AnthropicClaude 4.1Arena #19Aug 5, 2025
Claude Opus 4.1
Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains in multi-file code refactoring, debugging precision, and detail-oriented reasoning. The model supports extended thinking up to 64K tokens and is optimized for tasks involving research, data analysis, and tool-assisted reasoning.
Context Window
200K
tokens
Max Output
32K
tokens
Released
Aug 5, 2025
Arena Rank
#19
of 305 models
Output Speed
68
tokens/sec
Time to First Token
1.8s
TTFT
Capabilities
👁Vision
🧠Reasoning
🔧Tool Calling
⚡Prompt Caching
🖥Computer Use
🎨Image Generation
Supported Parameters
Include Reasoning
Show reasoning tokens
Max Tokens
Output length limit
Reasoning
Extended thinking
Response Format
JSON mode / structured output
Stop Sequences
Custom stop tokens
structured_outputs
Temperature
Controls randomness
Tool Choice
Control tool usage
Tool Calling
Function calling support
Top K
Top-K sampling
Top P
Nucleus sampling
Pricing Comparison
| Router | Input / 1M | Output / 1M | Cached Input / 1M |
|---|---|---|---|
| Requesty★ | $15.00 | $75.00 | $1.50 |
| OpenRouter | $15.00 | $75.00 | $1.50 |
| Vercel AI | $15.00 | $75.00 | — |
| Martian | $15.00 | $75.00 | $1.50 |
Benchmarks
Artificial Analysis
Intelligence IndexArtificial Analysis
72/100Coding IndexArtificial Analysis
68/100Math IndexArtificial Analysis
80/100MMLU-PROArtificial Analysis
0.795/1GPQA DiamondArtificial Analysis
0.715/1MATH-500Artificial Analysis
0.905/1AIME 2024Artificial Analysis
0.55/1Humanity's Last ExamArtificial Analysis
0.112/1LiveCodeBenchArtificial Analysis
0.685/1SciCodeArtificial Analysis
0.395/1Model IDs
Requesty
anthropic/claude-opus-4-1OpenRouter
anthropic/claude-opus-4.1Tags
visionreasoningtool-callingcachingcomputer-use
Available Regions
EUUS