Use Claude Haiku 5.5 to classify messages, extract structured records, and draft replies from your instructions. Test your own workflow on reAPI.
Start with the prompt in the composer or choose an example.
Credit-based — 1 credit = $0.001 USD. Pay only for completed generations.
30% off official pricing· Input / output tokens
One 1K-token prompt with a 1K-token answer at the cheapest tier.
Claude Haiku 5.5 is an Anthropic language model for everyday tasks. It takes text and images, supports up to one million tokens of context, and returns text or structured results. Use Claude Haiku 5.5 to turn requests into decisions your team can review and build a repeatable workflow.
Real-world workflows and production use cases you can build and ship with this model.
Give Claude Haiku 5.5 the categories your team actually uses, together with a few examples of ambiguous requests. Ask for a category and the sentence that supports it, so someone can check the decision without reading the whole conversation. Keep an explicit review path for messages that lack enough information.
Try Claude Haiku 5.5
Ask Claude Haiku 5.5 to turn a supplier note into fields your application can use. Claude Haiku 5.5 supports structured JSON output, including explicit missing values. Check extracted names and dates against the original before saving them.
Give Claude Haiku 5.5 the policy, customer question, and preferred tone. Claude Haiku 5.5 can draft a reply explaining the next step or condense a conversation into a handoff note. Set a clear length and leave unresolved questions visible.
Start with a few requests whose correct outcomes you already know. Run Claude Haiku 5.5 in the playground, review the results, and carry those prompts into your application once they meet your requirements.
Estimate your Claude Haiku 5.5 workload using the current rates above. Keep responses concise for repeated classification and extraction, then check actual usage as you expand.
Give Claude Haiku 5.5 a tool definition with the fields your application expects. Claude Haiku 5.5 supports forced tool selection when a workflow needs that particular tool to answer.
The two models share a large context window but differ in their default effort and tool controls. Use these documented differences to choose an initial candidate, then compare the quality and cost of your own tasks.
Based on Anthropic model and migration documentation checked October 9, 2026. reAPI prices are shown separately above. These specifications are not a benchmark ranking.
Sign in, open API keys, and create a credential for your application. Keep it on your server and add funds before making paid requests.
OpenUse claude-haiku-5-5 with the Messages endpoint at https://reapi.ai/api/v1/messages. Follow the documentation example, then replace the sample question with one task you can check.
OpenCompare the answer with your expected result, including any fields that should remain unknown. Save the prompt and output requirements so future requests use the same evaluation criteria.
Opencurl --no-buffer --request POST \
--url https://reapi.ai/api/v1/messages \
--header "x-api-key: YOUR_API_KEY" \
--header "Content-Type: application/json" \
--data '{
"model": "claude-haiku-5-5",
"messages": [
{
"role": "user",
"content": "Explain this design clearly."
}
],
"max_tokens": 4096,
"output_config": {
"effort": "medium"
},
"stream": true
}'Read stop_reason and returned content, including incomplete answers or refusals. HTTP 200 alone does not verify every parameter.
Use an active reAPI key and a funded account. The docs explain request authentication and token billing.
Return the tool result with its matching ID and preserve the complete assistant content from the previous turn.
Inspect the returned error and request ID. Decide whether a retry is appropriate for that error and your application.
Common questions about this model.
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Try it in the playground or grab an API key to integrate now.
