The same Claude Opus 4, from $10/month

Same Anthropic upstream, same quality — plans from $10/month include every frontier model, with monthly usage worth up to 4.5× the price. Change one line of base_url and your existing OpenAI SDK just works. Try it below, sign in when you are ready.

Best for long-context reasoning, coding agents, and production assistants

# Your existing OpenAI code:
from openai import OpenAI

client = OpenAI(
  base_url="https://router.flatkey.ai/v1",
  api_key="sk-flatkey-...",
)
response = client.chat.completions.create(
  model="claude-opus-4",
  messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)