OpenAI

o3 Cost Calculator

Estimate your exact monthly API cost for o3. Enter your token volume and see the math — OpenRouter vs Neureus side-by-side.

$9.00 Input /M (Neureus)

$36.00 Output /M (Neureus)

200K Context window

−10% vs OpenRouter

Published pricing

Input (OpenRouter) $10.00/M

Input (Neureus) $9.00/M

Output (OpenRouter) $40.00/M

Output (Neureus) $36.00/M

Monthly cost estimator

How much will o3 cost?

Input tokens / month

Output tokens / month

Standard cost (OpenRouter)

—

N Neureus cost

—

You save — per month with Neureus

Cost breakdown

Type	Volume	Rate (OpenRouter)	Total (OpenRouter)	Rate (Neureus)	Total (Neureus)
Input	—	$10.00/M	—	$9.00/M	—
Output	—	$40.00/M	—	$36.00/M	—
Total			—		—

Model details

Context window

200K tokens

Maximum combined input + output size per request

Max output

100K tokens

Maximum tokens in a single response

Modalities

text, code

Input types supported by this model

Provider

OpenAI

Access this model through Neureus or directly

OpenAI's most powerful reasoning model. Designed for complex multi-step problems, scientific research, advanced coding, and agentic workflows.

Full model documentation →

More OpenAI models

GPT-4.1

$1.80 input /M (Neureus)

1M context

GPT-4.1 mini

$0.36 input /M (Neureus)

1M context

GPT-4o

$2.25 input /M (Neureus)

128K context

GPT-4o mini

$0.14 input /M (Neureus)

128K context

Use o3 for free.

Free tier includes 5M tokens — no credit card. Access o3 and 34 other models through one API key, priced 10% below OpenRouter.

Start for free ← All model prices