OpenAI vs Anthropic cost comparison
Choosing between GPT and Claude often comes down to cost at your volume. This tool puts equivalent models side by side — GPT-4o against Claude Sonnet, GPT-4o mini against Claude Haiku — and prices your exact token profile so you can see which provider is cheaper and by how much.
How it works
You enter the prompt and completion tokens for a typical request and pick
a tier that maps an OpenAI model to its closest Anthropic counterpart. The
calculator prices each side as (prompt ÷ 1M × input price) + (completion ÷ 1M × output price), multiplies by your daily volume, and projects a monthly
figure for both.
The result shows per-request and monthly cost for each provider, the winner, and the percentage difference. Because the same token profile is applied to both, the comparison isolates pricing from usage assumptions.
Tips and notes
- Equivalence is approximate. Tier pairings reflect rough capability, not identical behaviour — always test quality on your real task before switching.
- Output-heavy workloads shift the winner. Because output is the expensive side, a model that is cheaper on input can still cost more if you generate long responses. Try realistic completion lengths.
- Prices are editable estimates. Both providers change rates; confirm current pricing in each dashboard before committing budget.