o3 is OpenAI's mainstream reasoning model, replacing the original o1 with a dramatic price cut and better benchmark scores. It is the recommended choice for math, science, and complex agentic tasks where extended thinking improves quality.
Input Price
$2.00/1M
per 1M tokens
Output Price
$8.00/1M
per 1M tokens
Context Window
200K tokens
max tokens
ELO Score
1395
LMSYS Arena
Pricing Breakdown
| Volume | Input Cost | Output Cost | Combined (50/50) |
|---|---|---|---|
| 1,000 tokens | $0.0020 | $0.0080 | $0.0050 |
| 10,000 tokens | $0.0200 | $0.0800 | $0.0500 |
| 100,000 tokens | $0.2000 | $0.8000 | $0.5000 |
| 1,000,000 tokens | $2.0000 | $8.0000 | $5.0000 |
Strengths
- ✓Top-tier reasoning on math, science, and agentic tasks
- ✓87% cheaper than original o1 at the same capability tier
- ✓200K context window
- ✓Strong chain-of-thought for complex problem solving
Weaknesses
- ✗Higher latency than non-reasoning models
- ✗Verbose output increases effective cost
Compare o3 With
Frequently Asked Questions
How much does o3 cost?
o3 costs $2.00/1M per 1M input tokens and $8.00/1M per 1M output tokens.
What is o3's context window?
o3 has a context window of 200K tokens, which means it can process up to 200,000 tokens in a single request.
Is o3 open source?
No, o3 is a proprietary model by OpenAI and is not open source.
What is o3 best used for?
o3 is best suited for: reasoning, math, research, coding. Top-tier reasoning on math, science, and agentic tasks.
What is o3's ELO score?
o3 has an ELO score of 1395 on the LMSYS Chatbot Arena leaderboard, placing it among top-tier models.