Comparison · Verified as of July 2026
Best AI RPG with long-term memory (2026)
The best AI RPG for long-term memory is Creation OS: it is the only one with a public, auditable record of a single world played past turn 5,000, sealed at turn 5,011 for anyone to open and try to break. Companion apps like Kindroid and Nomi remember a one-to-one chat well, and NovelAI holds a large context you curate by hand, but none of them publishes a readable long-run record. Verified as of July 2026, first world free, no card.
The short answer:
- For a whole campaign that stays consistent across sessions: Creation OS, the only one with a public record verified past turn 5,000.
- For a private one-to-one companion you chat with daily: Kindroid or Nomi, both built around long-term companion memory.
- For one long scene you curate by hand: NovelAI, with a large context and Lorebook fields you fill in yourself.
- The dividing line: everyone claims long-term memory; only Creation OS hands you a record you can read and check.
The comparison, by long-term memory
Here is how long-term memory holds up, tool by tool, ordered by how much public evidence of a long run each one offers, from least to most. Each competitor cell is a documented detail drawn from the platform's own docs or a public review, dated 2026, not our opinion of it. Only the last row links to a run you can inspect.
| Platform | What it counts as long-term memory | The number it publishes (source) | Readable long run? |
|---|---|---|---|
| NovelAI | A larger context with Memory, Lorebook, and Author's Note fields you curate by hand. | Up to roughly 28,000 tokens on its top tier. Published tests report story details drifting around turn 35. (NovelAI docs; published tests, 2026.) | Third-party tests, tens of turns. |
| Kindroid | An AI companion app with layered memory its docs call Persistent, Cascaded, and Retrievable, plus a journal. | Large character budgets by tier (roughly 500K to 2.8M characters) and a journal capped at 500 entries, a few pulled into any given reply. No campaign-length benchmark. (Kindroid help docs, 2026.) | Private, per user. No public record. |
| Nomi | An AI companion app marketing “Human-Level Memory” across short, medium, and long term. | No numeric recall figure published by Nomi. Third-party reviews report it holds the majority of seeded facts in informal month-long tests. (nomi.ai; third-party reviews, 2026.) | Private and encrypted, per user. No public record. |
| Questsmith | A solo AI text RPG with a “Persistent Memory” engine sold as tier-capped Memory Slots. | Its launch announcement advertised up to 500 tracked memories per adventure; the current pricing page lists Memory Slots topping out at 200 on the highest tier, with context from 4,000 to 32,000 tokens. (Questsmith launch PR and pricing page, 2026.) | Users publish scenarios, not playthroughs. No public long run. |
| Friends & Fables | An AI game master (Franz) with automated long-term campaign memories, searched and brought in only when the system deems them relevant. | Marketed for months-long campaigns; long-term memory described as relevance-gated in its help documentation. (fables.gg help doc, 2026.) | Product claim; no published long-run record. |
| Creation OS | World state kept on our servers as a standing record the Narrator reads but cannot overwrite. | Every world keeps the same record from its first turn, no fixed cutoff. The furthest public verification: a campaign sealed at turn 5,011 (2026-06-26), cast, factions, quests, and locations still on file. (Open the record.) | Yes. Open it and try to break it. |
Verified as of July 2026. Competitor features and pricing move fast, so treat the specifics as a dated snapshot.
Why the published numbers are so different
The numbers above do not line up because the tools are not measuring the same thing. A companion app measures whether it remembers you: your backstory, your running jokes, the shape of one relationship. A chat-based story tool measures how much text it can hold in context at once. Both are real forms of memory, and Kindroid, Nomi, and NovelAI are genuinely good at them.
An AI RPG with long-term memory is a harder problem, because it has to remember a whole world: who owes whom, what you own, which faction you crossed, and where every thread stands, all still adding up hundreds or thousands of turns later. Kept inside a model's context window, that strains as the window fills and older details get compressed. So rather than assert that ours holds, we let one ordinary campaign keep going, past turn 5,000, and published the whole thing. That is the difference between a claim and a receipt, and it is the one column in the table above a competitor cannot currently fill.
