Diff - memory system - inZOI Wiki

11 Overview

33 The Memory System in inZOI combines the currently implemented Smart Zoi AI (which drives autonomous behavior and inner thoughts) with a planned Event Memory and Diary system announced on the 2026 roadmap. The Smart Zoi features described below are available in the current Early Access version, while the diary and event memory recording features are planned for a future update. Working in tandem with the Smart Zoi AI, the system creates a feedback loop where a Zoi's history influences their future decisions, Emotions, and daily routines. The Smart Zoi feature uses a 0.5 billion parameter Mistral NeMo Minitron small language model (SLM) powered by NVIDIA ACE (Avatar Cloud Engine) technology, running entirely on-device with no server dependency.

55 How Smart Zoi Works

77 Throughout each in-game day, the Smart Zoi AI tracks significant events, interactions, and experiences that a Zoi encounters. The system processes:

1010 Important social interactions such as conversations, conflicts, and romantic momentsCareer milestones including promotions, job changes, and notable work eventsFamily events like births, weddings, and deathsEmotional highs and lows throughout the daySkill achievements and personal accomplishments

1111

1212 Each Zoi is powered by over 400 distinct mental traits, Needs, and Karma values that enable autonomous decision-making, dynamic Relationships, Rumor propagation, and real-world consequences. The player-facing trait system uses 18 Traits divided into 6 categories based on Enneagram personality types, but the underlying AI model works with a much larger set of internal behavioral parameters.

1313

1414 Inner Thoughts

1515

1616 The Inner Thoughts display shows what a Zoi is currently thinking. Visual thought bubbles appear above Zois during conversations and interactions, while players can also click an Inner Thoughts button near the Zoi's profile icon to see a more detailed text description of the Zoi's current thought process.

1717

1818 Inner thoughts may reveal a Zoi's reflection on their life, specific reactions to music playing nearby, their comprehension of a book they are reading, or deeper feelings during a conversation. They also appear during meaningful moments such as marriage, childbirth, and aging up to a new life stage.

1919

2020 Updates to Inner Thoughts

2121

2222 VersionChangev0.3.0Inner thoughts now trigger after actions rather than during, providing more natural emotional flow. They also appear after witnessing others' actions, and some thoughts can now lead to autonomous actions.v0.5.0Thought bubbles are now only displayed for Zois in certain relationships with the player's current Zoi, including romantic and adversarial relationships, to reduce visual clutter.

2323 The amount of Inner Thoughts displayed on screen can be minimized through the settings menu to reduce visual clutter further.

2424

2525 The Diary System

2626

2727 At the end of each in-game day (past 11 PM, when the Zoi is sufficiently tired), Zois write their own diary reflecting on the day's events. The diary is generated by the Smart Zoi AI and captures the Zoi's personal perspective on what happened, combining input from their Inner Thoughts and events that occurred throughout the day. Each diary entry reflects the Zoi's unique Traits, Values, and personality. Discoveries and new realizations can emerge during the diary-writing process.

2828

2929 The Diary App exists on the Zoi's smartphone, though player access to reading full diary entries is still being refined in Early Access. The diary system is disabled at 5x game speed or higher, and schedule creation may fail if a Zoi sleeps too late. Multiple Zois (5 or more) writing diaries after 11 PM can cause performance lag.

3030

3131 Behavioral Adaptation

3232

3333 After diary writing, the Smart Zoi AI analyzes the Zoi's thoughts, feelings, and events to generate a new schedule for the following day. Players can view this schedule via the Calendar App on the smartphone. This means a Zoi's daily routine naturally evolves over time:

3434

3535 Positive experiences with a particular activity may lead the Zoi to seek it out more oftenNegative social interactions may cause a Zoi to avoid certain other ZoisCareer stress might lead to prioritizing fun and relaxation activitiesStrong emotional events can shift a Zoi's priorities and Values over timeRecent memories between Zois influence conversation context and dialogue choices; positive memories lead to positive interactions while negative memories lead to negative ones

3636

3737 Some events that a Zoi personally experiences may remain as trauma and restrict certain behaviors. For example, a Zoi who experienced a fire may become anxious around stoves.

3838

3939 The Zoi Pen

4040

4141 The Zoi Pen is a text input tool that lets players directly influence a Zoi's personality, thoughts, and behavior by writing custom prompts. The input has a maximum of 100 words, with 20 words being the recommended length for best results.

4242

4343 How It Works

4444

4545 Zoi Pen input directly influences Inner Thoughts, diary content, and next-day schedule generation. The input should contain thematic or abstract elements rather than direct action commands. For example, writing "You are slowly realizing your world is fake" creates more interesting behavior than "Go cook dinner."

4646

4747

4848 Verified Examples from Players

4949

5050 Zoi Pen InputResulting Behavior"You are a clean freak"The Zoi performed significantly more autonomous cleaning actions"Secretly has a crush on [Zoi name]"The character autonomously sought more social interaction with that specific NPC"Only wants and can flirt with his wife"The husband rejected romantic advances from other charactersDetailed author-themed personality descriptionThe Zoi produced "excellent" rated books

5151 Known Limitations

5252

5353 Some actions like cooking are hard-coded and will never be done autonomously regardless of Zoi Pen promptsNeeds still take priority over personality prompts; new behaviors may take time to manifestGrammar, spelling, and language quality matter because the SLM may misinterpret misspelled text

5454

5555 Player Settings

5656

5757 Smart Zoi can be configured through several settings:

5858

5959 SettingDetailsEnable/DisableToggle Smart Zoi on or off in the Gameplay tab under "Experimental" in the Options MenuPer-Zoi ToggleA prompt near the Zoi's profile icon allows toggling Smart Zoi for individual ZoisRangeCan be limited to individual Zois, the player's family, or all Zois in the city (up to 300 maximum)Queue LimitRecommended limit of 8 Smart Zois visible on screen for optimal performanceSpeed RestrictionInner thoughts, diary writing, and scheduling are disabled at 5x game speed or higher

6060 Technical Requirements

6161

6262 The Smart Zoi AI uses a 0.5 billion parameter model running locally on the GPU, consuming approximately 1 GB of VRAM. It currently requires an NVIDIA GeForce RTX graphics card. Enabling Smart Zoi automatically reduces graphics settings by one tier to accommodate the VRAM usage. AMD GPU support is planned but has no confirmed release date.

6363

6464 TierGPUVRAMRAMMinimumRTX 30608 GB12 GBMediumRTX 40608 GB16 GBRecommendedRTX 5070 / 4070 Super12 GB16 GBHighRTX 5070 Ti / 4080 Super16 GB32 GB

6565 On macOS, the system uses Apple's Core ML framework. Smart Zoi is disabled for NVIDIA GeForce 10 Series cards. Currently limited to human Zois only; animals and other creatures are excluded.

6666

6767 Planned Improvements

6868

6969 The 2026 Roadmap includes significant expansions to the Memory System:

7070

7171 Q1 2026: Formalized memory system including trauma memories with lasting behavioral effects and life milestone memories with special significanceQ3 2026: Expanded Event Memory and Diary system with more structured memory types and richer diary entriesEnhanced grief reactions tied to relationship depth and shared memoriesKorean language model support (added in v0.5.0)

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