Claude Opus 4.6

model
Anthropic

Current flagship. 1M token context. Ranked #1 among 65 non-reasoning models on Artificial Analysis. Also released as Claude Sonnet 4.6 (February 17, 2026, AA index 44, 1M context). Architecture and parameters undisclosed.

AA Intelligence Index: 53 (adaptive reasoning, max effort). Powers Claude Code, the agentic coding tool with $2.5B+ ARR. Proprietary.

Artificial AnalysisOpenRouter

Model Details

Context window 1,000,000

Variants

Name Parameters Notes
Claude Opus 4.6 — 1M context, AA index 53 (adaptive reasoning)
Claude Sonnet 4.6 — 1M context, AA index 44
frontiercodingreasoningagents

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