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Get started freeClaude 4 Opus vs Claude 4 Sonnet
Compare Claude 4 Opus and Claude 4 Sonnet. Build AI products powered by either model on Appaca.
Model Comparison
| Feature | Claude 4 Opus | Claude 4 Sonnet |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Model Type | text | text |
| Context Window | 200,000 tokens | 1,000,000 tokens |
| Input Cost | $15.00/ 1M tokens | $3.00/ 1M tokens |
| Output Cost | $75.00/ 1M tokens | $15.00/ 1M tokens |
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Kelvin Htat
Business
Apps
New appStrengths & Best Use Cases
Claude 4 Opus
Anthropic- Highest capability in the family: described as “our most powerful model yet” by Anthropic.
- Exceptional at long-running tasks requiring thousands of steps and sustained focus (e.g., continuous codebase work for hours).
- Excellent performance on benchmarks: e.g., SWE-bench 72.5 % and Terminal-bench 43.2 %.
- Designed for complex agentic workflows, deep reasoning, tool use, and large context windows.
- Placed under a higher safety classification (ASL-3) due to its frontier capability and risk profile.
Claude 4 Sonnet
Anthropic- Hybrid reasoning: supports both fast (“near-instant”) and extended thinking modes.
- Optimised for responsiveness, cost and high-volume production workloads.
- Strong coding performance relative to prior Sonnet versions (improved over Sonnet 3.7).
- Available even in free tiers (alongside paid plans).
- Better suited for general-purpose use and agents where speed + cost-efficiency matter.
Prompts to Get Started
Use these prompts to power AI products you build on Appaca. Each works great with the models above.
Best for Claude 4 Opus
textDestination Comparison Guide
Write a destination comparison guide helping travelers choose between two similar destinations. Objective, structured, and entertaining.
Delinquent Rent Notice
Write a professional delinquent rent notice letter. Clear, firm, and legally informative without being aggressive.
Difficult Conversation Script
Prepare a script and opening for a difficult personal or professional conversation. Structures the message for clarity and care.
Best for Claude 4 Sonnet
textAcquisition Target Analysis
Analyse a potential acquisition target with key financial and strategic criteria.
Terms of Sale
Draft terms of sale for an e-commerce or product business.
Seller Net Proceeds Estimate Email
Send a seller a net proceeds estimate email in plain language. Sets realistic expectations before listing.