Visual Diff for AI Prompt Templates
Compare prompt versions side-by-side with highlighted changes and performance impact. Know exactly which edits move the needle — and which ones don't.
Get Started — $15/moprompt.txtv2vsv1
+ You are a helpful assistant that responds concisely.
- You are an AI assistant.
Always answer in the user's language.
+ Keep responses under 3 sentences unless asked for detail.
Accuracy +12%Latency -8msCost +$0.002/req
Simple Pricing
$15/mo
Everything included, cancel anytime
- ✓Unlimited prompt versions
- ✓Side-by-side visual diffs
- ✓Performance metric tracking
- ✓Team collaboration
- ✓Export diff reports
FAQ
How does the diff work?
We use a line-level and token-level diff algorithm to highlight exactly what changed between any two prompt versions, with color-coded additions and deletions.
How are performance metrics tracked?
You log evaluation results via our API or dashboard. PromptDiff correlates metric changes (accuracy, latency, cost) with specific prompt edits so you can see what actually improved outcomes.
Can I use this with any LLM?
Yes. PromptDiff is model-agnostic — it works with OpenAI, Anthropic, Gemini, or any custom model. You bring the prompts and metrics; we handle the versioning and visualization.