The Model Index
Models/OpenAI

GPT-5.4 Nano

OpenAIReleased 17 Mar 2026Closed
Compare
144133–156Index score#74 of 229 models
3/ 8Core tests taken3 of 6 areas · plus 10 anchor tests
−26Versus the frontier at releasebest then: GPT-5.4
$0.20/ $1.25Price per million tokensinput / output, list price
400KContext windowtokens it reads at once

Where it sitson the frontier

o3 reached this score 11 months earlier.

Test resultsby area · tick = best by any model

Reasoning & knowledgeevidence
GPQA Diamond
78%
Humanity's Last Exam
no result
Mathsevidence
FrontierMath T1-3
45%
Codingevidence
SWE-bench Verified
no result
Terminal-Bench
no result
Agentsevidence
APEX-Agents
no result
Novel problemsevidence
ARC-AGI-2
6%
Long tasksno 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 sayrank on each leaderboard

The Model Indexindependent tests, our method#74of 219 · 144
LMArena · Mathsmaths questions in chat#105of 373 · 1425Epoch Capabilities Indexoverall capability from many benchmarks#75of 239 · 145.8LMArena · Codingcoding questions in chat#121of 383 · 1460LMArena · Textoverall chat quality, judged by people#140of 388 · 1401LMArena · Creative writingcreative writing#174of 386 · 1336LMArena · Visionunderstanding images#77of 149 · 1200LiveBench · Overalloverall, with fresh questions to limit contamination#48of 58 · 69.6

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 attop three among current models

Not in the top three among current models on any category we track.

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

Where to use itprices checked 1 Oct 2026

From the lab

ChatGPTapp · subscription↗OpenAI APIAPI↗

API providers 2 · per million tokens, in / out

OOpenAI$0.20 / $1.25cheapestAAzure$0.22 / $1.38↗

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

Released17 Mar 2026
Announcementnot linked yet
Release entry–
Scored asGPT-5.4 Nano
Artificial Analysis index–
Output speed–
Hugging Faceclosed weights

OpenAI releasesaround this one

ChatGPTClosed
GPT-4Closed
index 100