Celon

GPT 5

ChatInput: TextInput: ImageInput: FileReleased Aug 7, 2025

Built by OpenAI · United States · openai.com

GPT-5 is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. It is optimized for complex tasks that require step-by-step reasoning, instruction following, and accuracy...

How to use

model: "openai/gpt-5"

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",
    "savings_target": 0.4
  }
}

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

Context

272K

Max output

128K

Input $/1M

$1.25

Output $/1M

$10.00

Features

Image inputTool 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
150.0
GPQA DiamondPhD-level science questions
86.2%
AIMECompetition mathematics
91.4%
FrontierMathResearch-level mathematics
32.4%
SWE-bench VerifiedReal GitHub issue resolution
73.6%
Terminal-BenchAgentic terminal tasks
49.6%
SciCodeScientific code generation
42.9%
ARC-AGI-2Abstract reasoning
9.9%
SimpleQA VerifiedFactual accuracy
50.6%
HLEHumanity's Last Exam
25.3%

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

Speed

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