diff --git a/headroom/proxy/cost.py b/headroom/proxy/cost.py
index ce91bb04a..45a6937f5 100644
--- a/headroom/proxy/cost.py
+++ b/headroom/proxy/cost.py
@@ -575,6 +575,21 @@ def build_session_summary(
     # dropping info the model actually needs).
     summary["mcp"] = _aggregate_mcp_events()
 
+    # Codex WS sessions compress per-unit on the long-lived /responses socket,
+    # but turn-level records (which feed tokens_saved_total above) only land
+    # when a response.completed frame carries usage. Surface the live per-unit
+    # counters so a WS-only session doesn't read as "no activity" mid-turn.
+    # Kept as a separate block rather than summed into the compression totals:
+    # turns that DID record already contributed the same savings there, so
+    # adding the unit sums on top would double-count.
+    ws_units = getattr(metrics, "codex_ws_units_total", 0)
+    if ws_units:
+        summary["codex_ws"] = {
+            "units_total": ws_units,
+            "units_modified": getattr(metrics, "codex_ws_units_modified_total", 0),
+            "tokens_saved": getattr(metrics, "codex_ws_unit_tokens_saved_sum", 0),
+        }
+
     # Add tip if token mode would help
     if proxy.config.mode == PROXY_MODE_CACHE and uncompressed_reasons["prefix_frozen"] > 10:
         summary["tip"] = (
diff --git a/tests/test_proxy_dashboard_stats_cache.py b/tests/test_proxy_dashboard_stats_cache.py
index 92056e1ce..ba0cde706 100644
--- a/tests/test_proxy_dashboard_stats_cache.py
+++ b/tests/test_proxy_dashboard_stats_cache.py
@@ -495,6 +495,39 @@ def test_session_summary_uses_generic_cli_filtering_keys() -> None:
     assert payload["compression"]["rtk_tokens_avoided"] == 7
     assert payload["cost"]["breakdown"]["cli_filtering_savings_usd"] is None
     assert payload["cost"]["breakdown"]["rtk_savings_usd"] is None
+    # Metrics fixture has no codex_ws counters -> no codex_ws block.
+    assert "codex_ws" not in payload
+
+
+def test_session_summary_surfaces_codex_ws_counters() -> None:
+    from headroom.proxy.cost import build_session_summary
+
+    proxy = SimpleNamespace(
+        config=SimpleNamespace(mode="token"),
+        logger=SimpleNamespace(_logs=[]),
+        cost_tracker=SimpleNamespace(stats=lambda: {}),
+    )
+    metrics = SimpleNamespace(
+        requests_by_model={},
+        tokens_saved_total=0,
+        codex_ws_units_total=12,
+        codex_ws_units_modified_total=9,
+        codex_ws_unit_tokens_saved_sum=4321,
+    )
+
+    payload = build_session_summary(
+        proxy,
+        metrics,
+        {},
+        cli_tokens_avoided=0,
+        total_tokens_before=0,
+    )
+
+    assert payload["codex_ws"] == {
+        "units_total": 12,
+        "units_modified": 9,
+        "tokens_saved": 4321,
+    }
 
 
 def test_stats_reset_clears_runtime_proxy_counters(monkeypatch: pytest.MonkeyPatch) -> None: