Build AI powered apps for your work
Get started freeClaude 4 Sonnet vs Claude 3 Opus
Compare Claude 4 Sonnet and Claude 3 Opus. Build AI products powered by either model on Appaca.
Model Comparison
| Feature | Claude 4 Sonnet | Claude 3 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 |
Stop choosing. Use both.
With Appaca you don't have to pick — build apps that are powered by Claude 4 Sonnet, Claude 3 Opus, for your specific use case.
Build your first app free
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 3 Opus
Anthropic1. Intelligence & Reasoning
- Highest capability in the Claude 3 family
- Near-human comprehension and fluency
- Excels at MMLU, GPQA, GSM8K, advanced reasoning tasks
2. Complex Problem Solving
- Best for research, strategy, multi-step planning
- Handles ambiguous, open-ended tasks with ease
3. Vision & Multimodal Capabilities
- Strong chart/graph understanding
- Processes documents, technical diagrams, and dense visual data
4. Recall & Long-Context Reasoning
- Near-perfect recall (>99% on NIAH benchmark)
- Handles very large documents and multi-file workflows
5. Enterprise-Grade Accuracy
- Significantly reduced hallucinations
- High correctness rate for factual queries
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
textContent Repurposing System (1 → Many Channels)
Build a content repurposing system that extends your best messaging across channels while keeping the USP and persona challenges consistent.
Home Valuation Lead Follow-Up
Follow up with a homeowner who requested an online home valuation. Converts a cold lead into a listing consultation.
Uncover Precedents (Case Map + Misinterpretation Risks)
Create a precedent map for an area of law with key cases, rules/tests, and the risks of misreading precedent.
Best for Claude 3 Opus
textCategory Page Meta Tags
Write SEO meta titles and descriptions for multiple category pages. Bulk-generates optimized search snippets.
Vocabulary Exercise Set
Create vocabulary exercises to build and reinforce student word knowledge.
Email Subject Line Generator
Generate high-converting email subject lines that boost open rates using proven psychological triggers and A/B testing frameworks.