Claude 4.5 Sonnet vs Claude 3 Haiku

1. 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.

1. 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