anthropic/claude-opus-4-1

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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.

8/5/2025

200,000 tokens

#18 Text (Instruction Following)

Specifications

Modalities

Input

image

text

file

Output

text

Supported Parameters

include_reasoning

max_tokens

reasoning

response_format

stop

structured_outputs

temperature

tool_choice

tools

top_k

top_p

Max Output Tokens

32,000

Leaderboard

Text

🏆OverallELO: 1,447

#31

🇯🇵JapaneseELO: 1,402

#21

🇨🇳ChineseELO: 1,461

#55

🇰🇷KoreanELO: 1,397

#25

🇬🇧EnglishELO: 1,458

#29

frenchELO: 1,468

#27

germanELO: 1,433

#32

spanishELO: 1,461

#21

russianELO: 1,442

#33

💻CodingELO: 1,506

#22

🧮MathELO: 1,432

#37

✍️Creative WritingELO: 1,441

#19

📝Instruction FollowingELO: 1,455

#18

🌶️Hard PromptsELO: 1,478

#23

💬Multi-TurnELO: 1,468

#21

Code

🏆OverallELO: 1,384

#27