A Together AI API alternative with one key for 50+ models

What is Together AI?

Together AI is a cloud platform for running and fine-tuning open-source models through an API.

What developers use it for

• Serving open-source models
• Fine-tuning and dedicated deployments

Things to consider

• Focused on open models; closed models like Claude are not part of its catalogue.
• Pricing varies by model and deployment type — see Together AI's pricing page.

Where Somnus fits

Somnus is simpler if you don't need fine-tuning: prepaid credit, no subscription, and closed plus open models on one key.

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 Together AI: 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 Together AI's OpenAI-compatible endpoint, only base_url, the key and the model name change.

Questions

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