Claude 4.5 Opus
Anthropic
★ Free Tier Available🌐 Text & Logic📊 3+ Use Cases
Overview
Anthropic's most intelligent model, engineered for 'Agentic Persistence.' It can manage long-running software engineering tasks across hundreds of files without losing track of the architecture. Known for high emotional intelligence and nuanced prose, it is the preferred choice for writers and coders who need a partner that 'gets it' on the first try. Its robust safety features also make it ideal for enterprise deployments.
How Claude 4.5 Opus works:
- 1
Use XML tags to define code structure
- 2
Assign it a persona with clear goals
📋 Quick Specs
Pricing
Pro: $20/mo | API: $15/1M input
Context Window
200K tokens
API Access
✅ Yes
Released
December 2025
Supports:
textimagecode
🚀 Try This Prompt
<task>Refactor this entire codebase to use TypeScript strict mode. Maintain all existing functionality and add comprehensive type definitions.</task>
💡 Paste this into Claude 4.5 Opus to see it in action.
Details
Best For
Full-stack DevelopmentLegal AnalysisCreative Literature
Limitations
- ! Strict safety filters
- ! Subscription required for heavy use
Developer Resources
Listing Info
PublisherAnthropic
CategoryText & Logic
UpdatedJan 2026