GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for...
At a glance
- Context window
- 1.1Mtokens
- Max output
- 128Ktokens
- Knowledge to
- —
- Released
- 2026
Capabilities
Benchmarks
- Coding index
- 71
Design Arena
| Category | Elo | Win rate |
|---|---|---|
| models · gamedev | 1,261 | 57.6 |
| models · uicomponent | 1,255 | 57.4 |
| models · dataviz | 1,250 | 56.6 |
| models · website | 1,232 | 52.5 |
| models · uicomponent | 1,230 | 63.6 |
| models · website | 1,228 | 52.7 |
| models · codecategories | 1,227 | 52.5 |
| models · codecategories | 1,225 | 52.7 |
| models · svg | 1,220 | 57.8 |
| models · asciiart | 1,217 | 55.4 |
| models · gamedev | 1,217 | 53.6 |
| models · gamedev | 1,214 | 52.8 |
| models · uicomponent | 1,214 | 52.5 |
| models · dataviz | 1,212 | 52.2 |
| models · website | 1,211 | 50.8 |
| models · website | 1,210 | 50.5 |
| models · asciiart | 1,207 | 52 |
| models · asciiart | 1,205 | 52.4 |
| models · dataviz | 1,196 | 50.1 |
| models · codecategories | 1,195 | 49.2 |
| models · codecategories | 1,193 | 49.2 |
| models · svg | 1,167 | 53.2 |
| models · svg | 1,151 | 50.4 |
| models · 3d | 1,130 | 42.3 |
| models · 3d | 1,093 | 38.9 |
| models · 3d | 1,075 | 37 |
Standard evaluations
| Benchmark | Score | Tasks |
|---|---|---|
| gpqa_diamond | 0.9 | 396 |
| tau_bench_verified_airline | 0.76 | 100 |
Source: Artificial Analysis, Design Arena · as of Sep 16, 2026
Performance
Reference uptime
100%
Median latency
2,163 ms
Throughput
43.9 tok/s
IranRouter uptime comes from our own automated probes; the reference figures are daily measurements of this model's upstream routes. Each card shows a 30-day average, and a day without data stays empty.
Popularity
- Current rank
- —
- Rank change, 7 days
- —
Daily tokens · 90 days
44.9B
Ranked by daily token volume across the global model market; the figure above the chart is the daily average.
Supported parameters
Parameters this model accepts; anything else is ignored.
Quick start
from openai import OpenAI
client = OpenAI(
api_key="ir-...",
base_url="https://iranrouter.com/v1",
)
resp = client.chat.completions.create(
model="openai/gpt-5.4",
messages=[{"role": "user", "content": "سلام!"}],
)
print(resp.choices[0].message.content)Only base_url and the key change; the rest of your code stays as it is.