diff --git a/vm/ai-env/ai.env b/vm/ai-env/ai.env
index 8f1cb74..ff4ecc8 100644
--- a/vm/ai-env/ai.env
+++ b/vm/ai-env/ai.env
@@ -5,8 +5,8 @@ DISCORD_APPROVALS_CHANNEL_ID=1557425140302872698
 DISCORD_ESCALATION_CHANNEL_ID=1557425282363691048
 # optional: restrict button decisions to one role id (empty = any member of the server)
 DISCORD_APPROVER_ROLE_ID=
-# experiment design 11.1: candidates gpt-6-astra / gpt-6.1-sol / gpt-6-luna (OpenAI model page 2026-10-08); fixed after WP-12 measurement
-OPENAI_MODEL=gpt-6.1-sol
+# experiment design 11.1: candidates gpt-6-astra / gpt-6.1-sol / gpt-6-luna (OpenAI model page 2026-10-08). luna for the first live checks and campaign (budget), compare with sol afterwards
+OPENAI_MODEL=gpt-6-luna
 EMBED_MODEL=text-embedding-3-small
 HARNESS_URL=http://10.20.0.11:8080
 MIMIR_URL=http://10.20.0.10:9009/prometheus