diff --git a/Cargo.lock b/Cargo.lock
index e7724ccc..d6a2c3ef 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4181,6 +4181,7 @@ dependencies = [
  "op-succinct-build-utils",
  "op-succinct-client-utils",
  "op-succinct-host-utils",
+ "rand 0.8.5",
  "serde",
  "serde_json",
  "serde_repr",
diff --git a/Cargo.toml b/Cargo.toml
index a5b0e59b..8cfe8398 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -114,6 +114,8 @@ sp1-zkvm = { version = "4.0.0", features = ["verify", "embedded"] }
 # TODO: Switch back to version tag once the Docker workspace directory change is merged.
 sp1-build = { git = "https://github.com/succinctlabs/sp1", branch = "dev" }
 
+rand = { version = "0.8.5", default-features = false }
+
 [profile.release-client-lto]
 inherits = "release"
 panic = "abort"
diff --git a/elf/range-elf b/elf/range-elf
index 7e497dfe..f4d7074d 100755
Binary files a/elf/range-elf and b/elf/range-elf differ
diff --git a/proposer/succinct/Cargo.toml b/proposer/succinct/Cargo.toml
index 33b62d8b..a9d29656 100644
--- a/proposer/succinct/Cargo.toml
+++ b/proposer/succinct/Cargo.toml
@@ -22,6 +22,7 @@ op-succinct-host-utils.workspace = true
 
 # sp1
 sp1-sdk.workspace = true
+rand.workspace = true
 
 anyhow.workspace = true
 dotenv.workspace = true
diff --git a/proposer/succinct/bin/server.rs b/proposer/succinct/bin/server.rs
index 5b690b1c..942ff48a 100644
--- a/proposer/succinct/bin/server.rs
+++ b/proposer/succinct/bin/server.rs
@@ -22,6 +22,7 @@ use op_succinct_proposer::{
     AggProofRequest, ProofResponse, ProofStatus, SpanProofRequest, SuccinctProposerConfig,
     ValidateConfigRequest, ValidateConfigResponse,
 };
+use rand::Rng;
 use sp1_sdk::{
     network::{
         proto::network::{ExecutionStatus, FulfillmentStatus},
@@ -182,7 +183,21 @@ async fn request_span_proof(
         }
     };
 
-    let client = ProverClient::builder().network().build();
+    let cluster_1_weight = env::var("CLUSTER_1_WEIGHT")
+        .unwrap_or_else(|_| "50".to_string())
+        .parse::<u8>()
+        .unwrap_or(50);
+
+    let private_key = if rand::thread_rng().gen_range(0..100) < cluster_1_weight {
+        env::var("NETWORK_PRIVATE_KEY_1").unwrap()
+    } else {
+        env::var("NETWORK_PRIVATE_KEY_2").unwrap()
+    };
+    let client = ProverClient::builder()
+        .network()
+        .private_key(&private_key)
+        .build();
+
     let proof_id = client
         .prove(&state.range_pk, &sp1_stdin)
         .compressed()