Overview
Claude 4.5 was Anthropic's flagship model before the 4.7 series. It still delivers excellent performance for most tasks and is now available at reduced pricing, making it a cost-effective choice for production applications that don't need the absolute latest capabilities.
Context Window
200K tokens
Knowledge Cutoff
September 2025
Pricing (Input)
$2.00 / 1M tokens
Pricing (Output)
$10.00 / 1M tokens
✅Strengths
- ✓Proven, reliable performance
- ✓Lower cost than 4.7 series
- ✓200K context for long documents
- ✓Strong coding and analysis capabilities
- ✓Well-tested in production environments
⚠️Weaknesses
- ✗Older knowledge cutoff (Sept 2025)
- ✗Less capable than 4.7 Opus/Sonnet
- ✗Being phased out for newer models
- ✗Closed weights - API only
Best Use Cases
💬 Customer Support
High-volume chatbots
💻 Code Assistance
Generation, review, docs
📊 Analysis
Reports, insights
📝 Content
Blog posts, marketing
🎓 Education
Tutoring, explanations
🔍 Research
Summaries, reviews
Benchmarks
MMLU88.5%
HumanEval86.2%
GSM8K89.1%