Using Claude 4 Opus on Anthropic

Implementation guide · Claude 4 · Anthropic

Serverless

Anthropic exposes Claude 4 Opus through model ID claude-opus-4-20250514. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-07-26. Next refresh: weekly.

Quick Start

1
Create an account at Anthropic and generate an API key.
2
Use the Anthropic SDK or REST API to call claude-opus-4-20250514 — see the documentation for request format.
3
You'll be billed $15.00/1M input, $75.00/1M output tokens. See full pricing.

API Portal Documentation Pricing

Code Examples

Install

pip install anthropic

API key

ANTHROPIC_API_KEY

Model ID

claude-opus-4-20250514

Use the versioned model ID, e.g. "claude-sonnet-4-6" or "claude-opus-4-7-20251101".

import anthropic

client = anthropic.Anthropic()  # reads ANTHROPIC_API_KEY from env
message = client.messages.create(
    model="claude-opus-4-20250514",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}]
)
print(message.content[0].text)

Pricing on Anthropic

Type	Price (per 1M)
Input tokens	$15.00
Output tokens	$75.00

Capabilities

VisionMultimodalJSON / Tool useStructured OutputsFine-tuning

About Claude 4 Opus

Anthropic Claude 4 Opus API snapshot (claude-opus-4-20250514), deprecated April 14, 2026 with Claude API retirement scheduled for June 15, 2026. Use Claude Opus 4.8 for current integrations.

Full model details →

Model Specs

Released2025-05-14

Context200k

Knowledge cutoff2025-04

San Francisco, California, United States