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Claude Opus 5.5

Claude Opus 5.5

Anthropic's first model in the Claude 5.5 family — for work that needs deeper analysis and judgment, at 40% lower cost than Opus 5.

Claude Opus 5.5 is a major step up from Opus 5 on complex, long-horizon work, from codebase-wide migrations to financial analysis. It also scores best among Claude models on Anthropic's automated behavioral audit, its most comprehensive alignment test.

Claude Opus 5.5

Category

Multimodal Models

Last updated

What makes Claude Opus 5.5 different

Claude Opus 5.5 is built for work that needs deeper analysis and sustained judgment. Here is what stands out when you run it inside Doraverse.

A major step up on complex work

One early tester completed a 680,000-line code migration in under a day, work that would have taken an engineering team weeks.

40% cheaper to run

Opus 5.5 requires less compute than Opus 5, cutting typical workload costs by about 40% while generating output more than 30% faster.

Strongest alignment scores to date

On Anthropic's automated behavioral audit, Opus 5.5 is the strongest-performing Claude model tested so far, and more resistant to prompt injection.

Reliable, source-backed research

In Anthropic's own testing, Opus 5.5 was the only model to consistently clear a strict quality bar for figures and quotes drawn from hard-to-locate sources.

Claude Opus 5.5

vs Claude Sonnet 5.5

comparison

Claude Opus 5.5 is the stronger choice for deep analysis and judgment-heavy work. Claude Sonnet 5.5 still fits its own niche — see where each one wins.

Area

Claude Sonnet 5.5

Claude Opus 5.5

Best for

Claude Sonnet 5.5

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

Claude Opus 5.5

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

Speed and cost

Claude Sonnet 5.5

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

Claude Opus 5.5

Slower, priced for complex, high-value work

Doraverse access

Claude Sonnet 5.5

Available on Doraverse

Claude Opus 5.5

Available on Doraverse

Reasoning depth

Claude Sonnet 5.5

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

Claude Opus 5.5

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

Best fit

Claude Sonnet 5.5

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

Claude Opus 5.5

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

What you can do with Claude Opus 5.5

Start with the work where depth, consistency, and decision quality matter more than speed.

Codebase-wide migrations

Audit and update large codebases, including sprawling, multi-file changes.

Financial and business analysis

Build and check financial models, then turn them into a clear executive presentation.

Deep research

Produce reports with figures and quotes verified against hard-to-locate sources.

Long-horizon agent workflows

Run autonomous, multi-hour tasks across your connected tools with built-in safeguards.

Security-sensitive coding

Review code for vulnerabilities and operate within an auditable sandbox for high-trust agent work.

Model evaluation

Run your own prompts against Claude Opus 5.5 and compare depth and judgment with other models.

Start using Claude Opus 5.5 on Doraverse

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

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