OpenAI · Balanced
OpenAI o1 Pro
OpenAI's flagship series of reasoning models for solving hard problems. The o1 series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o1-pro model uses more compute to think harder and provide consistently better answers. o1 pro comes with a massive 100,000 word output window.
- Vision
- PDF input
- Input
- Text, Images
- Output
- Text
- Discovery tier
- Balanced
Pricing
USD per 1M tokens- Input
- $150.00
- Output
- $600.00
- Cache read
- $75.00
Reference prices as published by the model provider. API example
Specifications
- Context window
- 200K
- Max output
- 100K
- Average output (7 days)
- 34 tokens
- Longer than 2% of 468 models
Side by side
OpenAI o1 Pro compared
Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.
| OpenAI o1 ProOpenAIThis model | OpenAI o3-pro (2025-06-10)OpenAIRemove | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Discovery tier | Balanced | Frontier |
| Added | Jan 25, 2025 | Jan 1, 2024 |
| Limits | ||
| Context window | 200K | 200K |
| Max output | 100K | 100K |
| Average output | 34 tokens | — |
| Pricing, USD per 1M tokens | ||
| Input | $150.00 | $22.00Best |
| Output | $600.00 | $88.00Best |
| Cache read | $75.00 | $11.00Best |
| Benchmark indexes | ||
| Intelligence Index | 12.4 | 21.9Best |
| Capabilities | ||
| Reasoning | No | Yes |
| Tools | No | Yes |
| Vision | Yes | No |
| Structured output | No | Yes |
| PDF input | Yes | No |
| Reasoning effort | — | low, medium, high |
Public evaluations
Benchmarks
Independent evaluation results, with how each score ranks among the models in the Noumen catalog.
- OpenAI o1 Pro
- OpenAI o3-pro (2025-06-10)
Intelligence Index
- OpenAI o1 Pro12.4
- OpenAI o3-pro (2025-06-10)21.9
OpenAI o1 Pro: Better than 26% of 326 scored models
Reasoning and knowledge
GPQA Diamond
Graduate-level science questions
- OpenAI o1 Pro: —
- OpenAI o3-pro (2025-06-10): 84.5%
Scores from Artificial Analysis, updated Oct 26, 2026.
Developers
Use it through the API
Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.
curl https://www.noumen.xyz/api/v1/chat/completions \
-H "Authorization: Bearer $NOUMEN_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/o1-pro",
"messages": [{ "role": "user", "content": "Explain this stack trace." }]
}'import os
from openai import OpenAI
client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
model="openai/o1-pro",
messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)OpenAI
Related models
Other OpenAI models, starting with the same family.