How to Use Claude Haiku 5.5 for Free (No API Key Needed)
A step-by-step guide to using Claude Haiku 5.5 free online on Haiku55: guest messages, free daily credits, web search with sources, Fast / Smart / Deep modes and tips for better answers.
Haiku55 Team
Want to try Claude Haiku 5.5 without setting up an API key or a credit card? On Haiku55 you can chat with Haiku 5.5 free, right in your browser. Here's how to get the most out of it.
Step 1: Start chatting — no account needed
Open the Haiku55 homepage or the full-screen chat and type your question. Guests get a few free messages every day in Fast mode, which uses Haiku 5.5's lowest effort level for quick answers.
Step 2: Sign in for free daily credits
Creating a free account unlocks much more:
- Free credits every day — they refresh at 00:00 UTC
- Web search with sources — answers based on current information, with numbered citations
- Link reading — paste a URL and Haiku 5.5 reads the page or PDF for you
- Smart and Deep modes — more thinking for harder questions
- Saved conversations — pick up any chat where you left off
Step 3: Pick the right mode
| Mode | Haiku 5.5 effort | Best for |
|---|---|---|
| Fast | low | Everyday questions, rewriting, quick facts |
| Smart | medium | Most tasks: explanations, planning, code |
| Deep | high | Math, tricky reasoning, long multi-step tasks |
Each answer is billed by actual usage, so Fast mode stretches your free credits furthest. Open Thought process above any answer to see how Haiku 5.5 reasoned.
Step 4: Turn on Search for anything current
Haiku 5.5's training data ends well before today. For news, prices, versions or anything "latest", switch on Search. The agent will look things up, read the most relevant pages and list its sources under the answer so you can check them.
Tips for better answers
- Give context. Say who the answer is for and what format you want ("a 5-bullet summary for a beginner").
- Paste the source. Long documents fit easily — Haiku 5.5 has a 1M-token context window.
- Share links. "Summarize https://…" makes the agent read that exact page.
- Iterate. Ask follow-ups like "shorter", "add an example" or "translate to Spanish".
How much does it cost after the free credits?
Most short messages cost 1 credit and each web search about 10 credits. If you need more than the free daily credits, see the pricing page for monthly plans and one-time credit packs.
Ready? Start chatting with Haiku 5.5.
Haiku55 is an independent service and is not affiliated with Anthropic. Claude and Haiku are trademarks of Anthropic, PBC.