Anthropic (Claude API)

The Claude API gives access to Anthropic's Claude models through the Messages API. Supports chat, vision, tool use, streaming, adaptive thinking, prompt caching and batch processing; SDKs for Python, TypeScript, Go, Java, C#, PHP and Ruby.

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Anthropic (Claude API) at a glance

From official pages, checked Sep 29, 2026. Tap the arrow for each source.

Free tier: Trial credits
New users receive a small amount of free credits to test the API.
Starting price: $2 per 1M input tokens
Claude Sonnet 5.5; $10 per 1M output tokens (Haiku 4.5 from $1 input).
Rate limit: 1,000 requests/min
Start tier, Claude Sonnet 5.5 (2M input tokens/min); new orgs may start lower.
Size limit: 1M token context
Claude Fable 5.1, Opus 5.5 and Sonnet 5.5 (Haiku 4.5: 200K).
Official SDKs: PythonJavaScript / TypeScript
Trains on your data: No
Inputs and outputs from the Anthropic API are not used for training by default.
EU hosting: No
Inference geo is only us or global; workspace (storage) geo is only us.
Compliance: SOC 2ISO 27001HIPAA

What you can build with Anthropic (Claude API)

Anthropic (Claude API)RecipeBuild

Stream Claude Sonnet 5.5 replies from a FastAPI endpoint

A FastAPI route that streams Claude text chunks to any client using the Anthropic Python SDK's messages.stream helper.

Free tier: Trial creditsFrom $2 per 1M input tokens

Chat

Anthropic (Claude API) at a glance

What you can build with Anthropic (Claude API)

Stream Claude Sonnet 5.5 replies from a FastAPI endpoint

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