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Meet Claude Opus 5.5: Frontier Intelligence at Peak Efficiency

Claude Opus 5.5 is the groundbreaking first release in Anthropic’s new Claude 5.5 family, redefining the frontier of AI capabilities. Designed for long-horizon agentic coding, complex knowledge work, and multidisciplinary reasoning, it handles massive, complex tasks with unprecedented autonomy and accuracy.

Built for unparalleled efficiency, Opus 5.5 delivers this top-tier performance while operating over 30% faster and costing 40% less than its predecessor, Opus 5. Claude Opus 5.5 is the ultimate AI partner for developers, researchers, and enterprises.

Claude Opus 5.5 Technical Specifications

Claude Opus 5.5: Core Capabilities & Advantages

Long-Horizon Agentic Coding

Engineered for long-running, multi-step workflows across repositories with minimal human intervention, Claude Opus 5.5 sets a new standard in terminal-based agentic coding. On Terminal-Bench 4.0, its default effort level beats Opus 5 at max effort for just a fifth of the cost, while matching GPT-6 Astra at roughly 40% of the cost.

In real-world engineering, it tackles massive codebases with extreme precision. It can independently migrate 680,000 lines of code in under a day, audit 200,000 lines in less than 3 hours with 60% fewer tokens, and refactor legacy software at a fraction of traditional costs.

Deep Knowledge Work and Analytical Reasoning

Claude Opus 5.5 sets a new benchmark in real-world knowledge work, scoring an industry-leading 1,846 Elo on GDPval-AA v2.1 across 44 professional occupations. At default medium effort, it outperforms GPT-6 Astra’s maximum effort while costing only a fifth as much per task.

Built for complex corporate analysis, it effortlessly creates thorough financial models, transforms them into executive-ready presentations, and conducts hallucination-free research. It also demonstrates high-level reasoning by proactively identifying and correcting errors in user instructions.

Natural and Human-like Communication

Addressing the verbosity of prior models, Claude Opus 5.5 adopts a clearer, more natural writing style that mirrors human executive communication. It prioritizes key takeaways upfront, writes concise and actionable code comments, and makes long-session collaboration smoother and vastly easier for human teams to audit and verify.

Superior Cost-Efficiency and Speed

Through architectural optimizations, Claude Opus 5.5 cuts total workload costs by 40% while boosting speeds by over 30%. Token prices drop 20% ($4 input / $20 output per 1M), and Prompt Cache Reads fall 60% to just $0.20 per million tokens.

Multimodal Vision & Text Reasoning

Claude Opus 5.5 natively supports visual inputs, enabling users to analyze complex charts, UI screenshots, and document pages alongside text prompts. By embedding visual data directly into its reasoning process, it decodes intricate diagrams and extracts deep, actionable insights with multi-modal precision.

Why Experience Claude Opus 5.5 on HIX AI

Eager to test the groundbreaking capabilities of Claude Opus 5.5? Discover the ultimate AI experience with maximum convenience on HIX AI today.

• Combine Web Intelligence with Massive Context: Harness HIX AI chat agent’s specialized Internet, News, and Academic search modes to gather targeted live data, then leverage Claude Opus 5.5’s massive context window to synthesize and analyze multi-document files.

• Benchmark Top Models Simultaneously: Beyond Claude Opus 5.5 from the Claude family, access top-tier models such as GPT-6 Sol, GPT-6 Luna, and Gemini 3.8 Flash. Paid users enjoy unlimited Agent access and can run up to 4 models at once to compare responses and select the ultimate output instantly.

• Zero-Friction Deep Reasoning: Access Claude Opus 5.5 instantly with zero configuration via HIX AI Chat agent—migrate massive projects, synthesize technical documents, and automate end-to-end tasks in one unified workspace.

Claude Opus 5.5 vs. Other Advanced Models