diff --git a/tools/push3-evolution/evolve.sh b/tools/push3-evolution/evolve.sh
index ea0a96b..0dc04e9 100755
--- a/tools/push3-evolution/evolve.sh
+++ b/tools/push3-evolution/evolve.sh
@@ -66,10 +66,10 @@ MUTATE_CLI="$SCRIPT_DIR/mutate-cli.ts"
 SEED_GEN_CLI="$SCRIPT_DIR/seed-gen-cli.ts"
 
 # EVAL_MODE controls which fitness backend is used:
-#   anvil  (default) — per-candidate Anvil+forge-script pipeline (fitness.sh)
-#   revm            — in-process revm via FitnessEvaluator.t.sol (batch-eval.sh)
-#                     Requires BASE_RPC_URL env var.  10-100× faster at scale.
-EVAL_MODE="${EVAL_MODE:-anvil}"
+#   revm   (default) — in-process revm via FitnessEvaluator.t.sol (batch-eval.sh)
+#                      Requires BASE_RPC_URL env var.  10-100× faster at scale.
+#   anvil            — per-candidate Anvil+forge-script pipeline (fitness.sh)
+EVAL_MODE="${EVAL_MODE:-revm}"
 
 # =============================================================================
 # Argument parsing