Anthropic · Conversation

Claude Opus 5 API

Claude Opus 5 belongs to Anthropic’s top-tier Opus line, which the developer intends for the most demanding work: large code changes, long reasoning chains, multi-step agent runs. It costs more than Sonnet and Haiku, so it is usually reserved for tasks the smaller models cannot handle. It accepts images as input.

Model ID: anthropic/claude-opus-5
Developer: Anthropic
Type: Conversation
Context: 1,000,000 tokens
Capabilities: Image input

Claude Opus 5 pricing

Billed for	Price
Input tokens, per 1M	$0.47
Output tokens, per 1M	$2.64
Cached input, per 1M	$0.02
Typical request: 2,000 input and 500 output tokens	$0.0022

Accounting inside the service is in USD; EUR prices are recalculated at the current rate and may change.

Claude Opus 5 request example

Use https://evrona.ru/v1 as the base URL and pass anthropic/claude-opus-5 in the model field. You create the key in your account after signing up.

curl request

curl

curl https://evrona.ru/v1/chat/completions \
  -H "Authorization: Bearer ev-YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-opus-5",
    "messages": [
      {
        "role": "user",
        "content": "Hi! Tell me about yourself in two sentences."
      }
    ]
  }'

Python with the official OpenAI SDK

Python

from openai import OpenAI

client = OpenAI(
    base_url="https://evrona.ru/v1",
    api_key="ev-YOUR_KEY",
)

completion = client.chat.completions.create(
    model="anthropic/claude-opus-5",
    messages=[
        {
            "role": "user",
            "content": "Hi! Tell me about yourself in two sentences."
        }
    ],
)
print(completion.choices[0].message.content)

Claude Code and Anthropic-protocol clients

Clients that speak the Anthropic protocol take the address without /v1: ANTHROPIC_BASE_URL=https://evrona.ru. The model ID stays the same.

macOS / Linux

export ANTHROPIC_BASE_URL=https://evrona.ru
export ANTHROPIC_AUTH_TOKEN=ev-YOUR_KEY
export ANTHROPIC_MODEL=anthropic/claude-opus-5
claude

Where to use Claude Opus 5

Step-by-step guides for tools where you can pick this model:

Start using Claude Opus 5 with Evrona

Sign up, top up your balance and create a key. The same key works for Claude Opus 5 and every other model in the catalog.

All models in the catalog