Project EVE: Claude plays MMORPGs
Confirmed
The takeaway
Anthropic’s Frontier Red Team and Fellows published (6 Nov 2026) tests of Claude models trading in an EVE Online market simulator and playing EVE Frontier in four-agent teams.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- 3 of 5
- Last verified
- 7 November 2026
Your AI and this story
- GPT-6 Astra190 days after its cutoff
- Claude Opus 5.5129 days after its cutoff
- Gemini 4 Argon220 days after its cutoff
- Grok 4.7159 days after its cutoff
None of these four assistants can know about it. The closest, Claude Opus 5.5, stops 129 days before it.
Key facts
- Trading (replay of real Jita orders, 3B ISK start): Opus 4.7, 4.8 and Fable 5 profitable in all nine two-week windows, ~16%, ~22%, ~43% average; Opus 4.6 ~4%. Six-month runs: ~200% → ~600% of capital from Opus 4.6 to Fable 5
- Weaknesses: directional bets poor (Fable 5 profitable in ~half; Opus 4.7 lost consistently); slow to notice a tax change (Opus 4.7 median 2.5 days; 43% of Opus 4.6 agents never did); synthetic competitors cut profits ~35%
- EVE Frontier: best team (Fable 5) finished the tutorial within 12 hours without losing a ship; no team completed the warship objective
- Sabotage: only one honest agent, in one Opus 4.8 run, definitively identified the saboteur; limited-access monitors caught 30–40% at a 5% false-accusation rate (Opus 4.6–4.8), Sonnet 4.6 20%. A saboteur framed an innocent teammate after a login bug
- Authors’ conclusion: agents need explicit risk limits; multi-agent systems need audit trails, reputation and separation of duties
What happened
The work ran in the Anthropic Fellows Program (April–July 2026) with EVE’s developer Fenris Creations. The live EVE Online market was not used.
Why it matters
It is a public measurement of how hard covert sabotage by one agent is to detect inside a cooperating team of frontier agents.
Sources
1 source from 1 site. Numbers match the chips in the text.
1 source: 1 primary
Primary
- Anthropic: Project EVE: Claude plays MMORPGsanthropic.com, official
Changes
- Filed