# AI Architecture Showdown: OpenAI vs Anthropic vs Plastic Lab

> Published on ADIN (https://adin.chat/s/architecture-comparison-openai-anthropic-plastic-labs-wx9z)
> Type: Diagram
> Date: 2026-03-11
> Description: Explore an interactive diagram comparing the system architectures of OpenAI, Anthropic, and Plastic Labs side by side.

Mermaid diagram:
flowchart TB
    subgraph OPENAI["OpenAI Architecture"]
        direction TB
        OAI_USER["User"]
        OAI_API["OpenAI API"]
        OAI_MODEL["GPT Model"]
        OAI_MEMORY["Memory (Platform Feature)"]
        OAI_CONTEXT["Context Window"]
        
        OAI_USER --> OAI_API
        OAI_API --> OAI_MODEL
        OAI_MODEL --> OAI_CONTEXT
        OAI_API --> OAI_MEMORY
        OAI_MEMORY -.->|"Injected into"| OAI_CONTEXT
        
        OAI_NOTE["Memory is:<br/>- Platform-controlled<br/>- Shallow key-value<br/>- Not reasoned over<br/>- Locked to OpenAI"]
    end

    subgraph ANTHROPIC["Anthropic Architecture"]
        direction TB
        ANT_USER["User"]
        ANT_API["Anthropic API"]
        ANT_MODEL["Claude Model"]
        ANT_CONTEXT["Context Window"]
        ANT_SYSTEM["System Prompt + Artifacts"]
        
        ANT_USER --> ANT_API
        ANT_API --> ANT_MODEL
        ANT_MODEL --> ANT_CONTEXT
        ANT_API --> ANT_SYSTEM
        ANT_SYSTEM -.->|"Prepended to"| ANT_CONTEXT
        
        ANT_NOTE["Memory is:<br/>- Developer-managed<br/>- No native persistence<br/>- Stateless by default<br/>- Context-window limited"]
    end

    subgraph PLASTIC["Plastic Labs Architecture"]
        direction TB
        PL_USER["User"]
        PL_HONCHO["Honcho Platform"]
        PL_IDENTITY["Identity Graph"]
        PL_MEMORY["Memory Store"]
        PL_NEURO["Neuromancer"]
        PL_FM["Any Foundation Model"]
        PL_CONTEXT["Enriched Context"]
        
        PL_USER --> PL_HONCHO
        PL_HONCHO --> PL_IDENTITY
        PL_HONCHO --> PL_MEMORY
        PL_IDENTITY --> PL_NEURO
        PL_MEMORY --> PL_NEURO
        PL_NEURO -->|"Reasons + Updates"| PL_HONCHO
        PL_HONCHO -->|"Enriched context"| PL_FM
        PL_FM --> PL_CONTEXT
        
        PL_NOTE["Memory is:<br/>- User-owned<br/>- Deeply structured<br/>- Actively reasoned over<br/>- Model-agnostic<br/>- Portable"]
    end

    %% Styling
    style OPENAI fill:#e8f5e9,stroke:#2e7d32