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.

Context
16K
Max output
4K
Input price
$3/1M tokens
Output price
$4/1M tokens

Capabilities

Reasoning & Interaction
Tool Calling
Output Control
Structured Output
JSON Mode

Details

Model IDopenai/gpt-3.5-turbo-16k
Provider OpenRouter
Creator OpenAI
Familygpt-3.5
License—
Status—
Typechat
Input modalitiestext
Output modalitiestext
Open weight—
Parameters—
Architecture—
Context window16K tokens
Max input—
Max output4K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$3
Output
$4
Cache write
—
Cache read
—
Batch in
—
Batch out
—

Family Comparison: gpt-3.5

ModelContextMax outPricing
OpenAI: GPT-3.5 Turbo (batch)16K4K$0.25$0.75
OpenAI: GPT-3.5 Turbo16K4K$0.5$1.5
OpenAI: GPT-3.5 Turbo (older v0613)4K4K$1$2
OpenAI: GPT-3.5 Turbo Instruct4K4K$1.5$2
OpenAI: GPT-3.5 Turbo 16k16K4K$3$4

API

GET/v1/models/openrouter/openai/gpt-3.5-turbo-16k

OpenAI: GPT-3.5 Turbo 16k

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.

Changes · 3 entries
openai/gpt-3.5-turbo-16kupdate1cd659eMar 24, 2026, 04:19 AM
capabilitiesjson modeyes
openai/gpt-3.5-turbo-16kupdate2b100acMar 23, 2026, 05:30 AM
model_typechat
release_date2023-08-28
taglineThis model offers four times the context length of gpt-3....
tools["function_calling"]
openai/gpt-3.5-turbo-16kcreate7f5c66fMar 21, 2026, 05:16 AM