CL
Claude Opus 5.1
Release date: 2026-09-05Views: 145
Parameters
No data
Context length
No data
Multilingual
No data
Reasoning ability
No data
Claude Opus 5.1 is an AI model published by Anthropic, released on 2026-09-05, for Reasoning model.
Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology
Claude Opus 5.1
Model basics
Reasoning traces
Supported
Thinking modes
Thinking modes not supported
Context length
No data
Max output length
No data
Model type
Reasoning model
Modality (in / out)
Text → Text
Release date
2026-09-05
Model file size
No data
MoE architecture
No
Total params / Active params
No data / Not applicable
Knowledge cutoff
No data
Claude Opus 5.1
Open source & experience
Code license
Proprietary
Weights license
Proprietary
GitHub repo
N/A
Hugging Face
N/A
Live demo
N/A
Claude Opus 5.1
Official resources
Paper
N/A
DataLearnerAI blog
N/A
Claude Opus 5.1
API details
API speed
No data
No public API pricing yet.
Claude Opus 5.1
Publisher
Anthropic
View publisher details Claude Opus 5.1
Model Overview
Claude Opus 5.1 is an AI model published by Anthropic, released on 2026-09-05, for Reasoning model.
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