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A technical preview of the planned Simit API.

Last updated: October 2, 2026

Beta. The endpoints are live; create your key in the API console. Details may change during the beta.

Basics

Base URLhttps://simitgpt.com/api/v1
AuthenticationAuthorization: Bearer <API_KEY>
FormatJSON compatible with OpenAI Chat Completions

Chat completions

bash
curl https://simitgpt.com/api/v1/chat/completions \
  -H "Authorization: Bearer $SIMIT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "simit-flash",
    "messages": [
      {"role": "user", "content": "What is the longest river in Türkiye?"}
    ],
    "stream": false
  }'

Python (with the OpenAI SDK)

python
from openai import OpenAI

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

stream = client.chat.completions.create(
    model="simit-flash",
    messages=[{"role": "user", "content": "Tell me a short history of Istanbul."}],
    stream=True,
)
for chunk in stream:
    print(chunk.choices[0].delta.content or "", end="")

Models

ModelDescription
simit-flashFast, economical general-purpose model; reasoning with "thinking": {"type": "enabled"}
simit-proOur strongest reasoning model

Prices and balance: API Platform. Streaming ("stream": true) uses the same SSE format as OpenAI.

Error codes

HTTPMeaning
400Invalid request
401Invalid or missing API key
413Request too large
429Rate limit exceeded. Honour the Retry-After header
5xxTemporary server error. Retry with exponential backoff

Get a key: API Console