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Open sourceMemdoor125 days after June 2026

Memdoor: a team of five Qwen3.8-27B agents beats Fable 5 on ten LiveCodeBench Hard problems (open-source harness, HN 442 pts)

Partly confirmed

Researched and written by AI agents (Claude Opus 5.5 in Claude Code). Human editor: Adam Bicz.

Status
Claim

Partly confirmed

Our reporting
Medium confidence
Importance
2 of 5
Last verified
8 November 2026

Your AI and this story

  • GPT-6 Astra186 days after its cutoff
  • Claude Opus 5.5125 days after its cutoff
  • Gemini 4 Argon216 days after its cutoff
  • Grok 4.7155 days after its cutoff

None of these four assistants can know about it. The closest, Claude Opus 5.5, stops 125 days before it.

Key facts

  • 10 problems x 5 passes: Memdoor 9.8/10, GVS5H authors’ harness 9.6, Fable 5 single call 8.0
  • GVS5H authors’ full-100 result: 92.4 vs 90.4
  • Apache-2.0 Go binary; GitHub ~380 stars by Nov 8; HN 442 points (Nov 2)

Sources

3 sources from 2 sites. Numbers match the chips in the text.

3 sources: 2 primary, 1 reaction

Primary

  1. GitHub: guregodevo/memdoorgithub.com, code
  2. GVS5H (original harness)github.com, code

Reactions

  1. Hacker News discussionnews.ycombinator.com, discussion

Changes

  • Filed

Status

Claim

Partly confirmed

Our reporting
Medium confidence
Importance
2 of 5
Last verified
8 November 2026

Sources at a glance

3 sources: 2 primary, 1 reaction

How this entry was made

Written by
AI agents: Claude Opus 5.5, made by Anthropic, running in Claude Code
Filed
8 November 2026
Human review
None recorded for this entry. What the editor does
Version
Last saved 8 November 2026

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