feat(providers): GLM-5.2 native reasoning_effort controls (#58884)

Port from Kilo-Org/kilocode#11555: GLM-5.2 exposes a native
reasoning_effort knob with two enabled levels (high / max) on its
OpenAI-compatible endpoints. Previously the zai profile (direct Z.AI
/api/paas/v4) used the base ProviderProfile and emitted nothing, and the
OpenCode Go profile only handled Kimi K2 / DeepSeek — so a user's effort
preference for GLM-5.2 was silently dropped on both routes.

- zai: ZaiProfile maps effort onto high/max (xhigh/max -> max, lower -> high)
- opencode-go: same mapping for GLM-5.2, alongside existing Kimi/DeepSeek
- alias spellings recognized (glm-5.2 / glm-5-2 / glm-5p2, vendor-prefixed)
- disabled / no effort leaves the server default untouched

plugins/model-providers/opencode-zen/__init__.py

@@ -31,6 +31,12 @@ def _is_deepseek_thinking_model(model: str | None) -> bool:
     return m == "deepseek-reasoner"
 
 
+def _is_glm_5_2_model(model: str | None) -> bool:
+    """Detect GLM-5.2 across alias spellings (glm-5.2 / glm-5-2 / glm-5p2)."""
+    m = _flat_model_name(model)
+    return any(token in m for token in ("glm-5.2", "glm-5-2", "glm-5p2"))
+
+
 class OpenCodeGoProfile(ProviderProfile):
     """OpenCode Go - model-specific reasoning controls."""
 
@@ -55,6 +61,21 @@ class OpenCodeGoProfile(ProviderProfile):
         extra_body: dict[str, Any] = {}
         top_level: dict[str, Any] = {}
 
+        if _is_glm_5_2_model(model):
+            # GLM-5.2 on OpenCode Go uses its native OpenAI-compatible
+            # reasoning_effort knob, which has exactly two enabled levels:
+            # high and max. Map Hermes' richer scale onto those; leave the
+            # server default alone when reasoning is disabled or unset.
+            if not isinstance(reasoning_config, dict):
+                return extra_body, top_level
+            if reasoning_config.get("enabled") is False:
+                return extra_body, top_level
+            effort = (reasoning_config.get("effort") or "").strip().lower()
+            if not effort or effort == "none":
+                return extra_body, top_level
+            top_level["reasoning_effort"] = "max" if effort in {"xhigh", "max"} else "high"
+            return extra_body, top_level
+
         if _is_kimi_k2_model(model):
             # Kimi K2 on OpenCode Go uses Moonshot's native wire shape:
             # extra_body.thinking (binary toggle) + top-level reasoning_effort

plugins/model-providers/zai/__init__.py

@@ -16,6 +16,12 @@ When no reasoning preference is set (``reasoning_config is None``) the field
 is omitted so the server default applies, matching prior behavior.  GLM
 models before 4.5 (e.g. ``glm-4-9b``) don't accept ``thinking`` and are left
 untouched.
+
+GLM-5.2 additionally exposes a native ``reasoning_effort`` knob with exactly
+two enabled levels — ``high`` and ``max`` — on the OpenAI-compatible endpoint
+(per Z.AI / BigModel docs).  Hermes' richer effort scale is collapsed onto
+those two so the user's effort preference actually reaches the model instead
+of being silently dropped.
 """
 
 from __future__ import annotations
@@ -40,8 +46,44 @@ def _model_supports_thinking(model: str | None) -> bool:
     return (major, minor) >= (4, 5)
 
