GPT-5 Pro vs o3 Pro (Comparative Analysis)
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Overview
o3 Pro was released 3 months before GPT-5 Pro.
 GPT-5 Pro | o3 Pro | |
|---|---|---|
Model Provider The organization behind this AI's development | OpenAI | OpenAI |
Input Context Window Maximum input tokens this model can process at once | 400K tokens | 200K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 128K tokens | 100K tokens |
Release Date When this model first became publicly available | October 6, 2025 9 months ago October 6th, 2025 | June 10, 2025 1 year ago June 10th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | September 30, 2024 | June 30, 2024 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
GPT-5 Pro | o3 Pro | |
|---|---|---|
Input Types Supported input formats | 🖼️Image📝Text📁File | 📝Text📁File🖼️Image |
Reasoning Controls Defaults and configurable reasoning effort | Always enabledEffort: HighDefault: High | Optional |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | GPT | GPT |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation |
Pricing
GPT-5 Pro is roughly 0.8x less expensive compared to o3 Pro for input tokens and roughly 1.5x more expensive for output tokens.
| GPT-5 Pro | o3 Pro | |
|---|---|---|
Input Token Cost Cost per million input tokens | $15.00 per million tokens | $20.00 per million tokens |
Output Token Cost Cost per million output tokens | $120.00 per million tokens | $80.00 per million tokens |
Web Search Cost Additional cost for each web search operation | $0.01 per search | $0.01 per search |
At a Glance
Quick overview of what makes GPT-5 Pro and o3 Pro unique.
GPT-5 Pro by OpenAI understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 400K token context window. Premium pricing at $15.00/M input and $120.00/M output tokens. Includes built-in content moderation for safer outputs. Released October 6th, 2025.o3 Pro by OpenAI understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 200K token context window. Premium pricing at $20.00/M input and $80.00/M output tokens. Includes built-in content moderation for safer outputs. Released June 10th, 2025.Explore More Comparisons
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