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OpenAI: GPT-3.5 Turbo (older v0613)

openai chat
openai/gpt-3.5-turbo-0613

GPT-3.5 Turbo is OpenAI's fastest model. It can understand and generate natural language or code, and is optimized for chat and traditional completion tasks. Training data up to Sep 2021.

Try in Playground API Docs
At a glance

Model specifications

The most important technical and pricing details in one place.

Context window
4.1K tokens
Model type
Chat
Input / 1M
$1.00
Output / 1M
$2.00

Providers and routing order

Gateway-compatible routes are tried from the lowest cost; other sources are shown for catalog reference.

1 source
1
OpenRouterGateway activeopenai/gpt-3.5-turbo-0613 · Updated 05.10.2026 20:17
Input$1.0000 / 1M Output$2.0000 / 1M Cache$0.0000 / 1M Media-
Live telemetry

Usage and performance

Current request, token, and latency data across TamgaStudio.

Usage Example

Call OpenAI: GPT-3.5 Turbo (older v0613) with a single request through the OpenAI-compatible TamgaStudio API. Create your API key from the API Keys section in your dashboard.

curl https://api.tamga.studio/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer tl-sk-XXXXXX" \
  -d '{"model": "openai/gpt-3.5-turbo-0613", "messages": [{"role": "user", "content": "Hello!"}]}'
import requests

resp = requests.post(
    "https://api.tamga.studio/v1/chat/completions",
    headers={"Authorization": "Bearer tl-sk-XXXXXX"},
    json={
        "model": "openai/gpt-3.5-turbo-0613",
        "messages": [{"role": "user", "content": "Hello!"}],
    },
)
print(resp.json()["choices"][0]["message"]["content"])
<?php
$ch = curl_init('https://api.tamga.studio/v1/chat/completions');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer tl-sk-XXXXXX',
        'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS => json_encode([
        'model' => 'openai/gpt-3.5-turbo-0613',
        'messages' => [['role' => 'user', 'content' => 'Hello!']],
    ]),
    CURLOPT_RETURNTRANSFER => true,
]);
echo curl_exec($ch);

Frequently Asked Questions

Common questions about this model.

What is OpenAI: GPT-3.5 Turbo (older v0613)?
GPT-3.5 Turbo is OpenAI's fastest model. It can understand and generate natural language or code, and is optimized for chat and traditional completion tasks. Training data up to Sep 2021. It is accessible through a single OpenAI-compatible API via TamgaStudio.
How much does OpenAI: GPT-3.5 Turbo (older v0613) cost?
Pricing is $1.00 per 1M input tokens and $2.00 per 1M output tokens. Billing is credit-based: you only pay for what you use.
What is the context length of OpenAI: GPT-3.5 Turbo (older v0613)?
OpenAI: GPT-3.5 Turbo (older v0613) supports a context of up to 4,095 tokens in one request.
Can I use OpenAI: GPT-3.5 Turbo (older v0613) with the OpenAI SDK?
Yes. TamgaStudio exposes all models through an OpenAI-compatible endpoint: https://api.tamga.studio/v1/chat/completions. Just swap the base URL and API key in your existing OpenAI code.
How do I get an API key?
After signing in, create a key from the "API Keys" section of your dashboard. The key is shown only once and is stored as a SHA-256 hash.