What long-term memory actually means in an AI RPG
Long-term memory in an AI RPG is not one feature, it is three promises that all have to hold at once. First, it should survive between sessions, so closing the tab for a week does not reset the world. Second, it should stay mechanical, so an NPC who owes you a debt still owes it later even if nobody mentions it for a hundred turns. Third, it should be checkable, so you are not just trusting a marketing line.
Creation OS keeps the world's facts on our servers, in a standing record the Narrator reads each turn but cannot overwrite. A debt from turn 40 does not need to survive in the chat window to still be owed at turn 4,000; it is on the books either way. When we say verified, we mean the server's own records at turn 5,011 were checked against the start of the run and were all still on file, nothing lost. The check is mechanical. The narration is still a narrator and can phrase a moment loosely; the record underneath is what does not move.
How to check any of these yourself
You do not need our word for any of it. Test any AI RPG or companion app the same way, ours included.
- Set a specific fact early. A debt you owe, a name you were given, a promise you made.
- Play a long stretch, long enough that the early scene has scrolled far out of view.
- Leave, then come back. Close the tab for a day. Memory that survives only one sitting is not long-term memory.
- Ask about the fact. If the world answers without being reminded, the memory is real. If you have to re-teach it, it drifted.
For a full walkthrough that runs this across several tools, see the AI RPG memory test. For the ranked memory table across the story-game field, see which AI RPG has the best memory.
How we source these numbers
Every competitor figure here comes from the platform's own documentation or a public review, dated 2026, and is framed as a documented detail rather than a verdict on the product. These tools are actively improved, and a memory number from one snapshot is not a permanent ceiling. For our own product we make one claim, a record past turn 5,000, and we publish the receipt alongside it, so nothing on this page asks for faith.
Questions people ask
What is the best AI RPG with long-term memory?
For a whole campaign that has to stay consistent across sessions, Creation OS is the only one with a public record of a world played past turn 5,000, sealed at turn 5,011 and verified July 2026, that you can open and try to break. Companion apps like Kindroid and Nomi have strong memory for one-to-one chat, and NovelAI holds a large context you curate by hand, but none publishes a readable long-run record you can inspect.
Open the record ▶Do AI companion apps like Kindroid and Nomi remember long-term?
Yes, within their design. Kindroid documents layered memory it calls Persistent, Cascaded, and Retrievable plus a journal, and Nomi markets Human-Level Memory across short, medium, and long term. They are built for a private, ongoing one-to-one relationship, not a whole world with a cast, an economy, and quests that all have to keep adding up. For that job you want world state kept outside the chat, which is what Creation OS does.
Which AI RPG can actually prove its long-term memory?
Most publish a claim, not a receipt. Creation OS let one ordinary campaign run to turn 5,011, then sealed and published the full record: cast, factions, quests, and locations still on file. You can page through it and look for a contradiction yourself instead of taking the marketing on faith. No competitor currently links a comparable long-run record.
See the proof ▶Is a bigger context window the same as long-term memory?
No. A larger context holds more text at once, but it still fills up over a long campaign, and models can lose details in the middle of a long stretch. That is why a tool can advertise a huge context and still drift late. Long-term memory that lasts a whole campaign needs facts kept outside the chat window, in a standing record, which is how Creation OS is built.
What is the difference between an AI companion and an AI RPG with memory?
A companion app is built to remember you, one relationship, across chats. An AI RPG with long-term memory has to remember a world: who owes whom, what you own, which faction you crossed, and where every thread stands, across hundreds to thousands of turns. Kindroid and Nomi are excellent at the first job. Creation OS is built for the second, with a public record verified past turn 5,000.
How many turns can an AI RPG actually remember?
It varies. Published tests of chat-based tools show story details drifting within dozens of turns, for example NovelAI around turn 35. Companion apps recall a large share of seeded facts in informal month-long tests but publish no campaign-turn benchmark. The furthest public, auditable figure in the category is Creation OS at turn 5,011, where the world's records were still intact.
Read the record ▶How do I test long-term memory in an AI RPG myself?
Set a specific fact early, a debt, a name, a promise. Play a long stretch, close the tab for a day, then come back and ask about that fact. If the world answers without being reminded, the memory is real. Our step-by-step guide runs the same test across several tools so you never have to take a claim on faith.
Run the memory test ▶THE ONE LONG RUN YOU CAN READ
First world free. No card.