diff --git a/ai-setup.sh b/ai-setup.sh
index 3a87b9a..e59c55e 100755
--- a/ai-setup.sh
+++ b/ai-setup.sh
@@ -1102,7 +1102,7 @@ if ! command -v claude &>/dev/null; then
 fi
 
 SYS_PROMPT=$(_build_ai_sys_prompt)
-ANTHROPIC_BASE_URL=https://openrouter.ai/api/v1 \
+ANTHROPIC_BASE_URL=https://openrouter.ai/api \
 ANTHROPIC_AUTH_TOKEN="$api_key" \
 ANTHROPIC_MODEL=openai/gpt-5.5 \
 ANTHROPIC_DEFAULT_OPUS_MODEL=anthropic/claude-4.8-opus \