GPT-5.2
GPT-5.2 is a previous OpenAI flagship for complex professional work, following GPT-5.1 in the GPT-5 series.
input · usd / 1m tok
$1.75
output · usd / 1m tok
$14.00
context window
400ktokens
modalities · in → out
takes text and image in, gives text out
pricing
base api ratesusd per 1m tokens
- input
- $1.75
- output
- $14.00
- cache read
- $0.175
providers
Different companies host GPT-5.2. Impossibl routes your request intelligently and handles failover automatically when a provider is down.
- Azure OpenAI
- OpenAI
specifications
takes text and image in, gives text outopenai/gpt-5.2
- creatorOpenAI
- model typeText generation
- context window400,000 tokens
- maximum outputnot published
- input
takes text and image in, gives text out
- outputtext
- tool callingnot verified
- releaseddec 11, 2025
- 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/gpt-5.2",
input="",
)
print(resp.output_text)
edit the prompt, then run
benchmarks
intelligence index
30.4#33 of 90 models on the gateway
- omniscience-0.9#40 of 86
- gpqa90.3%#34 of 88
- humanity’s last exam37.7%#35 of 89
- AIME 202599.0%
- GPQA90.3%
- LiveCodeBench88.9%
- Tau284.8%
- AA-LCR82.7%
- IFBench75.4%
- Terminal-Bench Hard47.0%
- Humanity’s Last Exam37.7%
- CritPt11.6%
- Intelligence Index30.45
- Omniscience Index-0.88
- intelligence index (API)30.4
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 2026-09-10.
compare GPT-5.2 with other models
frontier labs and open weights, best-ranked firstusd / 1m tok · in / out
- anthropic/claude-fable-5-1$10.00 / $50.00compare →
- meta/muse-spark-1.3$1.25 / $4.25compare →
- zai/glm-5.3$1.40 / $4.40compare →
- xai/grok-4.6$2.00 / $6.00compare →
frequently asked questions
What is GPT-5.2?
GPT-5.2 is a previous OpenAI flagship for complex professional work, following GPT-5.1 in the GPT-5 series. It improves agentic and long-context performance over GPT-5.1 and keeps configurable reasoning effort from none through xhigh, allocating compute adaptively so simple requests return quickly.
How much does GPT-5.2 cost?
GPT-5.2 costs $1.75 per million input tokens and $14.00 per million output tokens through the Impossibl API. Cache reads cost $0.175 per million tokens. All rates are in USD.
What is the context length of GPT-5.2?
GPT-5.2 has a 400,000-token context window through the Impossibl API.
What inputs and outputs does GPT-5.2 support?
GPT-5.2 accepts text and image as input. GPT-5.2 returns text.
How do I use GPT-5.2 through an API?
GPT-5.2 is available through the Impossibl API. Use openai/gpt-5.2 as the model identifier with /v1/chat/completions. The quickstart explains how to create an API key and send your first request.
When was GPT-5.2 released?
OpenAI released GPT-5.2 on December 11, 2025.
this page describes GPT-5.2 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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