Claude Opus 4.1

Claude Opus 4.1

Developer	Anthropic
Release date	August 5, 2025
Family	Claude
Generation	Claude 4.1
Level
Context window	200K tokens
Max output	32K tokens
Input	Image, text, file
Output	Text
Knowledge cutoff	2025-03-31
Weights	Closed
Predecessor	Claude Opus 4
Successor	Claude Opus 4.5
Website	anthropic.com
Links	Model card

Part of a series on

input: $15.00
cached: $1.50
output: $75.00
cache write: $18.75
Context: 200Ktokens
Released: 1y ago

Specifications

Model

Developer: Anthropic
Family: Claude Claude 4.1
Type: Language model
Released: August 5, 2025
Model ID: anthropic/claude-opus-4.1

Capabilities

Input → output: Image, text, file → Text
Max output: 32K tokens
Tokenizer: Claude
Knowledge cutoff: 2025-03-31

Weights

Openness: Closed

Sources:models.devOpenRouter

Metadata synced Nov 3, 2026, 11:17 PM UTC

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