Anthropic API pricing in 2026

Pay-as-you-go API access to Anthropic's Claude models for building AI applications. How Anthropic API charges, its plans and the alternatives.

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Billing

Pay as you use

Plans

How Anthropic API prices

Anthropic API is usage-based: you pay per transaction, message or unit used rather than a fixed subscription, so there's no plan price to show. Surba tracks what you actually pay each month.

Usage-based, per 1M tokens: Claude Opus 5.5 $4 in / $20 out; Sonnet 5.5 $2 / $10; Haiku 5.5 $0.10 / $0.50 (prompts ≤100K tokens). Prompt caching and batch discounts available; enterprise volume pricing via sales.

Checked on Anthropic API's site on 26 Oct 2026.

Alternatives

Alternatives to Anthropic API

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All 33 Anthropic API alternatives ranked by price

FAQ

Anthropic API pricing questions

How does Anthropic API charge?

Anthropic API is usage-based: you pay for what you use (transactions, messages, compute and so on) rather than a fixed subscription, so the bill depends on volume. Usage-based, per 1M tokens: Claude Opus 5.5 $4 in / $20 out; Sonnet 5.5 $2 / $10; Haiku 5.5 $0.10 / $0.50 (prompts ≤100K tokens). Prompt caching and batch discounts available; enterprise volume pricing via sales.

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