Guides
Models & Pricing
PromptDiff charges LLM API cost + 40% margin. Free tier: 100 evals/month with mini models (no card required).
| Model | Provider | Input/1M | Output/1M |
|---|---|---|---|
| claude-sonnet-4-6 | Anthropic | $3.00 | $15.00 |
| claude-haiku-4-5 | Anthropic | $0.80 | $4.00 |
| gpt-4o | OpenAI | $5.00 | $15.00 |
| gpt-4o-mini | OpenAI | $0.15 | $0.60 |
| gemini-2.5-pro | $1.25 | $10.00 | |
| gemini-2.5-flash | $0.15 | $0.60 | |
| grok-3 | Grok | $3.00 | $15.00 |
| grok-3-mini | Grok | $0.30 | $0.50 |
Pricing note
Prices above reflect underlying LLM provider costs and may change. Always use GET /v1/models for current pricing. PromptDiff charges LLM API cost + 40% margin. Free tier includes 100 evals/month with mini models — no credit card required.