LLMAPI only
Claude Opus 4
Anthropic
Updated May 22, 2026 · Benchmarks via Artificial Analysis, specs & pricing via OpenRouter · Methodology · Report an error
Superseded by Claude Opus 4.1
Specifications
- Type
- LLM
- Access
- API only
- Released
- May 22, 2025
- License
- proprietary
- Context window
- 200,000 tokens
- Knowledge cutoff
- January 31, 2025
- Output speed
- 120 tok/s
- Latency (TTFT)
- 0.4s
- Input
- Text, Image
- Output
- Text
- API pricing
- $15.00 in · $75.00 out / 1M tokens
Capabilities
Function callingWeb search
Benchmarks
Reasoning
| GPQA Diamond | 79.6 |
| ARC-AGI-2 | 8.6 |
Coding
| SWE-bench Verified | 72.5 |
| Terminal-Bench | 39.2 |
| LiveCodeBench | 63.6 |
Agents
General
| MMLU | 88.8 |
| MMLU-Pro | 87.3 |
| Humanity’s Last Exam | 11.7 |
Our take
Anthropic’s Claude 4 flagship, built for long-horizon agentic coding and tool use with a hybrid instant/extended-thinking design.