o3

OpenAIReasoning

Advanced reasoning model. Excels at math, science, and complex multi-step problems.

Pricing

Input (per 1M tokens)

$2.00

Output (per 1M tokens)

$8.00

Cost Examples

Scenario	Cost
100 chat messages (500 in / 200 out each)	$0.2600
1K API calls (2K in / 500 out each)	$8.0000
10K short requests (200 in / 100 out each)	$12.0000
1M tokens input + 100K output	$2.8000

Capabilities

Context Window

200K

Max Output

100K

Speed

40 tok/s

Released

2025-04-16

YesVision

YesTool Use

YesStreaming

YesJSON Mode

API Details

Model IDo3

API Endpointhttps://api.openai.com/v1/chat/completions

Last Updated2026-04-12

Other OpenAI Models

GPT-4.1Flagship

$2.00 in / $8.00 out per 1M tokens

GPT-4.1 MiniStandard

$0.40 in / $1.60 out per 1M tokens

GPT-4.1 NanoMini

$0.10 in / $0.40 out per 1M tokens

$2.50 in / $10.00 out per 1M tokens

GPT-4o MiniMini

$0.15 in / $0.60 out per 1M tokens

o4-miniReasoning

$1.10 in / $4.40 out per 1M tokens

GPT-3.5 TurboMini

$0.50 in / $1.50 out per 1M tokens

Open Cost Calculatorto compare o3 costs with other models