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The document states that the system card was amended after initial publication on April 24, 2026 to add disclosures specific to the deployment of GPT-5.5 and GPT-5.5 Pro through the API.
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This provision establishes that material API safeguard information was added to the system card after the model's initial release, which is operationally significant for API users who may have assessed deployment risks based on the original document. Compliance teams should confirm they are reviewing the April 24, 2026 version of the system card.
API users of GPT-5.5 or GPT-5.5 Pro should note that the system card governing their deployment context was updated after initial publication to include additional safeguard disclosures specific to the API setting. Users who reviewed the document prior to April 24, 2026 should review the updated version.
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"This card was updated on April 24, 2026, to include additional information about safeguards for the deployment of GPT‑5.5 and GPT‑5.5 Pro in the API.Excerpt from OpenAI's GPT-5.5 System Card
(1) REGULATORY LANDSCAPE: Post-publication amendments to safety disclosure documents may interact with AI incident reporting obligations and transparency requirements under the EU AI Act, which contemplates ongoing documentation obligations for high-risk AI systems. Regulatory bodies may assess whether the timing of the API safeguard disclosure was consistent with pre-deployment transparency expectations. (2) GOVERNANCE EXPOSURE: Medium. The post-publication update introduces a documentation versioning consideration for compliance teams. Organizations that conducted AI risk assessments based on the pre-update system card may need to re-evaluate their assessments to account for the additional API safeguard information. (3) JURISDICTION FLAGS: EU and UK regulators with active oversight of frontier AI models may assess the timing and completeness of safety disclosures. Organizations in these jurisdictions that integrated the API prior to the April 24, 2026 update face potential exposure if their pre-deployment risk assessments did not account for the subsequently disclosed API safeguards. (4) CONTRACT AND VENDOR IMPLICATIONS: Enterprise API agreements that reference this system card by version or date should be reviewed to confirm which version is incorporated by reference. Procurement teams should assess whether the post-publication API safeguard update triggers any contract amendment or re-assessment obligations under their vendor management policies. (5) COMPLIANCE CONSIDERATIONS: Compliance teams should verify they hold the April 24, 2026 version of the system card and assess whether the API-specific safeguard additions require updates to internal AI risk registers, data processing impact assessments, or vendor due diligence documentation.
This provision establishes that material API safeguard information was added to the system card after the model's initial release, which is operationally significant for API users who may have assessed deployment risks based on the original document. Compliance teams should confirm they are reviewing the April 24, 2026 version of the system card.
API users of GPT-5.5 or GPT-5.5 Pro should note that the system card governing their deployment context was updated after initial publication to include additional safeguard disclosures specific to the API setting. Users who reviewed the document prior to April 24, 2026 should review the updated version.
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