Claude 4.5 Opus Thinking
Parameters
-
Context Length
200K
Modality
Text
Architecture
Dense
License
Proprietary
Release Date
1 Nov 2025
Knowledge Cutoff
-
Technical Specifications
Attention Structure
Multi-Head Attention
Hidden Dimension Size
-
Number of Layers
-
Attention Heads
-
Key-Value Heads
-
Activation Function
-
Normalization
-
Position Embedding
Absolute Position Embedding
Claude 4.5 Opus Thinking
Claude 4.5 Opus with standard thinking mode for balanced performance and efficiency. Strong results across web development (Elo 1510) and comprehensive benchmark performance. Delivers thoughtful responses with visible reasoning process. Suitable for complex tasks requiring transparency and explainability while maintaining good latency characteristics.
About Claude 4.5
Enhanced Claude models with further improvements in reasoning, coding, and agentic capabilities. Features advanced thinking modes with adjustable effort levels (high, medium, standard) for optimal performance-latency tradeoffs. Excels at complex analysis, software development, web development, and long-context understanding. Includes thinking variants that expose reasoning process for improved transparency.
Other Claude 4.5 Models
Evaluation Benchmarks
Rank
#23
| Benchmark | Score | Rank |
|---|---|---|
Web Development WebDev Arena | 1510 | 🥇 1 |
Coding Aider Coding | 0.72 | 6 |
Rankings
Overall Rank
#23
Coding Rank
#10