Claude Haiku 4.5 - AI Model API and Pricing

Jobs where Haiku pays off

Haiku writes fast, natural sentences, so it shines when you need many short pieces with a human rhythm. Think ten headline options for a landing page, or caption sets for a week of posts. It also handles product descriptions for a new collection. The words come out clean enough to paste, and the low rate makes iteration cheap.

It is less suited to long, argued pieces. The listed limit is a shorter reach than the Pro models. Once an article runs long, that shows up as thinner structure and repetition.

Which preset to open in the AI Article Generator

Haiku runs in the AI Article Generator, which has no uploads, so paste any brief into the prompt. Use Ad copy for variants and Product description for catalog entries. Newsletter fits a short weekly email, and Video script suits a tight voiceover. Blog post works for short pieces. For SEO article, keep the scope modest or switch models.

Prompts that suit it: "Write 8 headline variants for a reusable water bottle aimed at cyclists. Under 60 characters each, no exclamation marks." Or "Three Instagram captions for a bakery's new sourdough, warm and plain, one with a question."

Keeping output tight

The engine reads only your prompt, and the tool fixes the response cap. The length you request is what stops a caption request from growing into an essay you pay for. Give a word or character limit in the prompt, name the audience, and list words to avoid. Ask for numbered variants so you can pick quickly.

What it costs per piece

An 800-word blog post rounds up to 1k words and costs 8 credits, about $0.09 at the best pack. A 2,000-word article is 16 credits, about $0.17. Among 10 text models it ranks No. 6 from the cheapest, inside a range of 1 to 47 credits per 1k words.

Cheaper or different options

Gemini 3 Flash costs 5 credits per 1k words and suits high-volume descriptions where short texts are the norm. GLM-5, at 6 credits, is the pick for copy aimed at Asian markets and working translations. DeepSeek V4 lists 2 credits and handles long, argued articles, but its style can read as technical.

Where to actually run it

Claude Haiku 4.5 API

curl -X POST https://ugesi.com/api/generate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-haiku-4-5",
    "prompt": "a product shot on white marble"
  }'

<?php
$ch = curl_init('https://ugesi.com/api/generate');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer YOUR_API_KEY',
        'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS => json_encode([
        'model' => 'claude-haiku-4-5',
        'prompt' => 'a product shot on white marble',
    ]),
]);
$response = json_decode(curl_exec($ch), true);
curl_close($ch);
print_r($response);

type GenerateRequest = {
  model: string;
  prompt: string;
};
type GenerateResponse = {
  job_id: number;
  job_token: string;
  credits_held: number;
  status: "queued" | "succeeded";
  output_text?: string;
};

const body: GenerateRequest = {
  model: "claude-haiku-4-5",
  prompt: "a product shot on white marble",
};

const resp = await fetch("https://ugesi.com/api/generate", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.UGESI_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify(body),
});
if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
const job = (await resp.json()) as GenerateResponse;
console.log(job.job_id, job.status);

import requests

resp = requests.post(
    "https://ugesi.com/api/generate",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={
        "model": "claude-haiku-4-5",
        "prompt": "a product shot on white marble",
    },
    timeout=60,
)
resp.raise_for_status()
print(resp.json())

{
  "model": "claude-haiku-4-5",
  "prompt": "a product shot on white marble"
}

The API comes with every credit pack, from Lite to Enterprise, and uses the same balance as the website. API documentation and access →

License and terms of use

Outputs made with paid credits can be used commercially. The maker's own rules for Claude Haiku 4.5 also apply (Anthropic Usage Policy). The full rules are in our Terms of service.

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