Anthropic: Claude Opus 4
Claude Opus 4 is Anthropic’s most advanced AI model, designed for deep reasoning, coding, and long-context tasks. It supports a massive 200K token context window, delivers state-of-the-art code performance, and excels at multi-step problem solving. With “extended thinking” modes and robust safety layers, it’s built for complex enterprise, research, and creative use cases.
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🧠 Claude Opus 4 – Anthropic (aka Claude 4 Opus)
🚀 Model Overview
- Release Date: May 22, 2025 Artificial Analysis+15Wikipedia+15Medium+15
- Family: Top-tier version of Claude 4 (with sibling Sonnet 4) Omni+9Wikipedia+9Keywords AI+9
- Modalities: Text & image input, text output Google Cloud+4Anthropic+4Wikipedia+4
🧩 Core Design & Context
- Architecture: Hybrid reasoning model—supports instant responses and extended deep-thinking mode The Times of India+7Anthropic+7Anthropic+7
- Context Window: 200,000 tokens — largest publicly available setting Axios+15Anthropic+15Prompthub+15
- Extended Thinking: Summarized steps in long tasks, switchable thinking depth Wikipedia+14Anthropic+14Omni+14
⚙️ Strengths & Benchmarks
- Best-in-class coder: Leading SWE-bench result at 72.5% IT Pro+2Anthropic+2Anthropic+2
- Terminal-bench: ~43.2% Anthropic
- Agentic tasks: Sustained, thousands-of-step workflows—e.g., 7-hour autonomous coding sessions (e.g., at Rakuten) Google Cloud+5Anthropic+5Anthropic+5
- Long-horizon reasoning: Handles multi‑day engineering tasks, TAU-bench leader Anthropic+1Amazon Web Services, Inc.+1
💼 Tooling & API
- APIs: Available via Anthropic, AWS Bedrock, Google Vertex AI Anthropic+2Anthropic+2IT Pro+2
- Calling features:
- Function-calling
- Token counting, prompt caching, batch predictions, file API Google Cloud
- Thinking Modes: Two modes—default (fast) & extended (deep) Anthropic+1Amazon Web Services, Inc.+1
🔐 Safety & Reliability
- Safety Level: Deployed under Anthropic’s AI Safety Level 3 standard—strict safeguards tested extensively Anthropic
- Thought transparency: Now shows summarized logic chains to reduce exposure of internal reasoning Axios
- Alignment improvements: Lower incidents of reward hacking and harmful content compared to earlier generations Wikipedia+3Medium+3Anthropic+3
🎯 Use Cases
- Software engineering: Project-wide code generation, debugging, refactoring, API integrations
- AI agents: Self-managing agents, multi-step workflows, planning, document synthesis
- Research & planning: Long research tasks, strategic analysis, multi-document reasoning
- Creative tasks: High-quality prose, storytelling, multimodal concept design
🧠 TL;DR Snapshot
| Attribute | Claude Opus 4 |
|---|---|
| Release | May 22, 2025 |
| Context | 200 K tokens |
| Thinking Modes | Instant & Extended |
| Coding (SWE-bench) | 72.5% (world leader) |
| Extended Code Runs | 7 hours+ autonomous execution |
| Safety Standard | AI Safety Level 3 |
| APIs Available | Anthropic, AWS Bedrock, Google Vertex |
| Pricing | $15/$75 per million tokens (I/O)¹ |