Claude Opus 4.6
High-end Claude for difficult coding, planning, and slower expert reasoning
ECI STANDING#24 of 266
SCORE155.34153.7–157.21 CI
FRONTIER LAGLaunched 1.8 months behindScores about what GPT-5.2 Pro did in December 2025.
SCORES LIKE THESE MODELSDeepSeek V4 Pro 0813DeepSeek · Aug 2026155.47GPT-5.2 ProOpenAI · Dec 2025155.38GLM-5.3Z.ai (Zhipu AI) · Aug 2026155.25
Full Epoch Capabilities Index ranking ↗Qwen3.8 Max (0902)Alibaba · Sep 2026155.22
From the lab
Launch announcement · Feb 5, 2026Released Claude Opus 4.6RELEASE DATEFeb 5, 2026
WEIGHTSClosed weights
CONTEXT WINDOW1M
MAX OUTPUT128K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image, pdf
OUTPUTStext
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.