OpenAI o1

OpenAI o1 is the first full model in OpenAI's o-series, trained with large-scale reinforcement learning to spend more time thinking before it responds.

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input · usd / 1m tok

$15.00

output · usd / 1m tok

$60.00

context window

200ktokens

modalities · in → out

pricing

base api ratesusd per 1m tokens

input: $15.00
output: $60.00
cache read: $7.50

providers

OpenAI hosts OpenAI o1. Impossibl routes your request intelligently and handles failover automatically when a provider is down.

OpenAI

specifications

takes text and image in, gives text outopenai/o1

creatorOpenAI
model typeText generation
context window200,000 tokens
maximum outputnot published
input
takes text and image in, gives text out
outputtext
tool callingnot verified
releaseddec 5, 2024
endpoint/v1/chat/completions

unknown means the public catalog does not establish that fact. a model's documented capabilities can differ from what a particular api supports. see the model documentation for integration details.

try it · your prompt, this model, live

# responses API
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["IMPOSSIBL_API_KEY"],
    base_url="https://api.impossibl.com/v1",
)

resp = client.responses.create(
    model="openai/o1",
    input="▌",
)
print(resp.output_text)

edit the prompt, then run

# responses API
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["IMPOSSIBL_API_KEY"],
    base_url="https://api.impossibl.com/v1",
)

resp = client.responses.create(
    model="openai/o1",
    input="▌",
)
print(resp.output_text)

edit the prompt, then run

benchmarks

intelligence index

15.2#85 of 108 models on the gateway

coding index39.7#50 of 64
omniscience-11.1#53 of 84
gpqa74.7%#63 of 80
humanity’s last exam7.0%#74 of 87

GPQA74.7%
IFBench70.3%
LiveCodeBench67.9%
AA-LCR65.0%
Tau262.6%
Terminal-Bench Hard12.9%
Humanity’s Last Exam7.0%
CritPt0.3%

Intelligence Index15.23
Omniscience Index-11.05
coding index (API)39.7
intelligence index (API)15.2

view source ↗all source data and breakdowns (json) ↗

each configuration is listed separately; these evaluations describe the tested model configuration, and performance and costs can differ on impossibl. unmeasured scores are omitted and api values keep their source units. last checked 2026-10-14.

compare OpenAI o1 with other models

frontier labs and open weights, best-ranked firstusd / 1m tok · in / out

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impossibl models --all →

frequently asked questions

What is OpenAI o1?

OpenAI o1 is the first full model in OpenAI's o-series, trained with large-scale reinforcement learning to spend more time thinking before it responds. It is aimed at hard reasoning in math, science, and coding, and accepts image input alongside text.

How much does OpenAI o1 cost?

OpenAI o1 costs $15.00 per million input tokens and $60.00 per million output tokens through the Impossibl API. Cache reads cost $7.50 per million tokens. All rates are in USD.

view the pricing table ↑

What is the context length of OpenAI o1?

OpenAI o1 has a 200,000-token context window through the Impossibl API.

What inputs and outputs does OpenAI o1 support?

OpenAI o1 accepts text and image as input. OpenAI o1 returns text.

How do I use OpenAI o1 through an API?

OpenAI o1 is available through the Impossibl API. Use openai/o1 as the model identifier with /v1/chat/completions. The quickstart explains how to create an API key and send your first request.

follow the api quickstart →

When was OpenAI o1 released?

OpenAI released OpenAI o1 on December 5, 2024.

Creator release announcement ↗

this page describes OpenAI o1 as listed by the impossibl public api. prices and availability come from that catalog, refreshed here every five minutes. this is an impossibl offering, not a comparison of independent hosting-provider quotes. model descriptions and release dates, where available, use the creator sources linked under the answers above.

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