Anthropic

Anthropic: Claude Sonnet 5.5

anthropic/claude-sonnet-5.5
Context

1M

Input

text, image, file

Output

text

Tool calling

Supported

About this model

Claude Sonnet 5.5 is Anthropic's fast, highly capable hybrid reasoning model designed for coding, agentic workflows, computer use, knowledge work, and everyday professional tasks. It improves substantially over Sonnet 5 while generating outputs more than 30% faster and using fewer tokens to complete comparable work. The model supports configurable reasoning effort, long-running tool-driven workflows, image understanding, computer interaction, and complex multi-step execution. It is particularly suited to software engineering, iterative development, enterprise automation, document and spreadsheet creation, research, and high-volume agentic applications where a balance of capability, speed, and cost is important.

Input modalities

text

Accepted as model input

image

Accepted as model input

file

Accepted as model input

Providers

Available routing options for this model through OneInfer.

Available

Input tokens

$2.000 / 1M tokens

Output tokens

$10.000 / 1M tokens

Routing

OneInfer optimized

Pricing

Current OneInfer pricing for this model.

UsagePrice
Input tokens$2.000 / 1M tokens
Output tokens$10.000 / 1M tokens
Cached input tokens$0.100 / 1M tokens

Performance & Benchmarks

Independent evaluations and live cluster operational metrics

We haven’t measured this model yet. Published academic results are under Academic Evaluations.

API Guide

API docs
  1. 1

    Generate your access token

    Use your API key to generate the JWT access token required by the Models API.

  2. 2

    Add the JWT token

    Copy the generated JWT token and replace JWT_TOKEN in the example below.

  3. 3

    Check your credits

    If your balance is too low, before calling the model.

  4. 4

    Run the API example

    Choose your preferred language, copy the example, and send your first model request.

    curl https://api.oneinfer.ai/v1/ula/chat/completions \
      -H "Authorization: Bearer $JWT_TOKEN" \
      -H "Content-Type: application/json" \
      -d '{
        "model": "anthropic/claude-sonnet-5.5",
        "messages": [
          { "role": "user", "content": "Hello!" }
        ]
      }'

Community Model Reviews & Ratings

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4.8
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