Model Comparison
Claude Sonnet 4.5Llama 3.1 405B
Let's see who can write code better - Claude Sonnet 4.5 or Llama 3.1 405B
Model Information
Claude Sonnet 4.5
Description
Balanced Claude 4.5 model with excellent performance
Specifications
Context Window200K
Max Output8K
ReleasedSep 2025
API✓
Pricing (per 1M)
In / Out
$3/ $15
Key Features
Balanced performanceAdvanced reasoningCode generationMulti-modal capabilities
Strengths
- ✓Good price-performance ratio
- ✓Versatile capabilities
- ✓Fast inference
- ✓Strong at most tasks
Weaknesses
- ✗Not as powerful as Opus
- ✗Higher cost than Haiku
- ✗May struggle with very complex tasks
Agent Support
No known agents
Llama 3.1 405B
Description
Open-source frontier model with 405 billion parameters
Specifications
Context Window128K
Max Output4K
ReleasedJul 2024
API✗
Key Features
Open sourceSelf-hostableTool use supportMultilingualNo usage restrictions
Strengths
- ✓Fully open source
- ✓Can be self-hosted
- ✓Strong performance
- ✓No API costs if self-hosted
Weaknesses
- ✗Requires significant compute
- ✗Complex to deploy
- ✗No official API service
Agent Support
No known agents