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Reading / 2026-05/2026-05-08t175639-can-llms-model-real-world-systems-in-tla

Can LLMs model real-world systems in TLA+?

SysMoBench benchmarks leading LLMs on generating TLA+ specs from real system code, finding near-perfect syntax scores but only ~46% conformance and ~41% invariant scores, revealing that LLMs recite textbook protocols rather than faithfully modeling actual implementations.

May 08, 2026 · tech · Qian Cheng, Ruize Tang, Emilie Ma, Finn Hackett, Peiyang He, Yiming Su, Ivan Beschastnikh, Yu Huang, Xiaoxing Ma, and Tianyin Xu, SIGOPS

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Topics

  • benchmarks
  • distributed-systems
  • ai-assisted-coding
  • llm-engineering
  • software-architecture

Cited by

  • AI-assisted coding

    Using LLMs as coding collaborators spans a spectrum from inline suggestion to fully autonomous multi-agent pipelines, with active debate about reliability, skill atrophy, security exposure, and what human oversight must remain.

  • Benchmarks

    Benchmarks measure model or system capability, but their results are only as meaningful as their design — a recurring problem across LLM, multi-agent, and vision tasks, where tests built for one context are routinely applied to contexts they cannot capture.

  • Distributed systems

    Distributed systems problems — coordination, state management, failure recovery, and observability — recur across cloud infrastructure, durable execution, multi-agent AI, and formal verification research.

  • LLM engineering

    LLM engineering spans the full stack of building with large language models: training, inference optimization, agent architecture, harness design, and the operational tradeoffs that determine whether model capability translates into reliable software.

  • Software architecture

    Software architecture shapes how systems behave under pressure, how teams reason about codebases, and how much complexity accumulates over time — spanning module design, state management, deployment topology, and the feedback loops that keep all three honest.

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