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Claude Sonnet 5.5

Claude Sonnet 5.5

Anthropic's fastest Sonnet model to date — a clear upgrade over Sonnet 5 that runs 30%+ faster and costs up to 30% less for well-scoped everyday work.

Claude Sonnet 5.5 is the second model in Anthropic's Claude 5.5 family. It is strongest at well-scoped everyday tasks, fixing bugs, and creating polished documents, slides, and spreadsheets, with a sharp eye for design, and it complements Claude Opus 5.5 as the faster, lower-cost option for routine production work.

Claude Sonnet 5.5

Category

Multimodal Models

Last updated

What makes Claude Sonnet 5.5 different

Claude Sonnet 5.5 is built for fast, everyday work that still needs real reasoning. Here is what stands out when you run it inside Doraverse.

30% faster, up to 30% cheaper

Sonnet 5.5 needs far fewer tokens than Sonnet 5 to do the same work, so it answers faster and costs less per task.

A sharp eye for design

Early testers noted Sonnet 5.5 adds real polish to documents, slides, and interfaces, often requiring minimal editing.

Strong agentic coding

Sonnet 5.5 scores 70.6% on Terminal-Bench 4.0, a large jump from Sonnet 5's 10.3%, and comes close to Opus 5.5 on real coding sessions.

Clearer communication

Like Opus 5.5, Sonnet 5.5 writes more directly and is easier to follow over long working sessions.

Claude Sonnet 5.5

vs Claude Opus 5.5

comparison

Claude Sonnet 5.5 is the faster, lower-cost default for everyday work. Claude Opus 5.5 still fits its own niche — see where each one wins.

Area

Claude Opus 5.5

Claude Sonnet 5.5

Best for

Claude Opus 5.5

Deep analysis, complex reasoning, long workflows, and judgment-heavy tasks

Claude Sonnet 5.5

Well-scoped everyday tasks, bug fixes, and polished documents, slides, and spreadsheets

Speed and cost

Claude Opus 5.5

Slower, priced for complex, high-value work

Claude Sonnet 5.5

30%+ faster output, priced the same as Sonnet 5

Doraverse access

Claude Opus 5.5

Available on Doraverse

Claude Sonnet 5.5

Available on Doraverse

Reasoning depth

Claude Opus 5.5

Clearly stronger on complex, open-ended work needing sustained judgment

Claude Sonnet 5.5

Near-Opus scores on several benchmarks at Max effort, strong for well-defined tasks

Best fit

Claude Opus 5.5

High-stakes, long-horizon work where depth matters most

Claude Sonnet 5.5

Fast iteration, routine production work, and day-to-day coding

What you can do with Claude Sonnet 5.5

Start with the work where speed and polish matter as much as accuracy.

Documents and slides

Turn notes, data, or a template into a polished deck or report with minimal editing.

Coding and bug fixes

Plan a change, fix a bug, review a diff, and reason across several files quickly.

Content and copywriting

Draft and refine marketing copy, emails, and internal docs at speed.

Research synthesis

Turn long documents or transcripts into a clear, structured summary.

Business workflows

Handle structured, repeatable business tasks like reporting, ticket triage, or data cleanup.

Model evaluation

Run your own prompts side by side with other models before standardising a workflow on Sonnet 5.5.

Start using Claude Sonnet 5.5 on Doraverse

Run Claude Sonnet 5.5 next to every other model in one workspace, with your documents, tools, and agents already connected.

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