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
Capabilities
textreasoningvisioncode
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Monthly Cost Estimates
| Usage Level | Daily Tokens | Daily | Monthly | Yearly |
|---|---|---|---|---|
| Light~50 requests/day | 100K in / 20K out | $0.36 | $10.80 | $131 |
| Medium~200 requests/day | 500K in / 100K out | $1.80 | $54.00 | $657 |
| Heavy~1K requests/day | 2,000K in / 500K out | $8.00 | $240.00 | $2920 |
| Enterprise~5K requests/day | 10,000K in / 2,000K out | $36.00 | $1080.00 | $13140 |
Cost Calculator
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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 — Grok 4.20 by xAI is a cheaper option at $2/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
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