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GPT-5.4 Pro

OpenAIProprietaryPending Human Review

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

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