---
title: "Anthropic API pricing for agents · DotsAgent"
description: "Anthropic models for building AI agents: input, cached and output prices per million tokens, context windows, documented agent features and recent API changes."
url: https://dotsagent.io/providers/anthropic
---

Provider

# Anthropic API models and prices

Claude models bill the full million-token window at one rate and discount cache reads heavily, which suits long agent loops. The newest models reject forced tool choice, so agents should send tool_choice auto with strict tool schemas.

| — | — | — | — | — | — |
| --- | --- | --- | --- | --- | --- |
| [Claude Fable 5.1](https://dotsagent.io/models/claude-fable-5-1)claude-fable-5-1 | $10 | $0.25 | $50 | 1M | 2026-09-01 |
| [Claude Opus 5.5](https://dotsagent.io/models/claude-opus-5-5)claude-opus-5-5 | $4 | $0.20 | $20 | 1M | 2026-09-22 |
| [Claude Sonnet 5.5](https://dotsagent.io/models/claude-sonnet-5-5)claude-sonnet-5-5 | $2 | $0.20 | $10 | 1M | 2026-09-28 |
| [Claude Haiku 4.5](https://dotsagent.io/models/claude-haiku-4-5)claude-haiku-4-5-20251001 | $1 | $0.10 | $5 | 200K | — |

US dollars per million tokens, standard tier, short-prompt rate · * long prompts cost more

[Official price page ↗](https://platform.claude.com/docs/en/about-claude/pricing)[Compare in the calculator](https://dotsagent.io/cost)

## Recent changes

- Sep 30, 2026Retirement[Claude Sonnet 4.5 deprecated](https://dotsagent.io/changelog#2026-09-30-claude-sonnet-4-5-deprecated)
- Sep 28, 2026Model[Claude Sonnet 5.5 launched](https://dotsagent.io/changelog#2026-09-28-claude-sonnet-5-5-launched)
- Sep 24, 2026Price[Billing resumes for some early refusals](https://dotsagent.io/changelog#2026-09-24-billing-resumes-for-some-early-refusals)
- Sep 22, 2026Model[Claude Opus 5.5 launched](https://dotsagent.io/changelog#2026-09-22-claude-opus-5-5-launched)
- Sep 22, 2026API[Inline tool definitions mid-conversation (beta)](https://dotsagent.io/changelog#2026-09-22-inline-tool-definitions-mid-conversation)
- Sep 14, 2026API[On-demand conversation compaction (beta)](https://dotsagent.io/changelog#2026-09-14-on-demand-conversation-compaction)

Independent reference for people who build AI agents. Not affiliated with any vendor named here.

© 2026 DotsAgent · Facts checked October 1, 2026