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Claude Opus 4: Frontier Performance in Coding and Creative Work
Released on May 22, 2025 as part of the Claude Opus lineup, Claude Opus 4 sits alongside Claude Sonnet 4 and is positioned as a model pushing the frontier in coding, agentic search, and creative writing.
Built for complex, long-running tasks and agent workflows, it offers strong reasoning depth and sustained performance across extended projects. These capabilities make it an excellent fit for advanced development pipelines, autonomous agents, and creative or analytical tasks that require endurance, adaptability, and high-level intelligence.
Claude Opus 4: Key Specs
Below are Claude Opus 4's main specs and how they translate into real-world behavior.
- Context Window - 200,000 tokens: This extensive context capacity allows Claude Opus 4 to follow long conversations or review large documents while keeping earlier details accessible for deep, multi-step reasoning.
- Maximum Output Length - 32,000 tokens: The model can generate substantial, detailed responses, making it suitable for thorough explanations, structured reports, and multi-section content in a single output.
- Speed and Efficiency - Slower-paced performance: It responds more deliberately than lighter models, making Claude Opus 4 better suited for tasks where careful processing and clarity matter more than speed.
- Cost Efficiency - Positioned in a premium usage tier: The model's higher operating cost aligns with its advanced capabilities, making it most appropriate for specialized workloads where top-level performance is worth the investment.
- Reasoning and Accuracy - Highest-level reasoning ability: Claude Opus 4 excels at complex analysis, multi-step logic, and difficult problem-solving, delivering precise and reliable results even in demanding scenarios.
- Multimodal Capabilities - Supports text, code, and image input, outputs text: It can interpret diagrams, screenshots, and code snippets alongside written prompts, producing clear, coherent text responses from mixed media.
Compare Claude Opus 4, Claude Sonnet 4, and Claude Opus 4.1
A brief overview of how each model differs in power, speed, and use cases.
| Feature | Claude Opus 4 | Claude Sonnet 4 | Claude Opus 4.1 |
|---|---|---|---|
| Knowledge Cutoff | Mar 2025 | Mar 2025 | Mar 2025 |
| Context Window (Tokens) | 200,000 | 1,000,000 | 200,000 |
| Max Output Tokens | 32,000 | 64,000 | 32,000 |
| Input Modalities | Text, Code, Image | Text, Code, Image | Text, Code, Image |
| Output Modalities | Text | Text | Text |
| Latency (OpenRouter Data) | 2.82s | 1.06s | 1.78s |
| Speed | Slower than lighter models | Medium (low latency) | Slower than lighter models |
| Input / Output Cost per 1M Tokens | $15 / $75 | $3 / $15 | $15 / $75 |
| Reasoning Performance | Very High | Very High | Highest |
| Coding Performance (on SWE-bench Verified) | 72.50% | 72.70% | 74.50% |
| Best For | complex, long-running tasks and agent workflows | maintaining efficiency and responsiveness in diverse internal and external scenarios | tasks involving research, data analysis, and tool-assisted reasoning |
Best Cases to Use Claude Opus 4
Claude Opus 4 is best for complex, long-running tasks and agent workflows
- For students and learners: Use Claude Opus 4 to break down difficult topics, follow long explanations, and understand multi-step reasoning that supports deep learning and exploration.
- For developers: Handle large codebases, navigate multi-file logic, and build agents that can manage extended execution with consistent accuracy and contextual awareness.
- For businesses and teams: Produce detailed analyses, long-form reports, and well-structured insights that support strategic decisions and complex operational planning.
- For product teams and app builders: Build autonomous agents that execute multi-step workflows, maintain context over time, and deliver reliable results across long-running processes.
- For operations and support workflows: Manage intricate procedures, investigate layered issues, and provide thorough resolutions that improve support quality for complex environments.
- For content and marketing helpers: Create long-form content, refine deep narratives, and articulate complex ideas clearly across extended documents or multi-section materials.
How to Access Claude Opus 4
Accessing Claude Opus 4 is simple, with options that support both technical and instant-use needs.
1. Anthropic API
Claude Opus 4 is available through the official Anthropic API. This option requires an API key and billing plan, making it ideal for developers who need full control and want to integrate advanced AI into complex applications or automated systems.
2. EssayDone AI Chat
If you want fast, no-setup access, Claude Opus 4 is available through EssayDone AI Chat.
It offers the same underlying model output in a user-friendly interface, perfect for researchers, creators, and professionals who want immediate, frictionless access.
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FAQ
Here are some frequently asked questions about Claude Opus 4.
Yes. Claude Opus 4 delivers the highest level of reasoning capability, making it exceptionally strong for advanced analysis and deep problem-solving. Its reasoning rating places it at the top of the Claude family.
Claude Opus 4 costs $15 per 1M input tokens and $75 per 1M output tokens. It is one of the most premium models available, reflecting its top-tier performance.
Claude Opus 4 is optimized for complex, long-running tasks and agent workflows. It excels in scenarios requiring extended reasoning, autonomy, and highly accurate decision-making. It is ideal for users needing the strongest possible performance for demanding workloads.
Claude Opus 4 accepts text, code, and image inputs and produces text outputs. It performs exceptionally well across these modalities, supporting high-level analysis and interpretation, while maintaining its core strength in deep text reasoning.
Claude Opus 4 delivers advanced reasoning and strong overall capability. Claude Opus 4.1 further improves efficiency and response speed, offering more consistent performance. Claude Sonnet 4 provides solid results at a lower cost, though it does not match the analytical depth of the Opus models.
Using Claude Opus 4 in EssayDone AI Chat means you don't need an API key, don't face daily message limits, and aren't restricted by region. You can access ChatGPT and many other AI models on one platform with a single payment, all at a more affordable price.