Claude 3 Opus
Anthropic's most capable model with exceptional reasoning abilities
Claude 3 Opus
Anthropic • March 2024
Training Data
Up to early 2023
Claude 3 Opus
March 2024
Parameters
~175 billion
Training Method
Constitutional AI
Context Window
200,000 tokens
Knowledge Cutoff
April 2024
Key Features
Multimodal • Long Context • Safety Focus
Capabilities
Reasoning: Excellent
Coding: Very Good
Safety: Outstanding
What's New in This Version
Better reasoning and safety over Claude 2
Anthropic's most capable model with exceptional reasoning abilities
What's New in This Version
Better reasoning and safety over Claude 2
Technical Specifications
Key Features
Capabilities
Other Anthropic Models
Explore more models from Anthropic
Claude Haiku 5.5
The final model of the Claude 5.5 wave and Anthropic's cheapest, fastest, most capable small model, built for high-volume, latency-sensitive work such as classification, extraction, routing, and computer use
Claude Opus 5.5
Anthropic's recommended default for long-running agentic coding and knowledge work — Fable 5.1-level performance on most tasks at Opus pricing, and the first release of the 5.5 wave
Claude Sonnet 5.5
The second model of the Claude 5.5 wave and Anthropic's fastest Sonnet yet — a lower-cost complement to Opus 5.5 for well-scoped everyday tasks, bug fixing, and polished documents, slides, and spreadsheets