Claude Opus 4.5, released on November 24, 2025, is Anthropic’s latest AI model, excelling in coding, agents, and computer use, while also improving performance on everyday tasks like deep research and working with slides and spreadsheets. It is available across Anthropic’s apps, API, and major cloud platforms, priced at $5/$25 per million tokens, making advanced AI capabilities more accessible.
Performance and User Feedback
Claude Opus 4.5 demonstrates state-of-the-art results in real-world software engineering, outperforming previous models like Sonnet 4.5 in efficiency, reasoning, and multi-step task execution. Early testers and customers highlight its ability to handle ambiguity, complex bugs, and long-horizon autonomous tasks with fewer errors and token usage reductions up to 65%. It excels in planning, tool calling, code migration, refactoring, and long-context storytelling, generating well-organized content such as 10-15 page chapters.
Benchmark Achievements
The model scored higher than any human candidate on a difficult internal engineering take-home exam, showcasing superior technical ability and judgment under time constraints. It leads across 7 of 8 programming languages in the SWE-bench Multilingual benchmark and shows creative problem-solving in agentic tasks, such as finding legitimate workarounds within policy constraints. Claude Opus 4.5 also improves vision, reasoning, and mathematics skills, and achieves a 15% performance boost on deep research tasks through enhanced context management and multi-agent coordination.
Safety and Alignment
Claude Opus 4.5 is Anthropic’s most robustly aligned and safest model to date, with significant improvements in resisting prompt injection attacks and other misaligned behaviors. It is designed to avoid cooperation with misuse and to maintain reliability in critical tasks, making it harder to trick than other frontier models.
Developer Platform Enhancements
The Claude Developer Platform introduces an effort parameter allowing developers to balance speed and capability, with Opus 4.5 using dramatically fewer tokens than predecessors while achieving better or comparable results. The model supports longer runtimes, advanced tool use, and efficient management of multi-agent systems, enabling complex workflows with less intervention.
Product Updates
Claude Code now features an improved Plan Mode that builds precise, user-editable plans and executes them thoroughly. It is available on desktop with support for parallel local and remote sessions. The Claude app removes conversation length limits by summarizing context automatically. Claude for Chrome and Claude for Excel have expanded availability, leveraging Opus 4.5’s strengths in handling long-running tasks and spreadsheet automation. Usage caps specific to Opus 4.5 have been adjusted to support daily work for Max and Team Premium users.
Strategic Partnerships and Commitments
Anthropic announced strategic partnerships with Microsoft and NVIDIA to scale Claude AI on Microsoft Azure, committing $30 billion in Azure compute capacity and expanding access to enterprise customers. Additionally, Anthropic collaborates with the Rwandan government and ALX to provide AI education to hundreds of thousands across Africa.
Claude Opus 4.5 represents a significant advancement in AI capabilities, particularly in software engineering, autonomous agent workflows, and safety alignment. It offers improved efficiency, reasoning, and creative problem-solving, backed by strong user and benchmark validation. The model’s integration into developer tools and consumer apps enhances productivity and usability, while strategic partnerships ensure broad access and impact.
