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. It is priced at $3.21 per million input tokens and $16.08 per million output tokens. Access it through the OpenAI-compatible API with one key, alongside 65+ other models on Api.Airforce.
Pricing
Specifications
- Provider
- Anthropic
- Type
- chat model
What is Claude Opus 4 used for?
- Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.
Claude Opus 4 vs. similar models
| Model | Context | Input / 1M | Output / 1M |
|---|---|---|---|
| Claude Opus 4 | — | $3.21 | $16.08 |
| Claude 3 7 Ch Exp | 200K | Free | Free |
| Claude 4 Ch Exp | 200K | Free | Free |
| Claude Fable 5 | 1M | $7.00 | $35.00 |
Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.
Related models
Claude 3 7 Ch ExpAnthropic · FreeClaude 4 Ch ExpAnthropic · FreeClaude Fable 5Anthropic · $7.00 / 1MClaude Haiku 4.5Anthropic · $0.50 / 1MClaude Opus 4 1Anthropic · $3.21 / 1MClaude Opus 4.5Anthropic · $2.50 / 1MClaude Opus 4.5 RpAnthropic · $3.00 / 1MClaude Opus 4.6Anthropic · $2.50 / 1MClaude Opus 4.6 RpAnthropic · $2.50 / 1MClaude Opus 4.7Anthropic · $2.50 / 1MClaude Opus 4.8Anthropic · $2.50 / 1MClaude Sonnet 4 20250514Anthropic
Claude Opus 4 — frequently asked questions
- How much does Claude Opus 4 cost?
- Claude Opus 4 is billed pay-as-you-go at $3.21 per 1M input tokens and $16.08 per 1M output tokens. There is no subscription — you only pay for what you use.
- What can Claude Opus 4 do?
- Claude Opus 4 is Anthropic's chat model, accessible through the Api.Airforce API.
- 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 65+ other models.
Loading live metrics…
Loading live metrics…
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);