmark?
Neither. It is a computed estimate. Real-world cost varies by rate-limit shape, caching, token-count precision, and provider-specific discounts not reflected in the public pricing table.

Related tools

Estimates use published per-token API pricing for the model/provider path shown by the calculator, reviewed on the source date shown. Provider rates change frequently; verify current pricing on the provider's own page before committing to traffic volume, eval cadence, or agent-loop workload shape. View methodology.