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🧠 ReasoningMid-Range

o3

by OpenAI

Advanced reasoning model for complex problem-solving

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Input Price

$2

per 1M tokens

Output Price

$8

per 1M tokens

Context Window

1,000K

tokens (131.072K max output)

Specifications

Release Date2025-04-16
Category🧠 Reasoning
Context Window1,000,000 tokens
Max Output131,072 tokens
ProviderOpenAI
Input Cost$2 / 1M tokens
Output Cost$8 / 1M tokens
Price TierMid-Range

Capabilities

textreasoningvisioncode

Related Use Cases

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AI Agent / Agentic Workflows

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AI Chatbot

Calculate the API cost of running a customer support or conversational AI chatbot.

~2,000 in · ~500 out
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Document Summarizer

Calculate how much it costs to summarize documents, reports, and articles with AI.

~8,000 in · ~1,000 out
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AI Code Assistant

Calculate the cost of building an AI-powered coding assistant or copilot.

~4,000 in · ~2,000 out
✍️

Content Generation

Calculate the cost of generating blog posts, marketing copy, and articles with AI.

~1,500 in · ~3,000 out
🖼️

Image Analysis

Calculate the cost of analyzing images with AI vision models.

~6,000 in · ~500 out

Monthly Cost Estimates

Usage LevelDaily TokensDailyMonthlyYearly
Light~50 requests/day100K in / 20K out$0.36$10.80$131
Medium~200 requests/day500K in / 100K out$1.80$54.00$657
Heavy~1K requests/day2,000K in / 500K out$8.00$240.00$2920
Enterprise~5K requests/day10,000K in / 2,000K out$36.00$1080.00$13140

Cost Calculator

Alternatives to o3

💰 Cheaper Options

Mistral Medium 3.5Mistral AI
10% cheaper
$1.5/M in · $7.5/M out
Gemini 3.6 FlashGoogle
10% cheaper
$1.5/M in · $7.5/M out
Grok 4.5xAI
20% cheaper
$2/M in · $6/M out
Grok 4.6xAI
20% cheaper
$2/M in · $6/M out

🚀 More Powerful

Gemini 3.5 FlashGoogle
5% more
$1.5/M in · $9/M out
GPT-5.1OpenAI
13% more
$1.25/M in · $10/M out
GPT-5OpenAI
13% more
$1.25/M in · $10/M out
Gemini 2.5 ProGoogle
13% more
$1.25/M in · $10/M out

Frequently Asked Questions

How much does o3 API cost per million tokens?▼
o3 costs $2 per million input tokens and $8 per million output tokens as of 2026. These are the standard API rates from OpenAI.
What is the o3 context window?▼
o3 supports a 1M context window (1,000,000 tokens), which means you can process up to 1M tokens in a single API call.
How much does o3 cost per month?▼
At medium usage (~200 requests/day with 500K input and 100K output tokens/day), o3 costs approximately $54.00/month. Light usage runs about $10.80/month, and heavy usage (~1K requests/day) around $240.00/month.
Is there a cheaper alternative to o3?▼
Yes — Mistral Medium 3.5 by Mistral AI is a cheaper option at $1.5/M input tokens vs $2/M for o3. Other budget alternatives include models in the efficient tier.
Is o3 good for ai agent / agentic workflows?▼
o3 is a reasoning model with support for text, reasoning, vision. For ai agent / agentic workflows, it offers 1M context and costs $2/M input tokens — a mid-range option for this use case.

o3 Comparisons

gpt 6 astra vs o3 deep researchgpt 6 astra vs o3 progpt 6 astra vs o3gpt 6 astra vs o3 minicodex mini latest vs o3 deep researchcodex mini latest vs o3 procodex mini latest vs o3codex mini latest vs o3 mini

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