How much does it cost to use a top AI model?
API models are priced per million tokens, with output costing more than input. On list prices recorded 24 October 2026, Claude Opus 5.5 is $4 in and $20 out, GPT-6 Astra $10 and $50, and Gemini 3.8 Flash $0.75 and $3.75. Check the vendor's page before budgeting.
The full answer
Through an API, models are priced per million tokens, with output tokens costing more than input tokens. On the list prices this site recorded on 24 October 2026, Claude Opus 5.5 is $4 for input and $20 for output per million tokens, GPT-6 Astra is $10 and $50, and Gemini 3.8 Flash is $0.75 and $3.75.
List prices change, and your real bill depends on how many tokens you send and receive, so check the vendor's pricing page before you budget. The cost calculator turns your own request volume into a monthly estimate for 15 models.
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