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Claude Opus 4.1

Model facts

Provider: Anthropic
Released: 2025-08-05
Retirement: 2026-08-05

Technical details

Model ID: claude-opus-4-1
Status: Active
Context window: 200,000 tokens
Max output: 32,000 tokens
Knowledge cutoff: 2025-03-31
Input modalities: Text, Image, PDF
Output modalities: Text
Pricing (per 1M tokens): $15 in / $75 out
Tool use: Yes

Links

models.dev entry

Claude Opus chronology

Preceded by

Succeeded by

Claude Opus 4.5

Claude chronology

Preceded by

Claude Sonnet 4

Succeeded by

Claude Sonnet 4.5

A large language model by Anthropic.