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
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.
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.