Agent Identity Evals: Measuring Agentic Identity
On the map: LLM agents and tool use → General LLM agent frameworks and benchmarks
Abstract (arXiv)
Central to agentic capability and trustworthiness of language model agents (LMAs) is the extent they maintain stable, reliable, identity over time. However, LMAs inherit pathologies from large language models (LLMs) (statelessness, stochasticity, sensitivity to prompts and linguistically-intermediation) which can undermine their identifiability, continuity, persistence and consistency. This attrition of identity can erode their reliability, trustworthiness and utility by interfering with their agentic capabilities such as reasoning, planning and action. To address these challenges, we introduce textitagent identity evals (AIE), a rigorous, statistically-driven, empirical framework for measuring the degree to which an LMA system exhibit and maintain their agentic identity over time, including their capabilities, properties and ability to recover from state perturbations. AIE comprises a set of novel metrics which can integrate with other measures of performance, capability and agentic robustness to assist in the design of optimal LMA infrastructure and scaffolding such as memory and tools. We set out formal definitions and methods that can be applied at each stage of the LMA life-cycle, and worked examples of how to apply them.
Key facts. Cited by 5 papers in the map (data through 14 Oct 2026). Placed in General LLM agent frameworks and benchmarks, one of 16 directions in LLM agents and tool use. Builds on 49 of its 80 references that are in the map. First posted on arXiv 23 Jul 2025.
Builds on
49 of 80 references.
Closest ancestors · 6
Same direction, newest first
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Other references · 43
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Built on by
Citing papers per year: 2026: 5.
5 papers.
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- 2026Identity Is More Than Recall: A Benchmark for Persistent Identity in Deployed AI Agentscited by 0
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- 2026Runtime-Independent Persistent Agents: Preserving Identity, Memory, and Code Across Models, Harnesses, and Servers1 Sep 2026
- 2026Measuring What Persists: Conditioning Mechanisms and a Geometric Framework for AI Agent Identity20 Jun 2026
- 2026Dissociative Identity: Language Model Agents Lack Grounding for Reputation Mechanisms28 May 2026
- 2026The AI Accountability Ecosystem in the Era of Language Models29 Apr 2026
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