Start Chatting with Claude 3 Opus
Use Claude 3 Opus and its full model family, with more messages every day.
Claude 3 Opus: Top-Level Performance for Complex Tasks
Released on March 5, 2024 as part of the Claude Opus lineup, Claude 3 Opus sits alongside Claude 3 Haiku and is positioned as a best-in-class model for handling highly complex tasks with exceptional intelligence and fluency.
Designed for open-ended prompts and sight-unseen scenarios, it provides deep understanding and strong reasoning across a wide range of challenging contexts. These capabilities make it an excellent choice for advanced analysis, creative exploration, and workflows that demand reliable, high-level comprehension.
Claude 3 Opus: Key Specs
Below are Claude 3 Opus's main specs and how they translate into real-world behavior.
- Context Window - 200,000 tokens: This extensive context capacity enables Claude 3 Opus to manage long conversations or large documents while maintaining continuity across detailed, multi-step tasks.
- Maximum Output Length - 4,100 tokens: The model produces shorter, focused responses, making it suitable for concise explanations, summaries, and structured outputs that don't require long-form generation.
- Speed and Efficiency - Slower-paced performance: It responds more deliberately than lighter models, making Claude 3 Opus better suited for tasks where careful reasoning matters more than speed.
- Cost Efficiency - Premium pricing at $15 / $75 per 1M tokens: Its high cost reflects its advanced capability and depth, making it most appropriate for high-value workloads where accuracy and reliability are critical.
- Reasoning and Accuracy - Higher-level reasoning ability: The model handles complex instructions, analysis, and problem-solving with strong clarity, offering deeper insight than mid-tier options.
- Multimodal Capabilities - Supports text, code, and image input, outputs text: It can work with diagrams, screenshots, and code snippets alongside written prompts, producing coherent text responses from mixed content.
Compare Claude 3 Opus, Claude Opus 4 , and Claude 3 Haiku
A brief overview of how each model differs in power, speed, and use cases.
| Feature | Claude 3 Opus | Claude Opus 4 | Claude 3 Haiku |
|---|---|---|---|
| Knowledge Cutoff | Aug 2023 | Mar 2025 | Aug 2023 |
| Context Window (Tokens) | 200,000 | 200,000 | 200,000 |
| Max Output Tokens | 4,100 | 32,000 | 8,192 |
| Input Modalities | Text, Code, Image | Text, Code, Image | Text, Code, Image |
| Output Modalities | Text | Text | Text |
| Latency (OpenRouter Data) | 1.16s | 2.82s | 0.45s |
| Speed | Slow (slower than Claude 3 Haiku) | Slower than lighter models | Fast (similar speed as Claude 3.5 Haiku) |
| Input / Output Cost per 1M Tokens | $15 / $75 | $15 / $75 | $0.25 / $1.25 |
| Reasoning Performance | Very High | Very High | Average |
| Coding Performance (on SWE-bench Verified) | Unspecified | 72.50% | Unspecified |
| Best For | open-ended prompts and sight-unseen scenarios | complex, long-running tasks and agent workflows | achieving near-human levels of comprehension and fluency on complex tasks |
Best Cases to Use Claude 3 Opus
Claude 3 Opus is best for strong adaptability and depth when handling unpredictable or complex tasks.
- For students and learners: Use Claude 3 Opus to explore big questions, analyze unfamiliar material, and get clear explanations that help you understand new concepts quickly and confidently.
- For developers: Tackle ambiguous requirements, generate creative solutions, and handle complex logic when building features that need flexible, high-level reasoning.
- For businesses and teams: Interpret unstructured information, produce thoughtful analyses, and manage open-ended projects where clarity and adaptability are essential.
- For product teams and app builders: Create agents that perform well in dynamic or unpredictable situations, making products more resilient and capable in real-world contexts.
- For operations and support workflows: Understand unclear issues, reason through incomplete details, and produce well-considered guidance that improves response quality in nuanced situations.
- For content and marketing helpers: Develop creative ideas, explore new directions, and produce engaging narratives or messaging that benefit from open-ended, high-intelligence thinking.
How to Access Claude 3 Opus
Accessing Claude 3 Opus is straightforward, offering both technical and no-setup options.
1. Anthropic API
Claude 3 Opus is accessible via the official Anthropic API. You'll need an API key and billing plan, making this method ideal for developers who require maximum control and robust model integration.
2. EssayDone AI Chat
For quick, hassle-free access, you can use Claude 3 Opus in EssayDone AI Chat.
It provides the same model capabilities through an intuitive interface suited for research, writing, problem-solving, and professional work.
Explore More AI Models
Find the model you need-search or select to open its full profile.
14 models available
FAQ
Here are some frequently asked questions about Claude 3 Opus.
Yes. Claude 3 Opus provides higher-level reasoning capability, making it well suited for complex analytical tasks and nuanced problem-solving. Its reasoning rating places it among the strongest models in its generation.
Claude 3 Opus costs $15 per 1M input tokens and $75 per 1M output tokens. It is one of the premium-priced models in the Claude lineup due to its advanced capabilities.
Claude 3 Opus is optimized for open-ended prompts and sight-unseen scenarios. It excels in tasks requiring broad generalization, deep reasoning, and flexible interpretation. This makes it ideal for research, creative generation, and complex analysis.
Claude 3 Opus accepts text, code, and image inputs and produces text outputs. It handles multimodal content effectively for interpretation and reasoning, though its primary strength remains high-level text understanding.
Claude 3 Opus is a powerful earlier generation model, offering strong reasoning at a premium cost. Claude Opus 4 introduces improved accuracy and more efficient performance, while Claude Opus 4.1 further enhances reasoning consistency and speed. Both newer models generally outperform Claude 3 Opus while offering better value.
Using Claude 3 Opus 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.