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Get started freeClaude 4.5 Sonnet vs Claude 3 Haiku
Compare Claude 4.5 Sonnet and Claude 3 Haiku. Build AI products powered by either model on Appaca.
Model Comparison
| Feature | Claude 4.5 Sonnet | Claude 3 Haiku |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Model Type | text | text |
| Context Window | 1,000,000 tokens | 200,000 tokens |
| Input Cost | $3.00/ 1M tokens | $0.25/ 1M tokens |
| Output Cost | $15.00/ 1M tokens | $1.25/ 1M tokens |
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With Appaca you don't have to pick — build apps that are powered by Claude 4.5 Sonnet, Claude 3 Haiku, for your specific use case.
Build your first app freeStrengths & Best Use Cases
Claude 4.5 Sonnet
Anthropic1. Best-in-class coding performance
- #1 on SWE-bench Verified (77.2% standard, 82.0% high-compute).
- Excels at debugging, architecture, and multi-file code generation.
- Maintains coherence for extremely long tasks (30+ hours).
2. State-of-the-art computer use & agents
- Leads OSWorld at 61.4%.
- Strongest model for agentic workflows, multi-step tool use, and real computer control.
- Powering Claude Code, the new Claude Agent SDK, and Chrome agent actions.
3. Advanced reasoning & math
- Large improvements across reasoning-heavy benchmarks (AIME, MMMLU, τ2-bench, Terminal-Bench).
- Deep multi-step reasoning with extended or interleaved thinking.
4. High alignment & safety
- Most aligned Claude model to date with reduced deception, hallucinations, sycophancy, and harmful compliance.
- Strong protections against prompt injection for agentic tasks (ASL-3 safeguards).
5. Domain-expert performance
- Notable gains in finance, law, medicine, and STEM tasks.
- Trusted by early customers for long-context legal analysis, multi-file engineering, security research, and red-teaming.
Claude 3 Haiku
Anthropic1. Speed
- Fastest model in the Claude 3 family
- Near-instant responses for chat, support, and live tools
2. Efficiency
- Most affordable model
- Ideal for massive-scale applications and low-latency use cases
3. Practical Use Cases
- Customer support
- Translations
- Moderation
- Logistics, inventory systems
- Extracting insights from unstructured data
4. Vision Skills
- Handles charts, images, and diagrams quickly
- Useful for scanning large volumes of visual data
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 4.5 Sonnet
textSystem Design Document
Write a system design document for a new service or feature.
Nurture Email Sequence Copy
Write persuasive copy for a multi-email sales nurture sequence.
Annotated Bibliography Entry
Write an annotated bibliography entry for an academic source.
Best for Claude 3 Haiku
textWeekend City Itinerary
Create a packed but achievable weekend city travel itinerary. Covers the best of a destination in just 48 hours.
Distraction Log Analysis
Analyse a distraction log to find patterns and suggest productivity improvements.
Classroom Discussion Protocol
Design a structured discussion protocol to increase student participation and depth.