GPT-5.4 mini

GPT-5.4 mini is the faster, more efficient tier of OpenAI's GPT-5.4 family, designed for high-volume workloads.

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input · usd / 1m tok

$0.75

output · usd / 1m tok

$4.50

context window

400ktokens

modalities · in → out

pricing

base api ratesusd per 1m tokens

input: $0.75
output: $4.50
cache read: $0.075

providers

Different companies host GPT-5.4 mini. Impossibl routes your request intelligently and handles failover automatically when a provider is down.

Azure OpenAI
Azure AI Foundry
OpenAI

specifications

takes text and image in, gives text outopenai/gpt-5.4-mini

creatorOpenAI
model typeText generation
context window400,000 tokens
maximum outputnot published
input
takes text and image in, gives text out
outputtext
tool callingnot verified
releasedmar 17, 2026
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-5.4-mini",
    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/gpt-5.4-mini",
    input="▌",
)
print(resp.output_text)

edit the prompt, then run

benchmarks

intelligence index

24.6#50 of 90 models on the gateway

coding index56.1#36 of 60
agentic index19.7#35 of 49
omniscience-18.9#66 of 86
gpqa87.5%#41 of 88
humanity’s last exam28.1%#49 of 89
terminal-bench v2.159.2%#39 of 57

GPQA87.5%
Tau283.3%
AA-LCR77.0%
MMMU-Pro73.3%
IFBench73.3%
Harvey LAB60.7%
Terminal-Bench v2.159.2%
Terminal-Bench Hard52.3%
SciCode52.1%
ITBench35.2%
APEX-Agents28.2%
Humanity’s Last Exam28.1%
AutomationBench Partial26.2%
Tau Banking25.6%
AnalystAgent15.0%
GDP.pdf All-pass13.4%
CritPt10.0%
Multilingual LCR3.9%
Terminal-Bench v4.02.0%

Intelligence Index24.58
Omniscience Index-18.92
GDPval Elo1094.54
coding index (API)56.1
agentic index (API)19.7
intelligence index (API)24.6

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 2026-09-10.

compare GPT-5.4 mini 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 →

impossibl models --all →

frequently asked questions

What is GPT-5.4 mini?

GPT-5.4 mini is the faster, more efficient tier of OpenAI's GPT-5.4 family, designed for high-volume workloads. OpenAI calls it its strongest mini model yet for coding, computer use, and subagents, keeping text and image input and strong reasoning while sitting between GPT-5.4 and the lighter nano.

How much does GPT-5.4 mini cost?

GPT-5.4 mini costs $0.75 per million input tokens and $4.50 per million output tokens through the Impossibl API. Cache reads cost $0.075 per million tokens. All rates are in USD.

view the pricing table ↑

What is the context length of GPT-5.4 mini?

GPT-5.4 mini has a 400,000-token context window through the Impossibl API.

What inputs and outputs does GPT-5.4 mini support?

GPT-5.4 mini accepts text and image as input. GPT-5.4 mini returns text.

How do I use GPT-5.4 mini through an API?

GPT-5.4 mini is available through the Impossibl API. Use openai/gpt-5.4-mini 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 GPT-5.4 mini released?

OpenAI released GPT-5.4 mini on March 17, 2026.

Creator release announcement ↗

this page describes GPT-5.4 mini 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.

view the source catalog ↗model as markdown ↗report a correction →