 
+def _is_glm_5_2(model: str | None) -> bool:
+    """Detect GLM-5.2 across the alias spellings providers use.
+
+    Covers the canonical ``glm-5.2`` plus the ``glm-5-2`` / ``glm-5p2``
+    variants seen on relays (Fireworks ``glm-5p2``, etc.) and any
+    vendor-prefixed form (``z-ai/glm-5.2``, ``zai-org-glm-5-2``).
+    """
+    m = (model or "").strip().lower()
+    if not m:
+        return False
+    return any(token in m for token in ("glm-5.2", "glm-5-2", "glm-5p2"))
+
+
+def _glm_5_2_reasoning_effort(reasoning_config: dict | None) -> str | None:
+    """Map Hermes reasoning effort onto GLM-5.2's native ``high``/``max``.
+
+    GLM-5.2 only supports two enabled effort levels. ``xhigh``/``max``
+    request the top tier; everything else that is enabled requests ``high``
+    (its minimum thinking level). When reasoning is explicitly disabled, or
+    no effort preference is supplied, the server default is left untouched.
+    """
+    if not isinstance(reasoning_config, dict):
+        return None
+    if reasoning_config.get("enabled") is False:
+        return None
+
+    effort = (reasoning_config.get("effort") or "").strip().lower()
+    if not effort or effort == "none":
+        return None
+
+    if effort in {"xhigh", "max"}:
+        return "max"
+    # low / medium / minimal / high all clamp to GLM-5.2's minimum: high.
+    return "high"
+
+
 class ZaiProfile(ProviderProfile):
-    """Z.AI / GLM — extra_body.thinking enabled/disabled."""
+    """Z.AI / GLM — extra_body.thinking on/off + GLM-5.2 reasoning_effort."""
 
     def build_api_kwargs_extras(
         self, *, reasoning_config: dict | None = None, model: str | None = None, **context
@@ -49,7 +91,7 @@ class ZaiProfile(ProviderProfile):
         extra_body: dict[str, Any] = {}
         top_level: dict[str, Any] = {}
 
-        if not _model_supports_thinking(model):
+        if not _model_supports_thinking(model) and not _is_glm_5_2(model):
             return extra_body, top_level
 
         # Only emit when the user expressed a preference; omitting the field
@@ -58,6 +100,11 @@ class ZaiProfile(ProviderProfile):
             enabled = reasoning_config.get("enabled") is not False
             extra_body["thinking"] = {"type": "enabled" if enabled else "disabled"}
 
+        if _is_glm_5_2(model):
+            effort = _glm_5_2_reasoning_effort(reasoning_config)
+            if effort is not None:
+                top_level["reasoning_effort"] = effort
+
         return extra_body, top_level
 
 

tests/plugins/model_providers/test_opencode_go_profile.py

@@ -122,13 +122,68 @@ class TestOpenCodeGoDeepSeekThinking:
             assert top_level == {"reasoning_effort": "max"}
 
 
+class TestOpenCodeGoGLM52Reasoning:
+    """GLM-5.2 uses its native high/max reasoning_effort knob on OpenCode Go."""
+
+    def test_high_maps_to_high(self, opencode_go_profile):
+        extra_body, top_level = opencode_go_profile.build_api_kwargs_extras(
+            reasoning_config={"enabled": True, "effort": "high"},
+            model="glm-5.2",
+        )
+        assert extra_body == {}
+        assert top_level == {"reasoning_effort": "high"}
+
+    def test_low_and_medium_clamp_up_to_high(self, opencode_go_profile):
+        for effort in ("low", "medium", "minimal"):
+            extra_body, top_level = opencode_go_profile.build_api_kwargs_extras(
+                reasoning_config={"enabled": True, "effort": effort},
+                model="glm-5.2",
+            )
+            assert extra_body == {}
+            assert top_level == {"reasoning_effort": "high"}
+
+    def test_xhigh_and_max_map_to_max(self, opencode_go_profile):
+        for effort in ("xhigh", "max"):
+            extra_body, top_level = opencode_go_profile.build_api_kwargs_extras(
+                reasoning_config={"enabled": True, "effort": effort},
+                model="z-ai/glm-5.2",
+            )
+            assert extra_body == {}
+            assert top_level == {"reasoning_effort": "max"}
+
+    def test_disabled_leaves_server_default(self, opencode_go_profile):
+        extra_body, top_level = opencode_go_profile.build_api_kwargs_extras(
+            reasoning_config={"enabled": False, "effort": "high"},
+            model="glm-5.2",
+        )
+        assert extra_body == {}
+        assert top_level == {}
+
+    def test_no_config_leaves_server_default(self, opencode_go_profile):
+        extra_body, top_level = opencode_go_profile.build_api_kwargs_extras(
+            reasoning_config=None,
+            model="glm-5.2",
+        )
+        assert extra_body == {}
+        assert top_level == {}
+
+    @pytest.mark.parametrize("model", ["glm-5-2", "glm-5p2"])
+    def test_alias_spellings_recognized(self, opencode_go_profile, model):
+        extra_body, top_level = opencode_go_profile.build_api_kwargs_extras(
+            reasoning_config={"enabled": True, "effort": "max"},
+            model=model,
+        )
+        assert top_level == {"reasoning_effort": "max"}
+
+
 class TestOpenCodeGoModelGating:
-    """Other OpenCode Go models must not receive Kimi/DeepSeek controls."""
+    """Other OpenCode Go models must not receive Kimi/DeepSeek/GLM controls."""
 
