OpenAI
o3 Pro
The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning.
At a glance
- Input / 1M
- $20
- Output / 1M
- $80
- Context
- 200K
- Max output
- 100K
- Intelligence
- 21.9
- Released
- Jun 2025
Pricing
o3 Pro API pricing
Per-token rates, plus what common tasks actually cost.
| Input tokensPer 1M tokens | $20 |
|---|---|
| Output tokensPer 1M tokens | $80 |
| Cached input (read)Per 1M tokens | Not available |
| Cache writePer 1M tokens | Not available |
| Web searchPer request | $0.01 |
Chat message
2K in, 500 out
$80
per 1,000 requests
Coding task
30K in, 4K out
$920
per 1,000 requests
Long document summary
150K in, 2K out
$3160
per 1,000 requests
Benchmarks
o3 Pro benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
21.9
Coding index
Not available
Agentic index
Not available
Specs
Context window and capabilities
What it can read, what it can write, and which API features it supports.
- Context window
- 200K tokens
- Max output
- 100K tokens
- Input types
- File, Image, Text
- Output types
- Text
- Reasoning effort
- Not available
- Release date
- June 10, 2025
- Knowledge cutoff
- June 30, 2024
- Tool calling
- Structured outputs
- JSON mode
- Reasoning
- Temperature
- Stop sequences
- Deterministic seed
- Verbosity control
Compare
o3 Pro vs other models
See how o3 Pro stacks up head to head on price, benchmarks, and features.
VSo3 Pro vs GPT-5.1
OpenAI vs OpenAI
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OpenAI vs OpenAI
See comparisonVSo3 Pro vs GPT-5.1-Codex
OpenAI vs OpenAI
See comparisonVSo3 Pro vs GPT-5
OpenAI vs OpenAI
See comparisonVS
o3 Pro vs Claude Opus 4.1
OpenAI vs Anthropic
See comparisonVSo3 Pro vs Claude Sonnet 4.5
OpenAI vs Anthropic
See comparisonMore o3 Pro comparisons
Alternatives
o3 Pro alternatives
Similar models worth considering, and where each one has the edge.
OpenAI
GPT-5.1
OpenAI
GPT-5.4 Mini
OpenAI
GPT-5.1-Codex
Want to learn about other models? Browse all models
FAQ
Frequently asked questions
How much does o3 Pro cost?
o3 Pro costs $20 per 1M input tokens and $80 per 1M output tokens through the API. A typical chat message costs about $80 per 1,000 messages.
What is the context window of o3 Pro?
o3 Pro accepts up to 200K tokens of input and can write up to 100K tokens in a single response.
What is the best alternative to o3 Pro?
GPT-5.1 from OpenAI is a strong alternative. It offers: 8x cheaper output, higher intelligence score, larger 400k context.
Can I use o3 Pro alongside other models?
Yes. Shortcut Chat sends one prompt to o3 Pro and any other models you pick at the same time, so you can compare answers side by side.
Try o3 Pro next to every other model.
Use o3 Pro alongside all the other models. Use one at a time, or multiple together. Get the best answer from every AI.