How much does Claude Sonnet 5.5 cost?

Claude Sonnet 5.5 costs $2.00 per million input tokens and $10 per million output tokens on standard pricing. A workload of 20M input and 5M output tokens a month is about $90.

What is the context length of Claude Sonnet 5.5?

Claude Sonnet 5.5 accepts up to 1,000,000 tokens (1M) of input and can return up to 128,000 tokens in one response.

Does Claude Sonnet 5.5 support tool calling and structured outputs?

Yes, Claude Sonnet 5.5 supports function/tool calling and structured (JSON) outputs. Supported tools: Function calling, Structured outputs, JSON mode, Reasoning, Prompt caching.

What inputs and outputs does Claude Sonnet 5.5 support?

Claude Sonnet 5.5 accepts Text, Image, PDF as input and produces Text as output.

When was Claude Sonnet 5.5 released?

Claude Sonnet 5.5 was released by Anthropic in 2026-09-28.

Claude Sonnet 5.5

claude-sonnet-5.5

API Provider site

Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing... Built by Anthropic.

Prices updated recently

Input price

$2.00

per 1M tokens · Standard

Output price

$10

per 1M tokens · Standard

Input limit

tokens

Output limit

128K

tokens

Input formats

TextImageVideoAudioPDF

Output formats

TextImageVideoAudioPDF

Compare

Claude Sonnet 5.5 price history

2 price records since 10/8/2026

Claude Sonnet 5.5 cost calculator

Input20M tokens

Output5M tokens

$90/month

Standard pricing

Overview

What is Claude Sonnet 5.5?

Claude Sonnet 5.5 is a text & reasoning and vision model from Anthropic. Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing... Its 1M context window and $2.00 input price make it a candidate for quality-focused production applications.

Image understandingDocument analysisContent workflowsClassification

Rates

Claude Sonnet 5.5 pricing

Pricing is based on token usage. Provider-specific caching, batch, regional, and tool charges may affect the final cost.

Input · Standard

$2.00

Per 1M tokens

Cached input · Standard

$0.10

Per 1M tokens

Capabilities

Claude Sonnet 5.5 Tools

Tools available when using Claude Sonnet 5.5 through supported provider APIs.

Function calling

Supported

Structured outputs

Supported

JSON mode

Supported

Reasoning

Supported

Built-in web search

Not supported

Log probabilities

Not supported

Deterministic seed

Not supported

Parallel tool calls

Not supported

Prompt caching

Supported

Strengths and limitations

Strengths

Priced at $2.00 input and $10 output per million tokens.
1M context supports large documents, repositories and extended conversations.
Supports text & reasoning and vision workloads in one model.

Limitations

Generated tokens cost 5× more than input tokens, which matters for verbose responses.
Large context capacity does not guarantee consistent retrieval across the entire prompt.
Arena Elo and MMLU-Pro are directional; test accuracy, latency and reliability on your own workload before committing.

Arena Elo, MMLU-Pro and pricing figures are illustrative; validate current vendor terms before purchase.

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