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GPT-6 Agents Beat Left 4 Dead 2
Blogger imjustnewatai documented GPT-6 agents Astra and Jev cooperating through Left 4 Dead 2 campaigns, culminating in the agents completing all campaigns of the game.
2026-09-25 ~ 2026-09-26 · 2 episodes · 6 posts
Episode 1 · GPT-6 agents clear four Left 4 Dead 2 campaigns, final bridge remains (2026-09-25, 4 posts)
A GPT-6-driven agent duo, Astra and Jev, is playing through Left 4 Dead 2, with Jev handling controls and Astra doing planning and recovering from stuck loops. After early failed escape attempts, they have now cleared four campaigns and are tackling the final bridge finale in The Parish.
- GPT-6 "Astra" agent clears three chapters of Left 4 Dead 2 with 0/5 escapes — imjustnewatai · 2026-09-25
- GPT-6 Astra completes two Left 4 Dead 2 campaigns in human-AI co-op run — imjustnewatai · 2026-09-25
- GPT-6 agents beat half of Left 4 Dead 2, with Astra planning and Jev playing — imjustnewatai · 2026-09-25
- AI Agents Clear Four Left 4 Dead 2 Campaigns, Only The Parish Bridge Finale Left — imjustnewatai · 2026-09-26
Episode 2 · GPT-6 Astra with Jev completes all Left 4 Dead 2 campaigns (2026-09-26, 2 posts)
A developer demonstrated the AI agent combo 'GPT-6 Astra + Jev' completing all 5 campaigns and 23 chapters of Left 4 Dead 2 on easy difficulty with bot teammates, taking at least 13.8 hours in total and finishing the final chapter in 13 minutes 33 seconds.
- GPT-6 Astra beats all 5 L4D2 campaigns, 23 chapters, finale in 13m33s — imjustnewatai · 2026-09-26
- AI agents beat Left 4 Dead 2: 5 campaigns, 23 chapters, 13.8 hours, $12.27 in API costs — imjustnewatai · 2026-09-26