Claude 4.5Released 2025-08-15
Claude Sonnet 4.5
Strong all-rounder with proven reliability
Family
Claude 4.5
Release Date
2025-08-15
Best For
Production workloads, coding, analysis, content generation
Overview
Claude Sonnet 4.5 delivers strong performance across coding, analysis, and content generation at the same $3/$15 pricing. With a 200K context window and 64K max output, it remains a solid choice for production applications that don't need the 1M context of Sonnet 4.6.
Pricing
Input / 1M tokens
$3.00
Output / 1M tokens
$15.00
Context Window
200K
Max Output
64K
API model ID:
claude-sonnet-4-5Key Features
✓Same pricing as Sonnet 4.6 at $3/$15 per MTok
✓64K token max output
✓200K token context window
✓Excellent coding and analytical capabilities
✓Proven stability in production environments
✓Fast response times for interactive applications
Use Cases
General-purpose coding and debugging
Content creation and copywriting
Data analysis and report generation
Customer-facing chatbots and assistants
API-powered applications at scale
Benchmarks
| Benchmark | Score |
|---|---|
| Graduate-Level Reasoning (GPQA) | 75.3% |
| Coding (SWE-bench Verified) | 45.8% |
| MMLU (5-shot) | 89.0% |
| TAU-bench (Tool Use) | 51.0% |