A DeepSeek API API alternative with one key for 50+ models

What is DeepSeek API?

DeepSeek provides its own models through the DeepSeek API, which uses an OpenAI-compatible format.

What developers use it for

• Low-cost reasoning and coding workloads on DeepSeek models

Things to consider

• Only DeepSeek's models are available.
• Check DeepSeek's pricing docs for current rates.

Where Somnus fits

Somnus includes DeepSeek models with the other makers', so you can fall back to Claude or GPT without another account.

Every Somnus top-up is credited at 2× or more, and usage is billed at each model's list price, so a dollar of credit buys at least two dollars of usage.

Switching from DeepSeek API: change two settings

from openai import OpenAI
import os

client = OpenAI(
    api_key=os.environ["SOMNUS_API_KEY"],
    base_url="https://gateway-production-c837.up.railway.app/v1",
)

resp = client.chat.completions.create(
    model="claude-sonnet-5",
    messages=[
      {"role": "user", "content": "Hello"}
    ],
)
print(resp.choices[0].message.content)

If you already use DeepSeek API's OpenAI-compatible endpoint, only base_url, the key and the model name change.

Questions

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