> GPT-3.5 Turbo (Jan 2024) is a closed AI model from OpenAI, released 25 Jan 2024. Index score 87 (GPT-4 = 100), rank 211 of 229 ranked models.

[Models](https://themodelindex.org/models/) /[OpenAI](https://themodelindex.org/labs/openai/)

# GPT-3.5 Turbo (Jan 2024)

OpenAI

Released 25 Jan 2024

Closed

[Compare](https://themodelindex.org/compare/gpt-3-5-turbo-jan-2024-vs-mixtral-8x7b/)

8773–101

Index score

#211 of 229 models

2/ 8

Core tests taken

2 of 6 areas · plus 8 anchor tests

−18

Versus the frontier at release

best then: GPT-4 Turbo

Replaced by [GPT-4 Turbo (Apr 2024)](https://themodelindex.org/models/gpt-4-turbo-apr-2024/)

–

Price per million tokens

no public API price found

–

Context window

tokens it reads at once

## Where it sits · on the frontier

_Chart: Model Index score of every scored model since late 2022, with the best closed and best open model over time_

GPT-4 reached this score 10 months earlier.

## Test results · by area · tick = best by any model

Show 8 anchor tests

Reasoning & knowledge

evidence

GPQA Diamond

27%

Humanity's Last Exam

no result

Maths

evidence

FrontierMath T1-3

0%

Coding

evidence

SWE-bench Verified

no result

Terminal-Bench

no result

Agents

evidence

APEX-Agents

no result

Novel problems

no evidence yet

ARC-AGI-2

no result

Long tasks

no evidence yet

METR time horizon

no result

Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above.

## What others say · rank on each leaderboard

The Model Index

independent tests, our method

#211

of 219 · 87

Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source.

## Best at · top three among current models

Replaced by GPT-4 Turbo (Apr 2024); it no longer leads any category among current models.

Where this model places in the top three of today's models, on category leaderboards and on our core tests.

## Where to use it · prices checked 1 Oct 2026

#### From the lab

ChatGPT

app · subscription

↗

OpenAI API

API

↗

Provider prices come from OpenRouter's live listing; going direct to a provider can differ. Subscriptions are the lab's own apps.

## Facts and sources

Released

25 Jan 2024

Announcement

not linked yet

Release entry

–

Scored as

GPT-3.5 Turbo (Jan 2024)

Artificial Analysis index

–

Output speed

–

Hugging Face

closed weights

## OpenAI releases · around this one

ChatGPT

Closed

30 NOV 2022

GPT-4

Closed

14 MAR 2023

index 100

---
Source: https://themodelindex.org/models/gpt-3-5-turbo-jan-2024/ · The Model Index · data as of 2026-10-01