OpenAI Language

GPT-3.5 Turbo 16K

Legacy GPT-3.5 with 16K context

16K Context window

Text Modalities

General Specialty

Yes Streaming

Get API key — free View docs →

Model ID gpt-3.5-turbo-16k /v1/chat/completions

Our pricing

Input tokens per 1M tok

$2.40

Output tokens per 1M tok

$7.20

Pay-as-you-go · No minimums · Cancel anytime

OpenAI-compatible ( api.belugapi.com/v1)

Start for free →

No credit card required to test

Capabilities

What GPT-3.5 Turbo 16K
can do for you.

Native API parity with the official provider — every feature surfaced one-to-one.

Streaming

Server-sent events out of the box

Integration

2-line migration.
Zero friction.

BelugAPI is 100 % compatible with the OpenAI SDK. Point base_url to our endpoint and you're done — no refactoring, no learning curve.

Same request & response schema

Python · Node.js · REST · Go · Ruby

Streaming, tool-calling, structured output

Automatic failover & load balancing

Python

from openai import OpenAI

client = OpenAI(
  api_key=bel-your-key,
  base_url=https://api.belugapi.com/v1
)

response = client.chat.completions.create(
  model=gpt-3.5-turbo-16k,
  messages=[{"role": user, "content": Hello!}]
)
print(response.choices[0].message.content)

Node.js

import OpenAI from openai;

const client = new OpenAI({
  apiKey:  bel-your-key,
  baseURL: https://api.belugapi.com/v1,
});

const res = await client.chat.completions.create({
  model:    gpt-3.5-turbo-16k,
  messages: [{ role: user, content: Hello! }],
});
console.log(res.choices[0].message.content);

cURL

curl https://api.belugapi.com/v1/v1/chat/completions \
  -H Authorization: Bearer bel-your-key \
  -H Content-Type: application/json \
  -d {"model":"gpt-3.5-turbo-16k","messages":[{"role":"user","content":"Hello!"}]}

Highlights

Built for production.

Legacy

16K context

Complete guide

Everything about
GPT-3.5 Turbo 16K.

Specifications, pricing, capabilities, and integration tips — kept up to date with every OpenAI release.

By OpenAI 2 min read Updated May 2026

Legacy GPT-3.5 with 16K context

Overview

GPT-3.5 Turbo 16K is a cutting-edge large language model (llm) developed by OpenAI, designed to push the boundaries of artificial intelligence-powered content generation.

This model excels in legacy, 16K context, making it a top choice for professionals seeking high-quality, scalable AI solutions. Whether you're building production applications, researching new AI capabilities, or creating stunning visual content, GPT-3.5 Turbo 16K delivers industry-leading performance and reliability.

Key Specifications

Specification	Details
Model Name	GPT-3.5 Turbo 16K
Provider	OpenAI
Category	Large Language Model (LLM)
Model Type	Chat
Context Window	16K

Pricing

Input: $2.4/M tokens
Output: $7.2/M tokens

Key Features & Capabilities

Legacy: Advanced capability for professional-grade output.
16K Context: Advanced capability for professional-grade output.

Use Cases & Applications

Customer support chatbots
Content creation and writing assistants
Knowledge base Q&A systems
Educational tutoring platforms

Frequently asked questions

What is GPT-3.5 Turbo 16K best used for?

GPT-3.5 Turbo 16K excels at legacy, 16K context, making it ideal for professional and enterprise applications.

Who developed GPT-3.5 Turbo 16K?

GPT-3.5 Turbo 16K was developed by OpenAI, a leading AI research and development company.

How do I integrate GPT-3.5 Turbo 16K into my application?

You can integrate GPT-3.5 Turbo 16K via its official API endpoint using standard HTTP requests with your API key. SDKs are available for Python, JavaScript, and other languages.

What is the pricing model for GPT-3.5 Turbo 16K?

Pricing is based on input. Check the pricing section above for detailed rates.

Ready to ship? Start using GPT-3.5 Turbo 16K in under 30 seconds.

Get free API key