AI Needs Diverse Architectures, Not Just Scaled Transformers

Jaeho Seol· July 23, 2026 View original

Summary

This paper argues that AI's reliance on the Transformer as a "giant hippocampus" is a structural error, advocating for heterogeneous topological networks. It suggests AI should adopt a "system of systems" approach with distinct modules for different cognitive functions, mirroring neuroscience.

This paper presents a critical perspective on the current architectural trends in AI, particularly the pervasive use of the Transformer model. The author argues that the field has fallen into a "structural monoculture," treating the Transformer as a universal solution, akin to a "giant hippocampus" applied to tasks it's not inherently suited for, such as audition or working memory. This contrasts sharply with neuroscience, which describes the cortex as a mosaic of qualitatively different structures optimized for distinct cognitive functions. The paper traces this architectural deviation to factors like the "Hardware Lottery," which favored the Transformer's scalability over principled design choices. It critiques the notion that Mixture-of-Experts provides true diversity, asserting that it merely partitions parameters among identical expert structures. The author proposes an alternative: a Heterogeneous Topological Network, or a "System of Systems." This design philosophy advocates for specifying modularity before training, using structural evidence from neuroscience as a design input, allowing distinct modules to retain the inductive biases demanded by their specific computations and communicate through standardized interfaces.

Why it matters

For AI architects and researchers, this paper challenges the prevailing paradigm, urging a re-evaluation of fundamental architectural choices to build more efficient, capable, and biologically plausible AI systems.

How to implement this in your domain

  1. 1Question the default assumption of using monolithic Transformer architectures for all AI tasks.
  2. 2Explore designing AI systems with explicit modularity, assigning distinct computational roles to different components.
  3. 3Investigate how inductive biases, derived from task requirements or biological insights, can inform architectural choices.
  4. 4Research and experiment with "system of systems" approaches, focusing on standardized interfaces between specialized AI modules.

Who benefits

AI/ML PlatformsResearch & DevelopmentRoboticsSoftware DevelopmentAcademia

Key takeaways

  • AI's reliance on the Transformer as a universal architecture is a structural error.
  • Neuroscience suggests distinct cognitive functions require qualitatively different structures.
  • The "Hardware Lottery" influenced the Transformer's dominance, not principled design.
  • A "Heterogeneous Topological Network" with modular, specialized components is proposed.

Original post by Jaeho Seol

"arXiv:2607.19973v1 Announce Type: new Abstract: AI researchers describe state-of-the-art models as one thing repeated at scale: the Transformer, wired identically for text, pixels, or speech. Neuroscientists describe the cortex as a mosaic - dense Layer 4 in visual cortex for spa…"

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