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AnthropicPixMind route verified · 2026-11-01

Chat with Claude Sonnet 5.5

Claude Sonnet 5.5 is a fit for production coding, structured writing, and synthesizing long sets of documents. Its input and output token rates are half those of Opus 5.5 on PixMind. Use its 1M-input-token route for larger source sets, with image input, tools, streaming, and up to 128K output tokens.

everyday coding, structured writing, and long-document synthesis

Context window
1,000,000
Maximum output
128,000
Streaming
Supported
Claude Sonnet 5.5

Selected model

Claude Sonnet 5.5

Claude Sonnet 5.5

What this model is built to do

Claude Sonnet 5.5 is a fit for production coding, structured writing, and synthesizing long sets of documents. Its input and output token rates are half those of Opus 5.5 on PixMind. Use its 1M-input-token route for larger source sets, with image input, tools, streaming, and up to 128K output tokens.

What Claude Sonnet 5.5 can handle

  • Text
  • Vision
  • Reasoning
  • Tool calling
  • Coding
  • Streaming

Three jobs to try first

When to choose Claude Sonnet 5.5

1

Repository-scale code review

Trace behavior across files, identify failure paths, and propose a scoped patch plan.

Prompt starter

Review the attached code for [goal]. Trace the request end to end, list findings by severity with file evidence, then propose the smallest safe patch and focused tests.

2

Structured professional draft

Create a usable brief, proposal, specification, or report with explicit sections and criteria.

Prompt starter

Draft a [deliverable] for [audience]. Use this source material: [context]. Required sections: [sections]. Keep claims evidence-based and end with decisions and next actions.

3

Long-document synthesis

Extract decisions, disagreements, evidence, and action items from a large source set.

Prompt starter

Analyze these documents as one evidence set. Separate confirmed facts, open questions, and contradictions. Produce an executive summary plus a source-linked action table.

Current PixMind route

This PixMind route accepts text and images. Video, audio, or PDF availability is shown separately and should not be inferred from the model family.

Model ID
claude-sonnet-5-5
Endpoint
/v1/chat/completions
PixMind inputs
Text · Vision

Adaptive thinking; effort low to max

Current token pricing

Studio and API share the same rates: $1.60 per 1M input tokens and $8 per 1M output tokens, at 80% of the official reference. Cache reads and writes are priced separately below.

Per 1M tokens
Input1568~$1.6
Output7840~$8
Cache read156.8~$0.16
Cache write (5m)1960~$2
Cache write (1h)3136~$3.2

Credits and approximate USD per 1M tokens

Choose this model or switch?

Compare the current route with nearby models before spending tokens on a long conversation.

ModelBest forPixMind inputsMax outputInput points / 1M
Claude Sonnet 5.5Current pageeveryday coding, structured writing, and long-document synthesisText · Vision128,0001,568
Claude Opus 5.5architecture decisions, repository review, and multi-step technical reasoningText · Vision16,0003,136
Claude Haiku 5.5batch extraction, classification, summaries, and bilingual supportText · Vision128,00078.4
GPT-6.1 Terraeveryday writing, structured extraction, and bilingual summariesText12,800784

From first question to useful answer

  1. 1Write the task, desired output, and relevant context in the prompt box.
  2. 2Continue in AI Chat with follow-up questions; the selected model stays active.
  3. 3Start a new chat when you want a clean context or switch models at any time.

Facts and sources

Model-family claims come from provider documentation. Inputs, limits, and points follow the PixMind route verification date shown above.

Frequently asked questions

How do I use Claude Sonnet 5.5 for “Repository-scale code review”?

Trace behavior across files, identify failure paths, and propose a scoped patch plan. Start with this template: Review the attached code for [goal]. Trace the request end to end, list findings by severity with file evidence, then propose the smallest safe patch and focused tests.

How do I use Claude Sonnet 5.5 for “Structured professional draft”?

Create a usable brief, proposal, specification, or report with explicit sections and criteria. Start with this template: Draft a [deliverable] for [audience]. Use this source material: [context]. Required sections: [sections]. Keep claims evidence-based and end with decisions and next actions.

How do I use Claude Sonnet 5.5 for “Long-document synthesis”?

Extract decisions, disagreements, evidence, and action items from a large source set. Start with this template: Analyze these documents as one evidence set. Separate confirmed facts, open questions, and contradictions. Produce an executive summary plus a source-linked action table.

What inputs does Claude Sonnet 5.5 currently support in PixMind?

This PixMind route accepts text and images. Video, audio, or PDF availability is shown separately and should not be inferred from the model family. The current catalog flags: text, vision.

How should I prompt Claude Sonnet 5.5?

State the outcome and constraints directly. For long work, define checkpoints and the expected deliverable instead of repeatedly asking the model to be thorough.

How is Claude Sonnet 5.5 usage priced?

Studio and API share the same rates: $1.60 per 1M input tokens and $8 per 1M output tokens, at 80% of the official reference. Cache reads and writes are priced separately below.

When should I choose another model over Claude Sonnet 5.5?

Claude Sonnet 5.5 is positioned for everyday coding, structured writing, and long-document synthesis. Check the comparison table when lower cost, different input support, or a heavier reasoning tier matters more.

What should I do if a Claude Sonnet 5.5 response stops?

A network interruption, insufficient balance, or temporary model availability can stop a reply. Before resending, check whether token usage and points were already settled.

Start a conversation · Claude Sonnet 5.5

Use the prompt box above to send a focused first task, then continue in the full AI Chat workspace.

Start chatting