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InfiniteMem – deterministic episodic memory, LoCoMo 70.49

InfiniteMem, a deterministic, self-hosted episodic memory system for AI agents, reports a LoCoMo QA score of 70.49% and claims a capacity of 1 million episodes or 145 million tokens per deployment, roughly 1,130 times a GPT-4o context window. The system, which is closed source and uses an MCP server for integration, is detailed in a repository by marcot3ssar1, with evaluation scripts and results available for reproducibility.

read1 min views1 publishedSep 3, 2026
InfiniteMem – deterministic episodic memory, LoCoMo 70.49
Image: Michielbdejong (auto-discovered)

Deterministic, self-hosted episodic memory for agents (K3 engine): 1M episodes / 145M tokens per deployment — ~1,450 novels, ~1,130× a

GPT-4o context window, ~27 years of chat. Details: CAPACITY.md. LoCoMo QA 70.49% under equal protocol, reproducible evaluation glue. No implementation sources are included by design. Closed source — see NOTICE.

Try it: an MCP server with a free trial is coming — run infiniteMem from Claude Desktop and your agents without sharing data externally. Contact via repository for trial access.

paper/

— scientific report v2 (LoCoMo + LongMemEval, stronger-reader rows, world-model gate, reranker study, limits, references).harness/

— evaluation scripts only (dataset fetch checks, fresh embedding via NVIDIA API, numpy retrieval crosscheck, QA answer+judge via OpenRouter, rerank gate). They drive the closed engine as a black box and reveal nothing about its internals.results/

— certified numbers:leaderboard.json

(LoCoMo, SOTA2-ready),`leaderboard_lmem.json`

(LongMemEval-S),`readers.json`

(stronger-reader rows + world-model gate), per-question`qa_cache.jsonl`

(3070 records, no gold texts), retrieval and QA reports, reranker negative-result report.

  • Fetch snap-research/locomo

data/locomo10.json

(CC BY-NC 4.0, non-commercial, cite Maharana et al., ACL 2024) and verifySHA256 79FA87E9…

. - Set env keys (never commit): NVIDIA_API_KEY

(embeddings`llama-nemotron-embed-vl-1b-v2`

, 768-D, passage`Speaker: text`

/ query raw) andOPENROUTER_API_KEY

(answer+judge`openai/gpt-4o-mini-2024-07-18`

, temp 0, verbatim Mem0 prompts). - Run harness in order:

exnovo_embed.py

eval_fresh_retrieval.py

→`exnovo_qa.py --mode k3`

+`--mode oracle`

. Expected: retrieval78.85/74.10

, QAk3 70.49 / oracle 84.89

(±0.5pp API variance). Black-box engine, brute top-10 single-shot, dedup off, no rerank, 1 run. Answer/judge models and prompts pinned (see paper §3, §6). Dataset CC BY-NC 4.0. Contact via repository for engine access.

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