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v2026.11,986 entries · CC-BY 4.0
NIKOLAI elementN3 · Thresholds and checkpointsProposednikolai-v0.3

Safety Margin

Definition

A safety margin is a deliberate allowance between a model's measured capability or risk and the level at which a safety threshold would be breached. It is set to cover uncertainty, such as evaluations that under-estimate a model, fast capability progress between tests, or safeguards that may fail.

Also called: Safety buffer, Margin of security, Buffer

NIKOLAI's proposed operational definition

NIKOLAI proposal: a safety margin is the allowance a developer builds in between a model's measured capability or risk and the point at which a threshold or acceptance criterion would be breached, recorded with its form (a lower cut-off, a time or compute buffer before the next test, or an unquantified judgment), its value where disclosed, and the uncertainties it is meant to cover.

The operational definition is CASRAI's own proposal, not a definition any named organisation has agreed to. See what NIKOLAI is and is not, or browse the AI safety glossary.

Examples

Examples from published documents

  • Google DeepMind sets the ML R&D automation cut-off at 90% of benchmark challenges rather than the theoretical 100% (Gemini 3.7 Flash FSF report, p.4)
  • The EU Code requires the margin to take into account uncertainties of "systemic risk sources (e.g. capability improvements after the time of assessment)" as well as of assessments and mitigations (EU GPAI Code of Practice, Safety and Security chapter, Measure 4.1)
  • Anthropic's earlier policy specified "creating a 6× buffer" in its testing methodology before RSP v2.0 replaced it with more general requirements (Anthropic RSP v3.4, changelog)

Counter-examples

Not to be confused with

  • Elicitation effort, meaning how hard evaluators try to draw a capability out of a model, reduces under-estimation directly; a safety margin is the allowance kept for whatever under-estimation remains.

Source of record

Where this definition comes from

Crosswalk

How named organisations use this concept

Every row below is a shadow mapping. A shadow row is CASRAI's own reading of a published document. No lab, evaluator or regulator named on a shadow row has declared, endorsed, or been consulted on it. That changes only when an organisation files its own Mapping Declaration.
OrganisationTheir term, as publishedMatch & verificationSource
Google DeepMindShadow mapping
Gemini 3.7 Flash FSF report / Gemini 3.1 Pro model card
“Safety margin: "a model theoretically needs to complete 100% of the benchmark challenges to reach the CCL, but we conservatively set our safety margin at 90%" (report p.4). Safety buffer: "Our frontier safety strategy is based on a 'safety buffer' to prevent models from reaching critical capability levels (CCLs), i.e. if a frontier model does not reach the alert threshold for a CCL, we can assume models developed before the next regular testing interval will not reach that CCL." (model card, Frontier Safety)”exactEQ
confidence: high
Gemini 3.7 Flash FSF report
EUShadow mapping
EU GPAI Code of Practice, Safety and Security chapter
“Measure 4.1: Signatories apply acceptance criteria "incorporating a safety margin (as specified in the following paragraph)". "The safety margin will: (1) be appropriate for the systemic risk; and (2) take into account potential limitations, changes, and uncertainties of: (a) systemic risk sources (e.g. capability improvements after the time of assessment)". Measure 7.2: the Model Report includes "details of the safety margins incorporated".”exactEQ
confidence: high
EU GPAI Code of Practice, Safety and Security chapter
xAIShadow mapping
xAI Frontier AI Framework (30 Jun 2026)
“"xAI applies a systemic risk acceptance criteria to each identified risk, incorporating a margin of security, to determine whether each identified systemic risk and the overall systemic risk are acceptable" (s.2.3). "In assessing whether to accept residual risk, we review the risk tiers for each systemic risk category and incorporate appropriate safety margins." (s.2.3)”
Margin named but not quantified. PDF metadata /Title reads "Privileged/Confidential DRAFT working FRAMEWORK DOC"; no xAI statement disambiguating draft vs. final was found.
exactEQ
confidence: medium
xAI Frontier AI Framework (30 Jun 2026, draft-marked)
AnthropicShadow mapping
Responsible Scaling Policy v3.4 (changelog entry for RSP v2.0)
“"We have replaced some specifics in our previous testing methodology (e.g., using 1% of compute for elicitation or creating a 6× buffer)"; "the science of evaluations is not currently mature enough to make confident predictions about the precise buffer we should require between current models and a Capability Threshold." (Changelog, RSP v2.0)”
Historical: describes the RSP v2.0 change away from a fixed numeric buffer; RSP v3.0 was a comprehensive rewrite.
closeCL
confidence: high
Anthropic Responsible Scaling Policy v3.4
What do these codes mean?
exact
The source term is equivalent to this element
close
The source term is close but not equivalent to this element
broad
The source term is broader than this element
narrow
The source term is narrower than this element
none
No mapping claim — used for false-friend and declared-but-undefined rows
EQ
Equivalent
CL
Close
BR
Source is broader than the element
NR
Source is narrower than the element
FF
False friend — same or similar label, different meaning
DU
Declared but undefined by the source
UV
Unverified

Related, not mapped

Pointers that are not crosswalk claims

These sources mention this concept but do not define or map it clearly enough to count as a crosswalk row — noted here so the research is visible without overstating it as a mapping.

  • Microsoft

    A heading in the framework (p.8) refers to a "safety buffer", but the text under it describes re-evaluating models after mitigation rather than a defined margin.

    Microsoft Frontier Governance Framework (Feb 2026)
  • OpenAI

    The Frontier Governance Framework treats models as having crossed a threshold when it is "unable to rule out" that they have (§2.3); that precautionary rule is recorded under threshold-status.

    OpenAI Frontier Governance Framework

Divergence

Where sources materially disagree

"Safety buffer" and "safety margin" are used for different allowances. Google DeepMind's safety buffer is a gap in time and capability between an alert threshold and the next scheduled test; its safety margin, like the EU Code's, is a lower cut-off or allowance applied at the decision itself. Anthropic once used a numeric buffer (6× effective compute) and replaced it with more general requirements because the science of evaluations was not mature enough to set a precise buffer.

Gap

Among the current frameworks reviewed, CASRAI found one published numeric margin, Google DeepMind's 90% figure for ML R&D automation; the EU Code requires margins to be explained in Model Reports, which are not public, and xAI names margins without values.

Referenced across the research world

University of Cambridge logoColumbia University logoCrossref logoUniversity of Edinburgh logoHarvard University logoUniversity of Oxford logoPrinceton University logoStanford School of Medicine logoUniversity College London logoORCID logoUniversity of Cambridge logoColumbia University logoCrossref logoUniversity of Edinburgh logoHarvard University logoUniversity of Oxford logoPrinceton University logoStanford School of Medicine logoUniversity College London logoORCID logo
  • University of Cambridge logo
  • Columbia University logo
  • Crossref logo
  • University of Edinburgh logo
  • Harvard University logo
  • University of Oxford logo
  • Princeton University logo
  • Stanford School of Medicine logo
  • University College London logo
  • ORCID logo

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