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In June 2026, the OpenAI models and Codex on AWS supplied the dated context for assessing shared responsibility. The announcement sets the external boundary. Your own evidence must establish whether the idea fits your organisation.

Decide how to handle shared responsibility

Proceed only after verifying Shared responsibility, Data path, Control inheritance, Provider dependency before selecting a design or provider.

Architecture should make constraints visible before implementation. Map data movement, trust boundaries, failure modes and reversibility before selecting a platform or model. Apply that rule to shared responsibility and data path.

Start with shared responsibility. That check determines which evidence will be useful for the other dimensions.

What the OpenAI models and Codex on AWS source contributes to shared responsibility

OpenAI models and Codex on AWS was reviewed on 27 August 2026 for its treatment of shared responsibility. Check the current source before a procurement, architecture or compliance decision. An announcement describes the offer or initiative. Your internal evidence determines whether it meets the need. This operational framework is not legal advice.

Examine shared responsibility, data path, control inheritance, provider dependency

1. Shared responsibility

For shared responsibility, record the current state, the owner and the decision that depends on this dimension. Keep the inventory limited to verifiable facts.

2. Data path

For data path, map the dependencies, data and affected people. Test any assumption that could invalidate the initiative before investing further.

3. Control inheritance

For control inheritance, choose observable evidence and a minimum threshold. The test should tell you whether to proceed; an impressive demonstration is not enough.

4. Provider dependency

For provider dependency, set the boundary, escalation path and exit condition. The team must be able to stop, replace or return the solution to manual operation.

Decision matrix for shared responsibility

Leadership, business, technology and security teams should assess the same evidence on shared responsibility and data path before deciding.

Test shared responsibility in five steps

1. Scope shared responsibility. Write down the question, owner and date by which an answer is required.
2. Establish the data path baseline. Measure the current process, including quality, incidents and review effort.
3. Test control inheritance. Limit data, users, permissions and duration so the change remains reversible.
4. Review provider dependency. Examine errors, manual rework, escalations and effects on affected people.
5. Answer the original question. Record proceed, change or stop, together with the evidence supporting that choice.

Evidence to retain for data path

The evidence pack keeps the findings on shared responsibility with the other material needed for the decision:

• the decision, its owner and consulted stakeholders;
• the inventory associated with shared responsibility;
• the baseline and test results for data path;
• the access, risks and approvals connected to control inheritance;
• the rollout, monitoring and exit plan for provider dependency.

If this initiative stops, retain its findings on shared responsibility and provider dependency so the next review does not repeat the same assumptions.

Mistakes that weaken control inheritance

Avoid:

• selecting a platform before mapping data and trust boundaries
• assuming a successful demo proves production feasibility
• ignoring reversibility, portability and failure containment

A 30-day plan for provider dependency

• Days 1 to 5. Name the owner of shared responsibility, define the boundary and collect available sources.
• Days 6 to 12. Map data path, including its data, access, dependencies and failure scenarios.
• Days 13 to 20. Test control inheritance against a baseline and pre-agreed stop criteria.
• Days 21 to 26. Ask the responsible functions to review the findings on provider dependency.
• Days 27 to 30. Compare the four findings with the decision above and define the next required proof.

Record the decision on shared responsibility

Keep a short record with the owner, evidence reviewed and decision. Add the condition that would trigger another review of shared responsibility or provider dependency.