PromptRail

Stop overpayingyour token

A routing plugin for Hermes and OpenClaw agents.

You put a budgetWe enforce it.

Rail-1 treats spend as a constraint, not a suggestion. Routine calls move to efficient models, premium routes stay available, and every request is checked against the remaining budget before it runs.

One request enters.The rightmodel answers.

Rail-1 evaluates each agent call before it reaches a provider, sends routine work through cheaper candidates, and keeps premium fallback available when the task needs it.

Same quality.Half the cost.

PromptRail reaches GPT-Sol high quality at the cost of GPT-Luna.

DeepSWE v1.1
GPT-5.6 SolGPT-5.6 LunaClaude Fable 5Gemini 3.1 Pro PreviewPromptRailGPT-5.6 TerraGPT-5.5Claude Opus 4.8$0$5$10$15$2010%20%30%40%50%60%70%API cost (USD)Score
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