Name: Claude Opus 5.5
Brand: Anthropic

PerplexityModel update· 8 days ago

xhigh preset uses Claude Opus 5.5

Perplexity's Agent API xhigh preset now uses Claude Opus 5.5 instead of GPT-5.6-sol. Prompts, reasoning effort, tools, token budgets, and step limits remain unchanged.

PerplexityModel update· 8 days ago

xhigh preset uses Claude Opus 5.5

Perplexity's Agent API xhigh preset now uses Claude Opus 5.5 instead of GPT-5.6-sol. Prompts, reasoning effort, tools, token budgets, and step limits remain unchanged.

GitHub· 14 days ago

Claude Opus 5.5 is now available in GitHub Copilot

Claude Opus 5.5, Anthropic’s newest Opus model, is now available in GitHub Copilot. You can use it for agentic coding, long-running agentic tasks, and knowledge work. In early testing, Opus 5.5 resolved tasks comparably to Claude Opus 5 while using significantly fewer steps and tokens. It also quickly recovered from errors in multistep tasks. Claude Opus 5.5 watermarks its text outputs. The watermark doesn’t change the meaning, quality, or readability of outputs, nor does it add any tokens or cost. To learn more visit Anthropics’s How Claude’s text watermark works . This model is billed at provider list pricing under usage-based billing. See Models and pricing for GitHub Copilot for details. Claude Opus 5.5 is available to Copilot Pro+, Max, Business, and Enterprise users. You can select the model in the model picker in: Visual Studio Code Visual Studio Copilot CLI GitHub Copilot coding agent GitHub Copilot app github.com GitHub Mobile on iOS and Android JetBrains IDEs Xcode Eclipse Rollout will be gradual. Check back soon if you don’t see it yet. …

Microsoft· 14 days ago

Claude Opus 5.5 comes to Microsoft Foundry for long-running coding and knowledge work

AI models are increasingly taking on work that extends far beyond a single prompt: building a feature across a codebase, investigating a complex issue, synthesizing hundreds of pages of information, or working through a multi-step business process. As that work gets longer, raw intelligence is only part of what matters. The model also needs to stay focused, make good decisions along the way, communicate what it is doing, and produce work that people can quickly review and use. Today, Claude Opus 5.5 is available in Microsoft Foundry, bringing Anthropic’s most capable Opus model to developers and enterprises building AI applications and agents. Claude Opus 5.5 is designed for everyday complex work. It advances Opus 5 across agentic coding, knowledge work, and long-running tasks while making it easier for people to understand what the model did, what it found, and what it needs next. Claude Opus 5.5 also does more with fewer tokens. Lower per-token prices and much cheaper cache reads stack on top of the efficiency gains. Built for work that takes time Writing a function is one thing. …

AnthropicCapability change· 1h ago

Expanding the Cyber Verification Program

Anthropic expanded its Cyber Verification Program (CVP) into three access tiers—Defense Access, Red Team Access, and Specialized Access—each with different verification requirements and security controls. The program provides qualifying security professionals access to advanced models including Claude Opus 5.5, Claude Sonnet 5.5, and Claude Mythos 5.1, with reduced blocking classifiers for cyber work. Existing Project Glasswing members will transition to the Specialized Access tier without needing reapproval for current models.

AnthropicModel update· 8 days ago

Introducing Claude Sonnet 5.5

Anthropic released Claude Sonnet 5.5, the second model in the Claude 5.5 family, as a faster and lower-cost complement to Claude Opus 5.5. It runs 30%+ faster than Sonnet 5 and costs up to 30% less per task, with the same per-token pricing but fewer tokens needed. Sonnet 5.5 scores 70.6% on Terminal-Bench 4.0, up from Sonnet 5's 10.3%, and is the first Sonnet model to launch with cyber safeguards and fallbacks.

AnthropicModel update· 12 days ago

Coding sessions are longer and use more context. Claude Opus 5.5 is built with that in mind.

Anthropic released Claude Opus 5.5, a model update optimized for long-running coding sessions with higher context usage. The model costs approximately 40% less to run than Opus 5 for typical token-billed workloads, with significant savings on cached token reads. Opus 5.5 generates output more than 30% faster than Opus 5 and can complete open-ended tasks in fewer turns.

Anthropic Story of the weekModel update· 14 days ago

Introducing Claude Opus 5.5

Anthropic released Claude Opus 5.5, a new model that performs at the level of Claude Fable 5.1 on most work while costing 40% less to run than Opus 5. The model achieves the best scores on Anthropic's automated behavioral audit and generates output more than 30% faster than Opus 5. Claude Sonnet 5.5 and Claude Haiku 5.5 will follow in the coming weeks.

AnthropicPricing change· 14 days ago

What a task costs on Opus 5.5

Anthropic announced pricing for Claude Opus 5.5, which costs less per token than Opus 5. Input and output tokens are 20% cheaper, and cache reads are 60% cheaper. The post explains how task costs vary based on the number of turns, cache hit rates, output token usage, and model selection.

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