Celon

GPT-5.4 nano

ChatInput: FileInput: ImageInput: TextReleased Mar 17, 2026

Built by OpenAI · United States · openai.com

GPT-5.4 nano is the most lightweight and cost-efficient variant of the GPT-5.4 family, optimized for speed-critical and high-volume tasks. It supports text and image inputs and is designed for low-latency...

How to use

model: "openai/gpt-5.4-nano"

Cap quality here and save

Hard questions go to this model, easy ones drop to something cheaper. Set a savings target (0–0.8) and the router tunes itself until realized savings converge on it.

{
  "model": "celon/auto",
  "celon": {
    "anchor": "openai/gpt-5.4-nano",
    "savings_target": 0.4
  }
}

Naming a model directly gets you that model — savings controls don't apply.

Context

400K

Max output

128K

Input $/1M

$0.20

Output $/1M

$1.25

Features

Tool callingJSON

Serving providers

OpenAI

Providers

Price, latency, and uptime per provider serving this model. Celon routes each request to the fastest and cheapest of them. Click a row for regions and data policies.

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Performance

Benchmark quality scores, and measured speed per provider.

Quality

Epoch Capabilities IndexComposite over 50+ benchmarks
146.6
GPQA DiamondPhD-level science questions
78.5%
AIMECompetition mathematics
87.8%
FrontierMathResearch-level mathematics
25.9%
SciCodeScientific code generation
46.9%
ARC-AGI-2Abstract reasoning
5.7%
SimpleQA VerifiedFactual accuracy
12.0%

At each model's best reasoning effort. Benchmarks it wasn't run on are omitted.

Speed

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