Anthropic: Claude Sonnet 5 (new) Coding Benchmark
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...
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Coding Performance
Coding benchmarks and performance metrics for development tasks
Kilo Bench
- % Completion on Terminal Bench 2.0
- 59.6%
- Cost per attempt (USD)
- $36.19
- Benchmark
- Terminal Bench 2.0
Official Kilo eval results. Cost is averaged per complete benchmark attempt.
Real-World Usage
Real-world usage statistics from the Kilo Code community
Weekly Token Usage
Mode Rankings (Last Week)
Where this model ranks for each built-in mode
Code
Write, modify, and refactor code
Ask
Get answers and explanations
Debug
Diagnose and fix software issues
Orchestrator
Coordinate tasks across multiple modes
Real-world metrics from the Kilo Code Leaderboard
Pricing
Cost per 1 million tokens
Example Cost
Analyzing a 10,000 line codebase (≈40k input tokens, 10k output tokens) costs approximately $0.1800
Coding Capabilities
Features and parameters relevant to coding tasks
Coding Features
Pricing details from OpenRouter
Technical Details
Architecture and implementation specifications
- Model ID
- anthropic/claude-sonnet-5
- Created
- June 30, 2026
- Tokenizer
- Claude
- Input Modalities
- TextImageFile
- Context Window
- 1,000,000 tokens
- Max Completion Tokens
- 128,000 tokens
- Input Price
- $2.00 per 1M tokens
- Output Price
- $10.00 per 1M tokens
- Cache Read Price
- $0.20 per 1M tokens
- Cache Write Price
- $2.50 per 1M tokens
- Content Moderation
- Enabled
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