Claude Opus 5

Opus 5 was Anthropic’s top everyday model from July to September 2026, when Opus 5.5 replaced it. At launch Anthropic’s headline was agent work: on Zapier’s AutomationBench it passed about one and a half times as many tasks as the next-best model at the same cost per task.

Unlike Opus 5.5, its thinking is optional, so it can give a quick answer without reasoning first. That, and stability, are the reasons to stay on it: if a product was tuned on Opus 5, keep it there until you have tested the move.

For scale: 1,000 requests of about 3,000 tokens in and 1,000 out cost $46.00 — a long prompt and a page of answer each. Every rate is published and stays the same from one request to the next. See every model.

Claude Opus 5 is billed in rupees, on the same monthly invoice as every other model your team uses — no foreign card, no separate Anthropic account, and one key for all of it.

Prompts sent to Claude Opus 5 are processed outside Sri Lanka. If a workload has to stay in the country, Qwen3.8-27B (Colombo) runs on our own servers in Colombo.

Use the OpenAI SDK you already have — point it at Roar AI and name the model. Read the docs.

from openai import OpenAI

client = OpenAI(base_url="https://api.roar-ai.com/v1", api_key="roar_live_…")

reply = client.chat.completions.create(
    model="claude-opus-5",
    messages=[{"role": "user", "content": "Summarise this contract in plain English."}],
)