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Get started freeClaude 4 Sonnet vs Claude 4 Opus
Compare Claude 4 Sonnet and Claude 4 Opus. Build AI products powered by either model on Appaca.
Model Comparison
| Feature | Claude 4 Sonnet | Claude 4 Opus |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Model Type | text | text |
| Context Window | 1,000,000 tokens | 200,000 tokens |
| Input Cost | $3.00/ 1M tokens | $15.00/ 1M tokens |
| Output Cost | $15.00/ 1M tokens | $75.00/ 1M tokens |
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Strengths & Best Use Cases
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.
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.
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 Sonnet
textProfessional Personal Bio
Write a polished professional bio for websites, LinkedIn, or speaking engagements. Balances credentials with personality.
Diagnostic Pre-Assessment
Create a diagnostic assessment to identify students' prior knowledge before a unit.
Insurance Needs Analysis
Analyse insurance coverage needs for an individual or business.
Best for Claude 4 Opus
textSeller Consultation Follow-Up
Follow up after a seller listing consultation with a professional summary email. Reinforces your CMA and listing strategy.
Landing Page Long-Form Copy
Write complete long-form sales page copy from headline to CTA.
Team Charter
Create a team charter that aligns a team on purpose, norms, and ways of working.