How much does Claude Opus 4 cost?

Claude Opus 4 is billed pay-as-you-go at $51.42 per 1M input tokens and $257.04 per 1M output tokens. There is no subscription — you only pay for what you use.

What can Claude Opus 4 do?

Claude Opus 4 supports Reasoning.

Is Claude Opus 4 free to use?

Claude Opus 4 is a paid, pay-as-you-go model — no subscription, you are only charged for usage.

How do I use Claude Opus 4 via the API?

Claude Opus 4 is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID claude-opus-4 with your Api.Airforce API key.

Who makes Claude Opus 4?

Claude Opus 4 is Anthropic's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

AnthropicPaidOperational

Claude Opus 4

API model name: claude-opus-4

Claude Opus 4 is Anthropic's chat model, served on the Api.Airforce unified API. Capabilities include Reasoning. It is priced at $51.42 per million input tokens and $257.04 per million output tokens. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.

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Pricing

Input / 1M tokens

$51.42

Output / 1M tokens

$257.04

Cache read / 1M tokens

$5.13

Specifications

Provider: Anthropic
Type: chat model

Capabilities

Reasoning

What is Claude Opus 4 used for?

Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.
Complex reasoning — math, coding and step-by-step problem solving.

Claude Opus 4 vs. similar models

Model	Intelligence	Context	Input / 1M	Output / 1M
Claude Opus 4	—	—	$51.42	$257.04
Claude Fable 5	—	—	$7.00	$35.00
Claude Haiku 4.5	—	200K	$0.50	$2.50
Claude Opus 4.1	—	—	$8.31	$41.55

Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.

Claude Opus 4 — frequently asked questions

How much does Claude Opus 4 cost?: Claude Opus 4 is billed pay-as-you-go at $51.42 per 1M input tokens and $257.04 per 1M output tokens. There is no subscription — you only pay for what you use.
What can Claude Opus 4 do?: Claude Opus 4 supports Reasoning.
Is Claude Opus 4 free to use?: Claude Opus 4 is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use Claude Opus 4 via the API?: Claude Opus 4 is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID claude-opus-4 with your Api.Airforce API key.
Who makes Claude Opus 4?: Claude Opus 4 is Anthropic's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

All models·Quickstart·Chat API reference

Use Claude Opus 4 via the API

OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass claude-opus-4 as the model.

cURL

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer $AIRFORCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-opus-4",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

Python

from openai import OpenAI
client = OpenAI(base_url="https://api.airforce/v1", api_key="$AIRFORCE_API_KEY")
r = client.chat.completions.create(
    model="claude-opus-4",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(r.choices[0].message.content)

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.airforce/v1", apiKey: process.env.AIRFORCE_API_KEY });
const r = await client.chat.completions.create({
  model: "claude-opus-4",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);