Fifth Element actress Milla Jovovich and crypto CEO Ben Sigman have released MemPalace, an open-source AI memory system that has accumulated 32,958 GitHub stars since its April 5, 2026 launch. The Python-based tool stores conversation history verbatim in a local ChromaDB database, claiming a 96.6% R@5 score on the LongMemEval benchmark — though the creators have since acknowledged overclaimed features in a candid README update.
Origin Story: From AI Amnesia to Open Source
According to the project's origin story on mempalace.tech, Jovovich began using AI intensively in late 2025 but encountered persistent "AI amnesia" problems where assistants would lose conversation context. Rather than accept this limitation, she partnered with Sigman to build a solution. The system uses a "memory palace" metaphor inspired by the ancient method of loci technique: conversations are stored in wings (people/projects), divided into rooms (topics), connected by halls (memory types like decisions, events, preferences) and tunnels (cross-wing connections).
Technical Architecture and Honest Corrections
MemPalace runs entirely offline without external APIs, using ChromaDB locally with SQLite for the knowledge graph. The system's headline metric claimed "96.6% R@5 on LongMemEval in raw mode, on 500 questions, zero API calls."
However, in an April 2026 README update, the creators candidly acknowledged significant overclaims:
- AAAK compression "currently regresses LongMemEval vs raw verbatim retrieval (84.2% R@5 vs 96.6%)"
- Token savings were overstated — AAAK "does not save tokens at small scales"
- The "+34% palace boost" reflects standard metadata filtering, not novel retrieval innovation
- Contradiction detection exists but isn't yet integrated into the system
This transparency is unusual in product launches and distinguishes MemPalace from typical startup hype cycles.
Media Coverage and Community Skepticism
The project attracted significant media attention, with Decrypt publishing "Fifth Element Star Milla Jovovich Reveals AI Memory Tool MemPalace" and Kotaku running "Resident Evil Star's AI-Coded Tool Accused Of Being Snake Oil." Cybernews covered the benchmark controversy with "Milla Jovovich creates MemPalace AI memory tool with 'perfect score' on benchmark, but devs aren't buying it."
Community reactions were mixed. Critics questioned both the benchmark claims and Jovovich's actual technical involvement. One developer noted: "The real problem isn't MemPalace specifically. It's conceptual. Most AI memory systems — MemPalace, Mem0, Zep — treat memory as a retrieval problem: store everything, index it, fetch what's relevant. That's not how memory works. Memory is not a database lookup."
Open Source Commitment
Despite the controversy, MemPalace is fully open-sourced under an MIT license. The creators explicitly welcomed community criticism and committed to fixing overstated claims rather than defending them. This approach — combining celebrity visibility with technical transparency about limitations — represents an unusual entry point for mainstream figures into open-source AI infrastructure.
Key Takeaways
- MemPalace has accumulated 32,958 GitHub stars since launching April 5, 2026, making it one of the fastest-growing AI memory projects
- The system uses ChromaDB and SQLite to run entirely offline, storing conversation history verbatim rather than summarizing
- Creators acknowledged in April 2026 that AAAK compression regresses benchmark performance from 96.6% to 84.2% R@5 on LongMemEval
- The project is fully open-sourced under MIT license with Python codebase
- Media coverage ranged from positive (Decrypt) to skeptical (Kotaku's "Snake Oil" headline), reflecting divided community reception