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GPT-5.4 Thinking

by OpenAI

AI Model
Low Confidence

GPT-5.4 Thinking is OpenAI’s reasoning model, released in March 2026 and designed for complex, multi-step professional tasks requiring deep analysis, long context, and reliable execution.

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Transparency Score

Weighted across four pillars · updated May 5, 2026

Overall grade
84% weighted
ABCDF
Model
—
Not yet assessed
Infrastructure
—
Not yet assessed
Openness Assessment
50%Partially Open
6 Open
2 Partial
6 Closed
Availability
2/5 Open
Documentation
4/6 Open
Access Methods
2/3 Open
Data from EU Open Source AI Index (DOI: 10.5281/zenodo.15386042), licensed under CC-BY 4.0

Vendor Information

Complete information about the vendor/provider of this AI application

OpenAIView all products →
OpenAI Global, LLC(Trading as: OpenAI)
Contact Information
openai.com/
support@openai.com
+1 800-485-2860
Registered Address
1455 3rd Street, San Francisco, CA, 94158, US

EU AI Act Provider Information

Verification Status:
Partially Verified
OpenAI Global, LLC(Trading as: OpenAI)
1455 3rd Street, San Francisco, CA, 94158, US
support@openai.com+1 800-485-2860
OpenAI Ireland Ltd
The Liffey Trust Centre 117-126 Sheriff Street Upper, Dublin, IE
Compliance Documents
CE Marking: Pending
Instructions for Use
Available in EU Member States
🇦🇹AT🇧🇪BE🇧🇬BG🇭🇷HR🇨🇾CY🇨🇿CZ🇩🇰DK🇪🇪EE🇫🇮FI🇫🇷FR🇩🇪DE🇬🇷GR🇭🇺HU🇮🇪IE🇮🇹IT🇱🇻LV🇱🇹LT🇱🇺LU🇲🇹MT🇳🇱NL🇵🇱PL🇵🇹PT🇷🇴RO🇸🇰SK🇸🇮SI🇪🇸ES🇸🇪SE
OpenAI conducts ongoing safety testing, external red teaming, and post-deployment monitoring as part of its internal compliance and risk management approach.
Compliance with the full EU AI Act requirements is an active and evolving process; public documentation may be high-level until formal conformity submissions are completed.

Potential Risks

1 considerations identified

1

Review recommended before use

These considerations are automatically identified based on publicly available information about the vendor and AI catalog data. Actual risks may vary based on your specific use case and implementation.

Supply Chain Network

Visual representation of the vendor's digital supply chain relationships

Compliance & Risk

Get insights into risk by running assessments on this AI application.

Work at OpenAI? Claim this listing to correct or complete the data.

Added: April 16, 2026
Updated: May 5, 2026

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