Claude Haiku 4.5
Claude Haiku 4.5 is the fastest and cheapest model in the Claude 4 family.
Overview
Claude Haiku 4.5 is the efficiency flagship of the Claude 4 family. It is designed to be the fastest, most affordable model that still provides intelligent, human-aligned reasoning. It is ideal for high-volume tasks like content moderation, simple data extraction, and real-time chat support.
Unique Factor
The best combination of frontier-level intelligence and sub-cent pricing in the industry.
Key Capabilities
Benchmarks
Top Use Cases
Real-time Content Moderation
Analyzing thousands of user posts per second for safety violations.
Detailed Features
Ultra-low Latency: Instant responses for real-time user experiences.
Sub-cent Pricing: The most affordable way to access the Claude 4 intelligence tier.
Native Vision: Fast and accurate processing of images and documents for classification.
Tool-use Proficiency: Reliable enough for thousands of daily API-driven automations.
200K Context Window: Massive context for a 'mini' model, allowing for long-form input.
Strict Safety Alignment: Maintains brand safety even in the most high-volume environments.
✓ Strengths & Pros
- • Cheapest frontier-tier model
- • Incredibly fast
- • Reliable for structured data extraction
✕ Limitations & Cons
- • Lacks the deep reasoning of Opus
- • Short-form answers (not for long-form essays)
Ideal Usage & Target Audience
Best For
Startups building at scale, social media platforms, and data processing teams.
Not Recommended For
Researchers or engineers working on complex, multi-step logic.
API Implementation
pythonimport anthropic
client = anthropic.Anthropic()
client.messages.create(model='claude-4-haiku', messages=[{'role': 'user', 'content': 'Hi'}])Check the official documentation for full SDK details.
Learn to Master This Model
Take our free structured Claude course — from basics to advanced techniques.
Quick Links
Technical Specs
Developer
Industry leader in AI safety and reasoning — the creators of Claude, the world's most nuanced and steerable LLM family.
Prompt Library
Browse Coding Prompts →
Previous Version
Claude 3 5 Haiku →