OpenAI · Released Jun 10, 2025o3-pro
High-effort o3 tier for difficult technical reasoning and careful answers.
- Capability
- 147.4ECI · #60 of 148
- Input
- $20.00per 1M tokens
- Output
- $80.00per 1M tokens
- Context
- 200K100K max output
What it costs
- Input
- $20.00per million tokens
- Output
- $80.00per million tokens
- Blended (3:1)
- $35.00pricier than 98% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $80.00 |
| Team assistant25M input + 5M output tokens | $900.00 |
| Production app250M input + 50M output tokens | $9,000 |
Official OpenAI API price, as listed on models.dev.
Independent benchmarks
#60 of 148 scored models
The shaded band is Epoch AI’s confidence range (145.8–149.7); the tick marks the median scored model.
Scores from Epoch AI, run independently of OpenAI.
The details
- Lab
- OpenAI
- Released
- Jun 10, 2025
- Knowledge cutoff
- May 2024
- Context window
- 200,000 tokens
- Max output
- 100,000 tokens
- Inputs
- Text, Images
- Output
- Text
- Reasoning
- Adjustable effort low · medium · high
- Tool calling
- Yes
- Structured output
- Yes
- Weights
- Proprietary
- API model ID
o3-proon OpenAI- Availability
- 6 API providerslisted on models.dev
What OpenAI claims
Published by the lab at launch. Settings vary, so compare these only with care.
| Benchmark | Score | Setting | Source |
|---|---|---|---|
| Aider Polyglot | 84.9 percent correct | — | Source |
More from OpenAI
About o3-pro
How much does o3-pro cost?
o3-pro costs $20.00 input / $80.00 output per million tokens (official OpenAI API price). At a 3:1 input-to-output mix that is $35.00 per million tokens, more expensive than 98% of the 360 priced models we track.
What is the context window of o3-pro?
o3-pro accepts up to 200,000 tokens per request and can write up to 100,000 tokens in one response.
How good is o3-pro?
Epoch AI gives o3-pro a Capabilities Index score of 147.4 (likely range 145.8–149.7), ranking it #60 of 148 models Epoch has scored.
Is o3-pro open source?
No. o3-pro is proprietary; you use it through OpenAI’s API or partner platforms.
What inputs does o3-pro support?
o3-pro accepts text and images and replies in text. It is a reasoning model with low, medium and high effort settings, supports tool calling and can return structured JSON output.
When was o3-pro released?
OpenAI released o3-pro on Jun 10, 2025. Its training data runs to May 2024.
What are the best alternatives to o3-pro?
The closest current models from other labs on capability, price and release date are Claude Opus 4.1 (Anthropic, ECI 144.1, $15.00 / $75.00), Gemini 2.5 Pro (Google, ECI 145.3, $1.25 / $10.00), Inkling (Thinking Machines, ECI 148.6, $3.74 / $9.36) and DeepSeek-R1-Distill-Qwen-32B (DeepSeek, ECI 137.4).