Introducing Claude Opus 4.5

Announcements Introducing Claude Opus 4.5 Nov 24, 2025 Our newest model, Claude Opus 4.5, is available today. It’s intelligent, efficient, and the best model in the world for coding, agents, and computer use. It’s also meaningfully better at everyday tasks like deep research and working with slides and spreadsheets. Opus 4.5 is a step forward in what AI systems can do, and a preview of larger changes to how work gets done. Claude Opus 4.5 is state-of-the-art on tests of real-world software engineering: Opus 4.5 is available today on our apps, our API, and on all three major cloud platforms. If you’re a developer, simply use claude-opus-4-5-20251101 via the Claude API . Pricing is now $5/$25 per million tokens—making Opus-level capabilities accessible to even more users, teams, and enterprises. Alongside Opus, we’re releasing updates to the Claude Developer Platform , Claude Code , and our consumer apps . There are new tools for longer-running agents and new ways to use Claude in Excel, Chrome, and on desktop. In the Claude apps, lengthy conversations no longer hit a wall. See our product-focused section below for details. First impressions As our Anthropic colleagues tested the model before release, we heard remarkably consistent feedback. Testers noted that Claude Opus 4.5 handles ambiguity and reasons about tradeoffs without hand-holding. They told us that, when pointed at a complex, multi-system bug, Opus 4.5 figures out the fix. They said that tasks that were near-impossible for Sonnet 4.5 just a few weeks ago are now within reach. Overall, our testers told us that Opus 4.5 just “gets it.” Many of our customers with early access have had similar experiences. Here are some examples of what they told us: Opus models have always been “the real SOTA” but have been cost prohibitive in the past. Claude Opus 4.5 is now at a price point where it can be your go-to model for most tasks. It’s the clear winner and exhibits the best frontier task planning and tool calling we’ve seen yet. Claude Opus 4.5 delivers high-quality code and excels at powering heavy-duty agentic workflows with GitHub Copilot. Early testing shows it surpasses internal coding benchmarks while cutting token usage in half , and is especially well-suited for tasks like code migration and code refactoring. Claude Opus 4.5 beats Sonnet 4.5 and competition on our internal benchmarks, using fewer tokens to solve the same problems . At scale, that efficiency compounds. Claude Opus 4.5 delivers frontier reasoning within Lovable's chat mode , where users plan and iterate on projects. Its reasoning depth transforms planning—and great planning makes code generation even better. Claude Opus 4.5 excels at long-horizon, autonomous tasks , especially those that require sustained reasoning and multi-step execution. In our evaluations it handled complex workflows with fewer dead-ends. On Terminal Bench it delivered a 15% improvement over Sonnet 4.5, a meaningful gain that becomes especially cle

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