Chat with Claude Haiku 4.5
Powered by Anthropic.
Quick answer
Fast, concise response
Rewrite this text
Cleaner & clearer
Make a list
Organize anything fast
Simple explanation
Plain language
Claude Haiku 4.5 is Anthropic's fastest and most affordable model: instant responses for high-volume tasks, drafts and quick lookups.
What Claude Haiku 4.5 is best for
- Quick lookups, definitions and short answers
- First drafts of emails, captions and social posts
- Bulk processing: classify, summarise or tag at scale
- Rapid iteration on ideas before switching to a larger model
- Cost-efficient coding snippets and simple bug fixes
How to use Claude Haiku 4.5
Step 1
Give Claude Haiku 4.5 the full context: audience, goal, source material, constraints and preferred structure.
Step 2
Ask for careful reasoning, tradeoffs, risks and assumptions when the task involves judgment or nuance.
Step 3
Use follow-ups to tighten wording, adjust tone, produce tables or compare alternatives before finalizing.
Example prompts
Frequently asked questions
When should I use Haiku instead of Sonnet?
Use Haiku when you need a fast, cheap answer and the task is straightforward. Switch to Sonnet or Opus for anything requiring sustained reasoning.
How fast is Claude Haiku 4.5?
Haiku is Anthropic's lowest-latency model, typically responding in under 2 seconds for short prompts.
Is Haiku as accurate as Sonnet?
On simple tasks the quality is very close. On complex reasoning or long-form writing, Sonnet and Opus pull ahead.
Can I use Haiku for free?
Yes. Haiku consumes fewer credits than Sonnet or Opus, making it the best choice for maximising your free monthly allowance.
Related tools and comparisons
More questions about AI models? Read our
AI models FAQ:
comparisons, picks for coding/writing, and what each model is best at.
That's your free message. Want to keep going?
Create a free account to get more messages, save your chats, and try every AI model.
