OpenAI · Frontier
OpenAI o3-pro (2025-06-10)
The pro version of the already fantastic o3.
- Reasoning
- Tools
- Structured output
- Input
- Text
- Output
- Text
- Reasoning effort
- low · medium · high
- Discovery tier
- Frontier
Pricing
USD per 1M tokens- Input
- $22.00
- Output
- $88.00
- Cache read
- $11.00
Reference prices as published by the model provider. API example
Specifications
- Context window
- 200K
- Max output
- 100K
Side by side
OpenAI o3-pro (2025-06-10) compared
Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.
| OpenAI o3-pro (2025-06-10)OpenAIThis model | GPT 6 Luna ProOpenAIRemove | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Discovery tier | Frontier | Efficient |
| Added | Jan 1, 2024 | Sep 22, 2026 |
| Limits | ||
| Context window | 200K | 1.05MBest |
| Max output | 100K | 128KBest |
| Average output | — | 2.8K tokens |
| Pricing, USD per 1M tokens | ||
| Input | $22.00 | $0.10Best |
| Output | $88.00 | $0.50Best |
| Cache read | $11.00 | $0.01Best |
| Cache write | — | $0.13 |
| Performance | ||
| Throughput | — | 245.6 tok/s |
| Time to first token | — | 22.2 s |
| Request success (24h) | — | 100.0% |
| Benchmark indexes | ||
| Intelligence Index | 21.9 | — |
| Capabilities | ||
| Reasoning | Yes | Yes |
| Tools | Yes | Yes |
| Vision | No | Yes |
| Structured output | Yes | Yes |
| PDF input | No | Yes |
| Reasoning effort | low, medium, high | low, medium, high, xhigh, max |
Public evaluations
Benchmarks
Independent evaluation results, with how each score ranks among the models in the Noumen catalog.
- OpenAI o3-pro (2025-06-10)
- GPT 6 Luna Pro
Intelligence Index
- OpenAI o3-pro (2025-06-10)21.9
- GPT 6 Luna Pro—
OpenAI o3-pro (2025-06-10): Better than 53% of 326 scored models
Reasoning and knowledge
GPQA Diamond
Graduate-level science questions
- OpenAI o3-pro (2025-06-10): 84.5%
- GPT 6 Luna Pro: —
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/o3-pro-2025-06-10",
"reasoning_effort": "medium",
"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/o3-pro-2025-06-10",
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.