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PromptUnit
Cut your AI API bill without losing answer quality
PromptUnit checks your app's AI requests side by side and moves each type of request to a cheaper model only when it answers just as well. Connect with two settings, keep your own provider keys. Free until it saves you money, then 20% of what it saves.
I built PromptUnit after seeing how many AI requests go to the most expensive model by default, even when a cheaper one would give the same answer.
How it works: you point your app at PromptUnit (two settings: the API address and a PromptUnit key). No code? Paste one ready message to your AI builder and it makes the change. Your own OpenAI, Anthropic, Google, Groq, DeepSeek or OpenRouter key stays yours.
For each type of request, PromptUnit compares answers from cheaper models side by side. Only when they're just as good does it move that request type over. If quality drops, it moves back. On OpenRouter or with several keys, it picks across all your models.
You see every request on the dashboard: the model you asked for, the model that answered, the cost and the saving. It's free until it has saved you money, then we take 20% of the saving.
I'd love your feedback, especially from anyone running AI features in production.
About PromptUnit on Product Hunt
“Cut your AI API bill without losing answer quality”
PromptUnit was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #137 on the daily leaderboard. PromptUnit checks your app's AI requests side by side and moves each type of request to a cheaper model only when it answers just as well. Connect with two settings, keep your own provider keys. Free until it saves you money, then 20% of what it saves.
On the analytics side, PromptUnit competes within SaaS, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how PromptUnit performed against the three products that launched closest to it on the same day.
Who hunted PromptUnit?
PromptUnit was hunted by Igal Kalnitsky. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of PromptUnit including community comment highlights and product details, visit the product overview.
Igal Kalnitsky
Hi Product Hunt! I'm Igal, the founder.
I built PromptUnit after seeing how many AI requests go to the most expensive model by default, even when a cheaper one would give the same answer.
How it works: you point your app at PromptUnit (two settings: the API address and a PromptUnit key). No code? Paste one ready message to your AI builder and it makes the change. Your own OpenAI, Anthropic, Google, Groq, DeepSeek or OpenRouter key stays yours.
For each type of request, PromptUnit compares answers from cheaper models side by side. Only when they're just as good does it move that request type over. If quality drops, it moves back. On OpenRouter or with several keys, it picks across all your models.
You see every request on the dashboard: the model you asked for, the model that answered, the cost and the saving. It's free until it has saved you money, then we take 20% of the saving.
I'd love your feedback, especially from anyone running AI features in production.