Claude Haiku 4
Access Claude Haiku 4 through one API key. Anthropic's fastest model for high-volume tasks.
Anthropic's fastest and most affordable model. Ideal for high-volume tasks, quick responses, and cost-sensitive applications.
No credit card required. Takes 30 seconds.
2,400+
Developers
1.2M+
API calls served
100+
Endpoints
$0.01
Per call
Yep, that's it.
Try it live
Send a message and see Claude Haiku 4 respond in real time.
Maximum tokens in the response.
Real-time tokens
Context Window
200K tokens
Max Output
8K tokens
Input Price
$1.12 / 1M tokens
Output Price
$5.60 / 1M tokens
Strengths
Haiku is the lowest-latency Claude, built for snappy responses in interactive apps and tight real-time loops.
At $1.12 per 1M input and $5.60 per 1M output tokens, it's the cheapest way to get Claude-quality output for high-volume work.
Fast generation and low cost make it suited to processing large batches of requests where per-call expense compounds.
Shares the full 200K-token context of larger Claude models, so it can read long documents despite being the speed-tier option.
Quick start
Copy this snippet and start making calls with Claude Haiku 4.
const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"model": "anthropic/claude-haiku-4",
"messages": [
{
"role": "user",
"content": "Explain API gateways in 2 sentences."
}
],
"maxTokens": 256
}),
});
const { data } = await res.json();
console.log(data.message.content);Why use Claude Haiku 4 through YepAPI?
Claude Haiku 4 API — pricing, context window & access
Claude Haiku 4 is Anthropic's fastest and most affordable model, built for high-volume, latency-sensitive work. It keeps the family's 200K-token context window and returns up to 8,192 output tokens per response.
With YepAPI you reach Claude Haiku 4 through one OpenAI-compatible key — the same key that also covers Claude Sonnet and Opus, GPT-4o, Gemini, and the SEO, SERP and scraping APIs.
What is Claude Haiku 4?
Claude Haiku 4 is the speed-and-cost tier of Anthropic's Claude family, sitting below Sonnet and Opus. It's engineered to be the fastest Claude and the most affordable, aimed at high-volume tasks, quick responses, and cost-sensitive applications. What sets it apart from typical 'small' models is that it keeps the full 200K-token context window of its larger siblings — so it can still read long documents while answering quickly and cheaply. It's the model you choose when you want Claude's reliability at the scale of millions of requests.
Build with Claude Haiku 4 via YepAPI
YepAPI serves Claude Haiku 4 on the OpenAI-compatible /v1/ai/chat endpoint. Use the chat-completions format you already know and set the model string to claude-haiku-4 — no Anthropic SDK needed. Upgrading to Claude Sonnet or Opus for harder requests, or swapping to GPT-4o Mini, is one string. The same key also reaches search and scraping endpoints, so a high-volume Haiku pipeline and your data-gathering jobs run on a single account.
Claude Haiku 4 API pricing — $1.12 / 1M input, $5.60 / 1M output
Claude Haiku 4 costs $1.12 per 1M input tokens and $5.60 per 1M output tokens through YepAPI — the cheapest entry point into the Claude family. That pricing makes it practical for jobs measured in millions of tokens: summarizing records, classifying tickets, or powering chat at scale. Because it shares the 200K context window, you can still pass long inputs cheaply. You pay only for tokens used, with no minimums or commitments.
Claude Haiku 4 for high-throughput tasks
Haiku 4 is built for volume. Its low latency keeps interactive apps responsive, while its low price lets you run it across large batches without runaway cost. Use it for extraction, classification, routing, and first-pass summarization — then escalate only the hard cases to Sonnet or Opus. The shared 200K context means even at the speed tier you can hand it long documents, so high-throughput pipelines don't have to sacrifice input length.
Try Claude Haiku 4 free
Every new YepAPI account includes $5 in free credit with no card required. At Haiku's low rates, that covers a lot of real high-volume testing before you commit. Sign up, copy your key, and start calling Claude Haiku 4 right away.
Start generating in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
Anthropic's fastest and most affordable model. Ideal for high-volume tasks, quick responses, and cost-sensitive applications.
Input tokens cost $1.12 per 1M tokens and output tokens cost $5.60 per 1M tokens through YepAPI. No monthly minimums — you only pay for what you use.
Sign up for a free API key, then send requests to the /v1/ai/chat endpoint.
Claude Haiku 4 supports a 200K token context window with up to 8K output tokens per request.
Ready to use Claude Haiku 4?
$5 free credit on signup. No credit card required. Pay per call.
Explore more models
Claude Sonnet 4
AnthropicAccess Claude Sonnet 4 through one API key. Anthropic's best balance of speed and intelligence.
Claude Opus 4.8
AnthropicAccess Claude Opus 4.8 through one API key. Anthropic's newest and most intelligent model.
Claude Opus 4.8 Fast
AnthropicAccess Claude Opus 4.8 Fast through one API key. Flagship intelligence with low-latency output.