Using GPT-3.5 Turbo 16k on OpenRouter

Implementation guide · GPT-3.5 · OpenAI

Serverless

OpenRouter exposes GPT-3.5 Turbo 16k through model ID openai/gpt-3.5-turbo-16k. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-06-15. Next refresh: weekly.

Quick Start

  1. 1
    Create an account at OpenRouter and generate an API key.
  2. 2
    Use the OpenRouter SDK or REST API to call openai/gpt-3.5-turbo-16k — see the documentation for request format.
  3. 3
    You'll be billed $3.00/1M input, $4.00/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

TypePrice (per 1M)
Input tokens$3.00
Output tokens$4.00

Capabilities

Structured Outputs

About GPT-3.5 Turbo 16k

GPT-3.5 Turbo 16k, developed by OpenAI, is an advanced language model featuring a significantly enhanced context window of 16,384 tokens—four times larger than its predecessor's 4,096 tokens 245. This extension allows it to process and comprehend extended texts, up to approximately 20 pages, in a single interaction, while maintaining the speed and efficiency of earlier versions 10. Although it is a chat-centric model not compatible with the completions endpoint 8, it remains highly effective for tasks requiring prolonged relevance and coherence through OpenAI's API 46.

Full model details →

Model Specs

Released2023-06-13
Parameters20B
Context16k
ArchitectureDecoder Only
Knowledge cutoff2021-09

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Also available on(2)

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Provider

OpenRouter

OpenRouter, Inc.

New York, NY, USA