     @pytest.mark.parametrize(
         "model",
         [
             "glm-5.1",
+            "glm-5",
             "qwen3.6-plus",
             "minimax-m2.7",
             "deepseek-v3.1",

tests/plugins/model_providers/test_zai_profile.py

@@ -1,4 +1,4 @@
-"""Unit tests for the Z.AI / GLM provider profile's thinking-mode wiring.
+"""Unit tests for the Z.AI / GLM provider profile's reasoning wiring.
 
 Z.AI's GLM-4.5-and-later chat models default to thinking-mode ON when the
 request omits ``thinking``.  Before the profile emitted the parameter,
@@ -6,6 +6,10 @@ request omits ``thinking``.  Before the profile emitted the parameter,
 Z.AI route — users who turned thinking off kept burning thinking tokens on
 every turn (the desktop "thinking reverts to medium" report).
 
+GLM-5.2 additionally exposes a native ``reasoning_effort`` knob with two
+enabled levels (high / max) on the OpenAI-compatible ``/api/paas/v4``
+endpoint; the Hermes effort scale is collapsed onto those.
+
 These tests pin the profile's wire-shape contract so Z.AI requests stay
 correctly shaped without going live.
 """
@@ -61,12 +65,102 @@ class TestZaiThinkingWireShape:
         assert top_level == {}
 
