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DevFormula
AI Tokens & Cloud ComputeVerified 2026-10-21

OpenAI o1-mini Fast Reasoning Cost Calculator

Simulate math and programming reasoning workloads on OpenAI o1-mini ($3.00 input / $12.00 output per 1M tokens).

Parameters & Config

Pre-configured official API pricing for this specific model tier

tokens
tokens
10tokens128,000tokens

Prompt payload size including system prompt, user prompt, and chat history

tokens
tokens
10tokens16,000tokens

Generated output tokens returned by the model

calls/day
calls/day
10calls/day10,000,000calls/day

Total API requests processed per day across all users

$
$
0.001$100$

Cost per 1,000,000 incoming prompt tokens

$
$
0.001$200$

Cost per 1,000,000 generated completion tokens

Projected Monthly BillLIVE ESTIMATE
$990.00

Estimated 30-day cloud billing based on current traffic and model selection

Daily Burn RateLIVE ESTIMATE
$33.00

Average daily API infrastructure expenditure incurred

Key Metrics & Sub-Totals

3 items
Monthly Total TokensTotal prompt and completion tokens processed over 30 days
150,000,000 tokens
Monthly Input Cost ShareCost attributable to incoming prompt and context window tokens
$270.00
Monthly Output Cost ShareCost attributable to autoregressive generation tokens
$720.00

Calculation Summary & Unit Breakdown

MetricCalculated ValueNotes / Logic
Active Model Configurationo1-mini (OpenAI Fast Reasoning • $3.00 / $12.00)-
Daily Request Volume2,000queries/day
Tokens per Request2,500Prompt: 1,500 / Output: 1,000
Daily Token Burn5,000,000tokens/day
Monthly Total Tokens150,000,00030-day projection
Daily Average Infrastructure Cost$33.00USD
Monthly Prompt (Input) Token Cost$270.00USD
Monthly Completion (Output) Token Cost$720.00USD
Total Projected Monthly Cloud Bill$990.00USD

Overview & Methodology

OpenAI o1-mini provides high-speed reasoning optimized for coding, mathematics, and science at an 80% cost reduction compared to o1. Priced at $3.00/1M input tokens and $12.00/1M output tokens, it delivers elite code generation economics.

Mathematical Formulation

Single Cost = (Prompt / 1M × 3.00) + (Completion + Reasoning / 1M × 12.00). Monthly = Single Cost × Daily Requests × 30.

Optimization Best Practices

1

Use o1-mini for automated unit test generation, complex SQL query synthesis, and algorithmic code reviews.

2

Unlike full o1, o1-mini is not trained on broad world knowledge; use it strictly for STEM and technical tasks.

3

Benchmark against GPT-4o: for pure coding tasks, o1-mini often achieves higher pass@1 accuracy at comparable cost.

Frequently Asked Questions

Q.How much does 5,000 o1-mini requests cost at 1.5k input / 1k output?
A.

5,000 requests consume 7.5M input ($22.50) and 5M output ($60.00), totaling $82.50 ($0.0165 per call).

Q.Does o1-mini support streaming API responses?
A.

Yes. OpenAI supports server-sent event (SSE) streaming for o1-mini completion tokens.

Q.What is the cached input price on o1-mini?
A.

Cached prompt tokens on o1-mini are discounted 50% to $1.50 per 1M tokens.