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GPT

GPT chat models are called through one simple endpoint: send a messages array plus the model slug and get the reply text back. This family exposes 5 models.

Overview

Send a standard messages array (user / assistant / system roles). Billing is deducted from your credit balance per response; the response includes your remaining balance.

Authentication

Create an API key at /api-keys, then send it as a Bearer token. Requests from the browser while logged in also work via the session cookie.

Authorization: Bearer <YOUR_API_KEY>

OpenAI-compatible Chat Completions

POST
POST https://api.lithovas.com/v1/chat/completions

Use this endpoint for developer integrations: point your OpenAI SDK base_url to https://api.lithovas.com/v1 and send a Lithovas API key.

Python SDK
Python
from openai import OpenAI

client = OpenAI(
    api_key="YOUR_LITHOVAS_API_KEY",
    base_url="https://api.lithovas.com/v1",
)

completion = client.chat.completions.create(
    model="chat/gpt-5-6-terra",
    messages=[
        {"role": "system", "content": "You are a helpful assistant."},
        {"role": "user", "content": "Hello!"},
    ],
)

print(completion.choices[0].message.content)
cURL
cURL
curl -X POST https://api.lithovas.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "chat/gpt-5-6-terra",
    "messages": [
      { "role": "system", "content": "You are a helpful assistant." },
      { "role": "user", "content": "Hello!" }
    ]
  }'

Chat Completions

POST
POST https://api.lithovas.com/api/chat

Body: { "model": "<slug>", "messages": [{ "role": "user", "content": "…" }] }

Response: { "text": "<assistant reply>", "credits": <billed>, "balance": <remaining> }

Models

ModelProvidermodel slug
GPT-5.6 TerraOpenAIchat/gpt-5-6-terra
GPT-5.6 SolOpenAIchat/gpt-5-6-sol
GPT-5.6 LunaOpenAIchat/gpt-5-6-luna
GPT-5.5OpenAIchat/gpt-5-5
GPT-5.4OpenAIchat/gpt-5-4

GPT-5.6 Terra

POST/v1/chat/completions
cURL
curl -X POST https://api.lithovas.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "chat/gpt-5-6-terra",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

GPT-5.6 Sol

POST/v1/chat/completions
cURL
curl -X POST https://api.lithovas.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "chat/gpt-5-6-sol",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

GPT-5.6 Luna

POST/v1/chat/completions
cURL
curl -X POST https://api.lithovas.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "chat/gpt-5-6-luna",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

GPT-5.5

POST/v1/chat/completions
cURL
curl -X POST https://api.lithovas.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "chat/gpt-5-5",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

GPT-5.4

POST/v1/chat/completions
cURL
curl -X POST https://api.lithovas.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "chat/gpt-5-4",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'