GPT-5 mini vs o3-pro

Compare OpenAI and OpenAI AI models

OpenAI

GPT-5 mini

OpenAI

o3-pro

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Cost Comparison (1000 input + 500 output tokens, 100 requests/day)

GPT-5 mini

Per Request:$0.001250

Daily:$0.125

Monthly:$3.75

Yearly:$45.625

o3-pro

Per Request:$0.06

Daily:$6.00

Monthly:$180.00

Yearly:$2,190.00

Cost Differences

+$0.05875

Per Request

+$5.875

Daily

+$176.25

Monthly

+$2,144.375

Yearly

o3-pro costs more than GPT-5 mini

Feature Comparison

Feature	GPT-5 mini	o3-pro
Provider	OpenAI	OpenAI
Input Price	$0.25/1M tokens	$20.00/1M tokens
Output Price	$2.00/1M tokens	$80.00/1M tokens
Context Window	500,000 tokens	1,000,000 tokens
Max Output	65,536 tokens	131,072 tokens
Category	efficient	reasoning
Capabilities	textvisioncode	textreasoningcode
Release Date	8/7/2025	6/10/2025

GPT-5 mini vs o3-pro: Which Should You Choose?

Choosing between GPT-5 mini and o3-pro depends on your priorities: cost efficiency, context length, or raw capability. GPT-5 mini is the more affordable option at $0.25/1M input tokens — 99% cheaper than o3-pro. Meanwhile, o3-pro offers a significantly larger context window at 1,000,000 tokens vs 500,000 for GPT-5 mini.

These models target different tiers: GPT-5 mini is a efficient model while o3-pro is reasoning. This means they're optimized for different workloads. o3-pro targets more demanding workloads, while GPT-5 mini provides a cost-effective option for everyday tasks.

Output costs matter too. GPT-5 mini charges $2.00/1M output tokens vs $80.00 for o3-pro. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. GPT-5 mini has the edge here at $2.00/1M output tokens.

Multimodal capabilities: GPT-5 mini supports vision (image inputs) while o3-pro is text-only. If your application needs image understanding, this narrows your choice.

Best Use Cases

Choose GPT-5 mini when:

• Budget is a primary concern
• You're already using OpenAI's API ecosystem
• You're running high-volume, latency-sensitive workloads

Choose o3-pro when:

• You need a larger context window (1,000,000 tokens)
• You need longer outputs (up to 131,072 tokens)
• You're already using OpenAI's API ecosystem

Try Different Scenarios

Use the calculator below to see how costs change with different usage patterns

GPT-5 mini (OpenAI)

Cost Calculator

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Model

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o3-pro (OpenAI)

Cost Calculator

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Model

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Frequently Asked Questions

Which is cheaper, GPT-5 mini or o3-pro?▼

GPT-5 mini is cheaper for input tokens at $0.25 per million tokens vs $20.00 for o3-pro — that's 99% savings on input costs.

What is the context window difference between GPT-5 mini and o3-pro?▼

GPT-5 mini supports 500,000 tokens while o3-pro supports 1,000,000 tokens — a difference of 500,000 tokens in favor of o3-pro.

Which model is better for AI Chatbot?▼

Both models support text. For ai chatbot, GPT-5 mini is the lower-cost option, while o3-pro offers a larger context window (1,000,000 vs 500,000 tokens). Choose GPT-5 mini for budget sensitivity or o3-pro for longer context tasks.

Which model has better overall pricing for heavy usage?▼

At 100 requests/day with 1,000 input and 500 output tokens each, GPT-5 mini costs about $3.75/month and o3-pro costs about $180.00/month. Overall, GPT-5 mini has lower combined input + output rates ($0.25 in, $2.00 out) vs o3-pro.