OpenAI: GPT-3.5 Turbo 16k

OpenAIID: openai/gpt-3.5-turbo-16k

This model offers four times the context length of gpt-3.5-turbo, allowing it to support approximately 20 pages of text in a single request at a higher cost. Training data: up to Sep 2021.

Pricing per 1M Tokens

Input (Prompt)$3.00
Output (Completion)$4.00
Cache ReadFree
Cache WriteFree
ImageN/A

Specifications

Context Length16K
Max Output Tokens4K
Input ModalitiesText
Output ModalitiesText
TokenizerGPT
Instruct TypeN/A
Top Provider Context16K
Top Provider Max Output4K
ModeratedYes

Compare this model

See how OpenAI: GPT-3.5 Turbo 16k stacks up against other models.

vs OpenAI: GPT-5.4 Nanovs OpenAI: GPT-5.4 Minivs OpenAI: GPT-5.4 Provs OpenAI: GPT-5.4vs OpenAI: GPT-5.3 Chat

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Last updated: March 23, 2026

First tracked: March 23, 2026