GPT-5.4 Pro
GPT-5.4 Pro is the higher-compute GPT-5.4 tier for difficult professional and technical questions. It shares the documented text and image interface and expanded API context but spends more reasoning computation for stronger answers. Responses API background execution accommodates long-running requests. It is a distinct API tier rather than a dated snapshot of GPT-5.4.
2026-03-05
Unreleased
Undisclosed proprietary architecture
Proprietary
Specifications
- Parameters
- Unreleased
- Architecture
- Undisclosed proprietary architecture
- License
- Proprietary
- Context Window
- 1,050,000 tokens
- Max Output
- 128,000 tokens
- Training Data Cutoff
- Aug 31, 2025
- Type
- multimodal
- Modalities
- textimage
Benchmark Scores
Advanced Specifications
- Model Family
- GPT-5
- API Access
- Available
- Chat Interface
- Not Available
- Variants
- gpt-5.4-pro-2026-03-05
Capabilities & Limitations
- Capabilities
- deep reasoningcodevisiontool use
- 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
- complex researchtechnical reviewdifficult quantitative analysis
- Function Calling Support
- Yes
- Tool Use Support
- Yes