GPT-5 Pro
GPT-5 Pro is the separately named high-compute GPT-5 reasoning tier, first available in ChatGPT and later in the Responses API. It spends more computation on difficult questions and prioritizes accuracy and completeness over response speed. The API supports only high reasoning effort, and some requests require minutes; background execution is useful for such jobs.
2025-08-07
Unreleased
Undisclosed proprietary architecture
Proprietary
Specifications
- Parameters
- Unreleased
- Architecture
- Undisclosed proprietary architecture
- License
- Proprietary
- Context Window
- 400,000 tokens
- Max Output
- 272,000 tokens
- Training Data Cutoff
- Sep 30, 2024
- Type
- multimodal
- Modalities
- textimage
Benchmark Scores
Advanced Specifications
- Model Family
- GPT-5
- API Access
- Available
- Chat Interface
- Not Available
- Variants
- gpt-5-pro-2025-10-06
Capabilities & Limitations
- Capabilities
- deep reasoningcodemathvision
- Known Limitations
- Can produce incorrect factual claims or code; important results require independent verification.Higher compute can increase response latency to several minutes.
- Notable Use Cases
- difficult research questionsmathematical reasoningtechnical analysis
- Function Calling Support
- Yes
- Tool Use Support
- Yes