o1-preview

o1-preview was released September 12, 2024 as OpenAI's first reasoning model. It uses internal chain-of-thought to think through complex problems before responding. Scored 83.3% on the International Mathematics Olympiad qualifying exam (vs 13.4% for GPT-4o) and 78% on GPQA Diamond.

Released

2024-09-12

Context Window

128K tokens

Pricing

Type	Price per MTok
Input	$15.00
Output	$60.00

Benchmarks5

Knowledge

1 benchmark

90.8%#5/37

86th percentile

Reasoning

1 benchmark

78%#10/34

72th percentile

Math

2 benchmarks

94.8%#8/31

76th percentile

44.6%#11/12

13th percentile

Coding

1 benchmark

92.4%#4/25

84th percentile

Percentile among tested models:Top 25%50-75%25-50%Bottom 25%

o-series Family5

Model	Tier	Released	Input $/MTok
o3	flagship	2025-04-16	$10.00
o4-mini	mini	2025-04-16	$1.10
o3-mini	mini	2025-01-31	$1.10
o1	flagship	2024-12-05	$15.00
o1-mini	mini	2024-09-12	$3.00

Other OpenAI Models8

GPT-4.12025-04-14

GPT (flagship)

GPT-4.1 mini2025-04-14

GPT (mini)

GPT-4.1 nano2025-04-14

GPT (nano)

GPT-4o mini2024-07-18

GPT (mini)

GPT-4o2024-05-13

GPT (flagship)

GPT-4 Turbo2023-11-06

GPT (flagship)

GPT-42023-03-14

GPT (flagship)

GPT-3.5 Turbo2023-03-01

GPT (mid)

Details

Model Familyo-series

Tierpreview

Generationo1

Release Date2024-09-12

Context Window128K tokens

Open WeightNo

Modalitytext

Capabilities1

reasoning

Sources1

Learning to Reason with LLMs

Tags

openaireasoningo-series