     def test_no_effort_levels_leak_to_top_level(self, zai_profile):
-        """GLM has no effort knob — never emit ``reasoning_effort``."""
+        """Non-5.2 GLM models have no effort knob — never emit
+        ``reasoning_effort`` for them (GLM-5.2 is the exception, below)."""
         for effort in ("minimal", "low", "medium", "high", "xhigh"):
-            _, top_level = zai_profile.build_api_kwargs_extras(
-                reasoning_config={"enabled": True, "effort": effort}, model="glm-5.2"
-            )
-            assert top_level == {}
+            for model in ("glm-5", "glm-5.1", "glm-4.6"):
+                _, top_level = zai_profile.build_api_kwargs_extras(
+                    reasoning_config={"enabled": True, "effort": effort}, model=model
+                )
+                assert top_level == {}
+
+
+class TestZaiGLM52ReasoningEffort:
+    """GLM-5.2's native ``reasoning_effort`` knob (two enabled levels)."""
+
+    def test_high_maps_to_high(self, zai_profile):
+        extra_body, top_level = zai_profile.build_api_kwargs_extras(
+            reasoning_config={"enabled": True, "effort": "high"},
+            model="glm-5.2",
+        )
+        assert extra_body == {"thinking": {"type": "enabled"}}
+        assert top_level == {"reasoning_effort": "high"}
+
+    @pytest.mark.parametrize("effort", ["low", "medium", "minimal"])
+    def test_lower_efforts_clamp_up_to_high(self, zai_profile, effort):
+        """GLM-5.2's minimum thinking level is high — lower Hermes levels
+        clamp onto it."""
+        extra_body, top_level = zai_profile.build_api_kwargs_extras(
+            reasoning_config={"enabled": True, "effort": effort},
+            model="glm-5.2",
+        )
+        assert extra_body == {"thinking": {"type": "enabled"}}
+        assert top_level == {"reasoning_effort": "high"}
+
+    @pytest.mark.parametrize("effort", ["xhigh", "max"])
+    def test_strong_efforts_map_to_max(self, zai_profile, effort):
+        extra_body, top_level = zai_profile.build_api_kwargs_extras(
+            reasoning_config={"enabled": True, "effort": effort},
+            model="glm-5.2",
+        )
+        assert extra_body == {"thinking": {"type": "enabled"}}
+        assert top_level == {"reasoning_effort": "max"}
+
+    def test_disabled_sends_no_effort(self, zai_profile):
+        """Disabled reasoning still sends the thinking-off marker but never
+        an effort level."""
+        extra_body, top_level = zai_profile.build_api_kwargs_extras(
+            reasoning_config={"enabled": False, "effort": "high"},
+            model="glm-5.2",
+        )
+        assert extra_body == {"thinking": {"type": "disabled"}}
+        assert top_level == {}
+
+    def test_no_config_leaves_server_default(self, zai_profile):
+        extra_body, top_level = zai_profile.build_api_kwargs_extras(
+            reasoning_config=None,
+            model="glm-5.2",
+        )
+        assert extra_body == {}
+        assert top_level == {}
+
+    def test_no_effort_sends_no_effort_level(self, zai_profile):
+        """Enabled but no effort preference → thinking marker only; the
+        server picks its default effort."""
+        extra_body, top_level = zai_profile.build_api_kwargs_extras(
+            reasoning_config={"enabled": True},
+            model="glm-5.2",
+        )
+        assert extra_body == {"thinking": {"type": "enabled"}}
+        assert top_level == {}
+
+    @pytest.mark.parametrize(
+        "model",
+        [
+            "z-ai/glm-5.2",
+            "glm-5-2",
+            "glm-5p2",
+            "accounts/fireworks/models/glm-5p2",
+            "zai-org-glm-5-2",
+        ],
+    )
+    def test_alias_spellings_recognized(self, zai_profile, model):
+        _, top_level = zai_profile.build_api_kwargs_extras(
+            reasoning_config={"enabled": True, "effort": "max"},
+            model=model,
+        )
+        assert top_level == {"reasoning_effort": "max"}
+
+    @pytest.mark.parametrize(
+        "model",
+        ["glm-5.1", "glm-5", "glm-4.7", "glm-4-9b", "", None],
+    )
+    def test_non_glm_5_2_models_get_no_effort(self, zai_profile, model):
+        _, top_level = zai_profile.build_api_kwargs_extras(
+            reasoning_config={"enabled": True, "effort": "high"},
+            model=model,
+        )
+        assert top_level == {}
 
 
 class TestZaiModelGating:
@@ -110,7 +204,7 @@ class TestZaiModelGating:
 
 
 class TestZaiFullKwargsIntegration:
-    """End-to-end: the transport's full kwargs carry the thinking marker."""
+    """End-to-end: the transport's full kwargs carry the reasoning wiring."""
 
     def test_disabled_reaches_the_wire(self, zai_profile):
         from agent.transports.chat_completions import ChatCompletionsTransport
@@ -139,3 +233,18 @@ class TestZaiFullKwargsIntegration:
             provider_name="zai",
         )
         assert "thinking" not in kwargs.get("extra_body", {})
+
+    def test_glm_5_2_effort_reaches_top_level(self, zai_profile):
+        from agent.transports.chat_completions import ChatCompletionsTransport
+
+        kwargs = ChatCompletionsTransport().build_kwargs(
+            model="glm-5.2",
+            messages=[{"role": "user", "content": "ping"}],
+            tools=None,
+            provider_profile=zai_profile,
+            reasoning_config={"enabled": True, "effort": "max"},
+            base_url="https://api.z.ai/api/paas/v4",
+            provider_name="zai",
+        )
+        assert kwargs["reasoning_effort"] == "max"
+        assert kwargs["extra_body"]["thinking"] == {"type": "enabled"}