Claude Sonnet 5.5

SyncDev model directory · Profile updated Oct 13, 2026

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Claude Sonnet 5.5 is an Anthropic language model that accepts text and images and returns text.

Key specifications

Specification score
75.6
Context window
1M
Max output
128K
Input / 1M tokens
$2.00
Output / 1M tokens
$10.00
License
Provider terms

The specification score summarizes recorded features and limits. It is not a benchmark result.

Inputs and outputs

Recorded modality support shows what this model can accept and produce. An undocumented modality is shown as unknown rather than assumed to be unsupported.

Accepts

  • Text input
  • Image input

Produces

  • Text output

Capabilities

ReasoningFunction callingVisionStreamingJSON mode

What is Claude Sonnet 5.5?

Claude Sonnet 5.5 is an Anthropic language model that accepts text and images and returns text.

Suitable workloads

Sonnet is a candidate for everyday coding and clearly scoped professional tasks. A good test is a collection of ordinary issues and document jobs your team already understands. Measure accepted results per unit of time and cost, including the corrections needed after the first response.

Integration details

Use claude-sonnet-5-5 on the Claude API. The model supports adaptive thinking. Check the Sonnet-specific migration guide before carrying forward thinking controls and conversation state from an older Claude model.

Context, output and cost

The standard documented limits are a one-million-token context window and 128,000 output tokens. Base Claude API rates are $2 input and $10 output per million tokens. Cache reads, cache writes, batch processing and a third-party host have separate pricing considerations.

How to compare it

Keep the effort setting, tool definitions and input material consistent. For document work, verify that the answer preserves important facts and identifies missing evidence. For coding, inspect the diff and run the test suite; do not turn a confident narrative into a passing score.

Explore the Anthropic catalog, or use the comparison tool to inspect a second candidate's interface and recorded prices. Specifications and access were checked against publisher documentation on the publisher’s announced release.

How to evaluate Claude Sonnet 5.5

Compare the model on the work you need to complete.

Tasks and inputs

Claude Sonnet 5.5 is listed for Image-text-to-text, Text generation. It accepts text, image and produces text. Use the publisher’s input format and preprocessing for your chosen deployment.

Capacity and cost

Documented limits: 1M context and 128K maximum output. The listed route charges $2.00 input and $10.00 output per million tokens. Measure a completed task using the prompts, documents and tools your application will use. Include reasoning and retries in the result.

Choosing a deployment

Use the model identifier and account requirements for the selected API route. Confirm its request limits and output format with one complete task before connecting a larger workflow.

Frequently asked questions

Check the publisher documentation, exact model or checkpoint ID, runtime compatibility and current access terms. Test representative inputs and record failures, latency and total cost before changing a production route.

These records share a directory category. Check the source card, output type and deployment requirements before treating a model as a replacement.

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