🔀 Prompt Diff
Compare two prompts side-by-side — token delta, cost difference, and text changes at a glance.
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Works offline
19 models
No API key
Char-level diff
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Select model for token counting & cost estimation
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Cost delta (input)
per 1M calls
📝 Prompt A (before)
Tokens0
Characters0
Words0
Lines0
Est. input cost$0.000000
✏️ Prompt B (after)
Tokens0
Characters0
Words0
Lines0
Est. input cost$0.000000
🔍 Text diff
Paste prompts above to see the diff
💰 Cost comparison — current model