Claude 4 Sonnet
Parameters
Undisclosed
Context Length
200K
Modality
Text
Architecture
Undisclosed
License
Proprietary
Release Date
15 Jan 2025
Knowledge Cutoff
Jan 2025
API Pricing (per 1M)
Input: $3.00 · Output: $15.00
Evaluation Benchmarks
Rank
#76
| Benchmark | Score | Rank |
|---|---|---|
Software Engineering | 0.77 | 4 |
Graduate-Level QA | 0.754 | 59 |
Agentic Index | 0.18 | 78 |
General Text | auto (16k) 1401 Standard 1391 | 94 101 |
Coding Index | auto (16k) 0.38 | 103 |
Intelligence Index | 0.17 | 138 |
StackEval Archived | 0.978 | 🥇 1 |
QA Assistant Archived | 0.96 | 7 |
Coding Archived | 0.61 | 9 |
Summarization Archived | 0.817 | 10 |
Rankings
Overall Rank
#76
Coding Rank
#32
About Claude 4 Sonnet
Claude 4 Sonnet is a versatile multimodal model from Anthropic balancing rapid execution with configurable extended thinking modes. It is optimized for enterprise automation, visual document analysis, and dependable long-context retrieval.
Technical Specifications
Architecture specifications are undisclosed for proprietary models.
Attention
Attention Structure
Multi-Head Attention
Attention Heads
Undisclosed
Key-Value Heads
Undisclosed
Attention Head Dimension
Undisclosed
Position Embedding
Absolute Position Embedding
RoPE Theta
Undisclosed
Sliding Window Attention
Undisclosed
Sliding Window Size
Undisclosed
Sliding Window Ratio
Undisclosed
Linear Attention
Undisclosed
Linear Attention Ratio
Undisclosed
Normalization
Undisclosed
Activation Function
Undisclosed
Dimensions
Hidden Dimension Size
Undisclosed
Number of Layers
Undisclosed
FFN Intermediate Size (Dense)
Undisclosed
Multi-Token Prediction Heads
Undisclosed
Tokenizer
Vocabulary Size
Undisclosed
Resources
About Claude 4
Anthropic's fourth generation Claude models with advanced reasoning, extended context windows up to 200K tokens, and configurable thinking effort levels. Features improved safety alignment, nuanced understanding, and sophisticated task completion. Includes Opus (most capable), Sonnet (balanced), and Haiku (fast) variants, with thinking modes that enable transparent chain-of-thought reasoning for complex problems.