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Anthropic

Claude Sonnet 5.5

A Claude model for everyday coding, writing and visual analysis, with room for large reference documents.

Open provider docsSee key factsPricing & comparisons

Plain-English overview

What Claude Sonnet 5.5 actually is

Sonnet 5.5 is designed for clearly defined tasks: fixing a bug, drafting a report or refining a presentation. It reads text and images and returns text, while connected tools let an application take actions.

It keeps Sonnet 5's token prices, with standard rates across the full million-token context window. Anthropic reports faster output and lower task costs, but those are provider claims, not Cody measurements. Actual cost depends on how many tokens your task uses.

Good fit for

  • Everyday coding and bug fixes
  • Reports and presentation drafts
  • Reviewing text and images

Category comparison

The facts that matter for text models

These are provider-published specifications, not Cody benchmark scores. Follow the linked sources for current limits and endpoint-specific exceptions.

Context window
1M tokensMaximum combined prompt and working context documented by the provider.
Maximum output
128K tokensProvider-published response limit, where available.
Knowledge cutoff
June 2026Latest reliable knowledge date explicitly published by the model provider. Search and connected tools can retrieve newer information but do not change the model's built-in cutoff.
Input price
$2 / 1MCurrent standard list price per million input tokens unless noted.
Output price
$10 / 1MCurrent standard list price per million output tokens unless noted.
Inputs
Text, imageMedia types accepted by the listed model endpoint.
Tools & agents
Tool use, agents, vision, coding workflowsSelected native tools and agent-building capabilities, not an exhaustive list.

Pricing & comparisons

Estimate your cost

Set your usage. Your estimate updates as you type.

Example: 6,000 input tokens for 10 pages, plus a 500-token summary. Page lengths vary; adjust the numbers below.

One run sends your input to the model once and receives an answer. Tokens are pieces of text: input is what you send, output is the answer you receive.

Advanced options

Claude Sonnet 5.5

Anthropic

Estimated total (USD)

$0.017

For the usage above · USD · API pricing, not a subscription

Input tokens
$2.00 per 1M tokens
Output tokens
$10.00 per 1M tokens
How this estimate works

Estimates exclude taxes, tools, cache storage/writes, free allowances and custom discounts. Image estimates cover output only, not prompt or reference-image charges. Quality modes differ by model. Unlisted settings are not treated as free.

API and provider access

Where to get Claude Sonnet 5.5

AnthropicClaude model and API docsDirect Claude API access.AWS, Google Cloud, MicrosoftCloud availabilityMarketplace and regional access varies by cloud.

Availability

Regions and access stage

Available through Claude API, Amazon Bedrock, Google Cloud and Microsoft Foundry.

Direct access depends on Anthropic's supported-country list; cloud regions and marketplace eligibility vary.

Check live availability

Data and training

The route matters.

Anthropic does not train on API data without express permission. Retention depends on the API feature, account agreement and cloud provider.

This is a concise reading of the cited provider material, not legal advice. A third-party gateway can have different storage, routing, training, and residency terms from the model maker's direct API.

Read the provider policy

Frequently asked questions

Claude Sonnet 5.5 FAQ

What is Claude Sonnet 5.5?

A Claude model for everyday coding, writing and visual analysis, with room for large reference documents. Sonnet 5.5 is designed for clearly defined tasks: fixing a bug, drafting a report or refining a presentation. It reads text and images and returns text, while connected tools let an application take actions.

When was Claude Sonnet 5.5 released?

Claude Sonnet 5.5 was released on September 28, 2026 according to the cited provider materials.

Where can I access Claude Sonnet 5.5?

Available through Claude API, Amazon Bedrock, Google Cloud and Microsoft Foundry. The access routes listed in this guide are Anthropic and AWS, Google Cloud, Microsoft.

How much does Claude Sonnet 5.5 cost?

$2 input · $10 output / 1M tokens. Standard Claude API rates. Cache writes, tools and regional premiums can add to the bill.

Where is Claude Sonnet 5.5 available?

Available through Claude API, Amazon Bedrock, Google Cloud and Microsoft Foundry. Direct access depends on Anthropic's supported-country list; cloud regions and marketplace eligibility vary.

Is my Claude Sonnet 5.5 API data used for training?

Anthropic does not train on API data without express permission. Retention depends on the API feature, account agreement and cloud provider. The policy belongs to the provider route and account terms, so verify it again before production use.

Price comparison

One price per model, using the same input/output mix. We weight each API rate by its share of one million total tokens and use the lowest matching reviewed route. This is a comparison rate, not a cost per task or a quality score. Tokenizers, caching, reasoning and long context can change your actual bill.

Blended token costper 1M total tokens · USD

75% input + 25% output · no cache discounts

  1. $0.20
    GPT-6 Luna

    OpenAI

  2. $0.2625
    Mistral Small 4

    Mistral AI

  3. $0.45
    GPT-5.6 Luna

    OpenAI

  4. $1.50
    Gemini 3.8 Flash

    Google

  5. $2.00
    Claude Haiku 4.5

    Anthropic

  6. $4.00
    GPT-6.1 Sol

    OpenAI

  7. $4.00
    Claude Sonnet 5.5

    Anthropic

    This model

  8. $4.00
    GPT-6 Sol

    OpenAI

  9. $4.00
    Claude Sonnet 5

    Anthropic

  10. $4.50
    GPT-5.6 Terra

    OpenAI

  11. $8.00
    Daybreak Blue

    OpenAI

  12. $8.00
    Claude Opus 5.5

    Anthropic

  13. $8.00
    GPT-5.6 Sol

    OpenAI

  14. $10.00
    Claude Opus 5

    Anthropic

  15. $20.00
    Claude Fable 5

    Anthropic

  16. $20.00
    GPT-6 Astra

    OpenAI

  17. $20.00
    Claude Fable 5.1

    Anthropic

Related comparisons

Head-to-head comparisons

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  1. Claude Sonnet 5.5 vs GPT-6.1 Sol

    An OpenAI reasoning model for complex coding, research and tool-assisted work at a lower token price than Astra.

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  2. Claude Sonnet 5.5 vs GPT-6 Sol

    An OpenAI model for coding projects and assistants that carry out several steps with tools.

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  3. Claude Sonnet 5.5 vs Claude Opus 5.5

    A Claude model for large code changes, detailed research and business tasks that take many steps.

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  4. Claude Sonnet 5.5 vs Claude Sonnet 5

    A lower-priced Claude option for everyday coding, writing and tool-assisted work.

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