Large Language ModelText Generation

Claude Opus 4.1

Enhanced Claude 4 with improved agentic capabilities

Released 2025-08-05

Context Window

200K

API Access

Available

Benchmark Performance

reasoning

reasoning

Graduate-Level Google-Proof Q&A

80.9%

coding

coding

HumanEval

91.0%

conversation

conversation

Chatbot Arena Elo

1437.0Elo