Claude Haiku 5.5 API pricing

Price comparison

Cloudflare's list price is what the provider charges through Cloudflare; one-api.ai is what a call debits here. Anthropic pricing lists $0.10 input, $0.01 cached input and $0.50 output per 1M tokens for the standard tier.

Prompts up to 100,000 tokens, per 1M

Prompts over 100,000 tokens, per 1M

Sources: Cloudflare model page, checked 2026-10-22; Anthropic pricing, checked 2026-10-31.

What a month costs

Three example workloads. "Monthly cost" multiplies the tokens by the one-api.ai price per 1M, and that is what billing debits: usage is metered to a millionth of a credit, with no rounding up per call. A credit is a tenth of a cent.

Prompts that reuse a long prefix can cost less where the model has a cached-input rate, shown in the price comparison above.

Context and cache tiers

Cloudflare model page lists a context window of 1,000,000 tokens. Prompts of 100,001 tokens or more, counting cached tokens, are billed at the long-context tier for the whole request. Cached input is billed at the cached rate only when the provider reports a cache hit; the cost examples above assume no cache hits. one-api.ai sets max_tokens to 4,096 when a request leaves it out and clamps it to 16,384.

Request examples

Python

import os
from openai import OpenAI

client = OpenAI(base_url="https://one-api.ai/v1/launch", api_key=os.environ["ONE_API_TOKEN"])
resp = client.chat.completions.create(
    model="anthropic/claude-haiku-5.5",
    messages=[{"role": "user", "content": "Summarise RDAP in one sentence."}],
    max_tokens=512,
)
print(resp.choices[0].message.content)
print(resp.usage)

JavaScript

import OpenAI from "openai";

const client = new OpenAI({ baseURL: "https://one-api.ai/v1/launch", apiKey: process.env.ONE_API_TOKEN });
const resp = await client.chat.completions.create({
  model: "anthropic/claude-haiku-5.5",
  messages: [{ role: "user", content: "Summarise RDAP in one sentence." }],
  max_tokens: 512,
});
console.log(resp.choices[0].message.content, resp.usage);

curl

curl https://one-api.ai/v1/launch/chat/completions \
  -H "Authorization: Bearer $ONE_API_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"model":"anthropic/claude-haiku-5.5","messages":[{"role":"user","content":"Say hello in one sentence."}],"max_tokens":512}'

Notes on Claude Haiku 5.5

This page is information only. Claude Haiku 5.5 is not part of one-api.ai early access, and we do not sell access to it today. The rates below are what the endpoint is configured to debit and are published for comparison.

Anthropic prices Haiku 5.5 by prompt length: a request whose prompt is over 100,000 tokens pays the higher tier for every token in that request, and the prompt length counts cache reads and cache writes. one-api.ai applies the same threshold.

Cache writes cost 1.25 times plain input on the five-minute cache, and cache reads one tenth, on both tiers. A long system prompt reused across calls is where Haiku's cache pays off most.

Cloudflare's model page lists a 1,000,000 token context window. Anthropic's own list price matched Cloudflare's on the day we checked.

FAQ

Can I buy Claude Haiku 5.5 access from one-api.ai?

Not today. The page documents prices only. Early access covers the DeepSeek and GLM models and the four lookups.

Where does the 100,000 token threshold come from?

Anthropic's pricing page: prompts over 100,000 tokens, including cache reads and writes, pay the long-context rates.

Is the request format Anthropic Messages?

one-api.ai accepts the OpenAI chat completions shape on its endpoint and forwards it through Cloudflare. Anthropic-specific fields may not pass through.

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