Claude Haiku 4.5 Thinking
Parameters
-
Context Length
200K
Modality
Text
Architecture
Dense
License
Proprietary
Release Date
1 Oct 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 Haiku 4.5 Thinking
Fast Claude 4.5 model with thinking mode for efficient reasoning. Good coding performance (72.81 LiveBench Coding) and solid capabilities across tasks. Features visible reasoning process at lower latency than larger models. Suitable for applications requiring explainability without the computational cost of Opus or Sonnet variants.
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
#24
| Benchmark | Score | Rank |
|---|---|---|
Agentic Coding LiveBench Agentic | 0.42 | 15 |
Mathematics LiveBench Mathematics | 0.78 | 20 |
Data Analysis LiveBench Data Analysis | 0.69 | 22 |
Coding LiveBench Coding | 0.73 | 24 |
Reasoning LiveBench Reasoning | 0.62 | 26 |
Web Development WebDev Arena | 1297 | 28 |
Rankings
Overall Rank
#24
Coding Rank
#41