AI API cost calculator

Enter your monthly tokens and compare approximate API costs across the three big providers.

Monthly input tokens Monthly output tokens

Tip: roughly 1,000 tokens ≈ 750 words. Output tokens usually cost more than input tokens, so long answers drive the bill.

Provider (representative model)	Input / 1M*	Output / 1M*	Est. monthly cost
OpenAI (GPT-5.6 Sol)	$4.00	$20.00	—
Claude (Sonnet 5.5)	$2.00	$10.00	—
Google Gemini (3.6 Flash)	$0.75	$3.75	—

⚠️ Prices are APPROXIMATE, as of 2026-10-26. Providers change rates, run promotions and charge differently for caching, batch use and long context. This is an estimate for one representative model per provider — not a quote. Always check the official pricing page before you buy or build: OpenAI pricing, and the official Anthropic and Google pricing pages. API usage is billed separately from chat subscriptions.

Also try: Model Picker · Free Credits Finder · AI Cost Calculator