diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index 471da03cb..407c26878 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -657,9 +657,21 @@ export namespace ProviderTransform {
         // https://v5.ai-sdk.dev/providers/ai-sdk-providers/perplexity
         return {}
 
-      case "@mymediset/sap-ai-provider":
       case "@jerome-benoit/sap-ai-provider-v2":
         if (model.api.id.includes("anthropic")) {
+          if (isAnthropicAdaptive) {
+            return Object.fromEntries(
+              adaptiveEfforts.map((effort) => [
+                effort,
+                {
+                  thinking: {
+                    type: "adaptive",
+                  },
+                  effort,
+                },
+              ]),
+            )
+          }
           return {
             high: {
               thinking: {
@@ -675,7 +687,26 @@ export namespace ProviderTransform {
             },
           }
         }
-        return Object.fromEntries(WIDELY_SUPPORTED_EFFORTS.map((effort) => [effort, { reasoningEffort: effort }]))
+        if (model.api.id.includes("gemini") && id.includes("2.5")) {
+          return {
+            high: {
+              thinkingConfig: {
+                includeThoughts: true,
+                thinkingBudget: 16000,
+              },
+            },
+            max: {
+              thinkingConfig: {
+                includeThoughts: true,
+                thinkingBudget: 24576,
+              },
+            },
+          }
+        }
+        if (model.api.id.includes("gpt") || /\bo[1-9]/.test(model.api.id)) {
+          return Object.fromEntries(WIDELY_SUPPORTED_EFFORTS.map((effort) => [effort, { reasoningEffort: effort }]))
+        }
+        return {}
     }
     return {}
   }
diff --git a/packages/opencode/test/provider/transform.test.ts b/packages/opencode/test/provider/transform.test.ts
index 512819a65..b6d3afc2d 100644
--- a/packages/opencode/test/provider/transform.test.ts
+++ b/packages/opencode/test/provider/transform.test.ts
@@ -2479,4 +2479,145 @@ describe("ProviderTransform.variants", () => {
       expect(result).toEqual({})
     })
   })
+
+  describe("@jerome-benoit/sap-ai-provider-v2", () => {
+    test("anthropic models return thinking variants", () => {
+      const model = createMockModel({
+        id: "sap-ai-core/anthropic--claude-sonnet-4",
+        providerID: "sap-ai-core",
+        api: {
+          id: "anthropic--claude-sonnet-4",
+          url: "https://api.ai.sap",
+          npm: "@jerome-benoit/sap-ai-provider-v2",
+        },
+      })
+      const result = ProviderTransform.variants(model)
+      expect(Object.keys(result)).toEqual(["high", "max"])
+      expect(result.high).toEqual({
+        thinking: {
+          type: "enabled",
+          budgetTokens: 16000,
+        },
+      })
+      expect(result.max).toEqual({
+        thinking: {
+          type: "enabled",
+          budgetTokens: 31999,
+        },
+      })
+    })
+
+    test("anthropic 4.6 models return adaptive thinking variants", () => {
+      const model = createMockModel({
+        id: "sap-ai-core/anthropic--claude-sonnet-4-6",
+        providerID: "sap-ai-core",
+        api: {
+          id: "anthropic--claude-sonnet-4-6",
+          url: "https://api.ai.sap",
+          npm: "@jerome-benoit/sap-ai-provider-v2",
+        },
+      })
+      const result = ProviderTransform.variants(model)
+      expect(Object.keys(result)).toEqual(["low", "medium", "high", "max"])
+      expect(result.low).toEqual({
+        thinking: {
+          type: "adaptive",
+        },
+        effort: "low",
+      })
+      expect(result.max).toEqual({
+        thinking: {
+          type: "adaptive",
+        },
+        effort: "max",
+      })
+    })
+
+    test("gemini 2.5 models return thinkingConfig variants", () => {
+      const model = createMockModel({
+        id: "sap-ai-core/gcp--gemini-2.5-pro",
+        providerID: "sap-ai-core",
+        api: {
+          id: "gcp--gemini-2.5-pro",
+          url: "https://api.ai.sap",
+          npm: "@jerome-benoit/sap-ai-provider-v2",
+        },
+      })
+      const result = ProviderTransform.variants(model)
+      expect(Object.keys(result)).toEqual(["high", "max"])
+      expect(result.high).toEqual({
+        thinkingConfig: {
+          includeThoughts: true,
+          thinkingBudget: 16000,
+        },
+      })
+      expect(result.max).toEqual({
+        thinkingConfig: {
+          includeThoughts: true,
+          thinkingBudget: 24576,
+        },
+      })
+    })
+
+    test("gpt models return reasoningEffort variants", () => {
+      const model = createMockModel({
+        id: "sap-ai-core/azure-openai--gpt-4o",
+        providerID: "sap-ai-core",
+        api: {
+          id: "azure-openai--gpt-4o",
+          url: "https://api.ai.sap",
+          npm: "@jerome-benoit/sap-ai-provider-v2",
+        },
+      })
+      const result = ProviderTransform.variants(model)
+      expect(Object.keys(result)).toEqual(["low", "medium", "high"])
+      expect(result.low).toEqual({ reasoningEffort: "low" })
+      expect(result.high).toEqual({ reasoningEffort: "high" })
+    })
+
+    test("o-series models return reasoningEffort variants", () => {
+      const model = createMockModel({
+        id: "sap-ai-core/azure-openai--o3-mini",
+        providerID: "sap-ai-core",
+        api: {
+          id: "azure-openai--o3-mini",
+          url: "https://api.ai.sap",
+          npm: "@jerome-benoit/sap-ai-provider-v2",
+        },
+      })
+      const result = ProviderTransform.variants(model)
+      expect(Object.keys(result)).toEqual(["low", "medium", "high"])
+      expect(result.low).toEqual({ reasoningEffort: "low" })
+      expect(result.high).toEqual({ reasoningEffort: "high" })
+    })
+
+
+    test("sonar models return empty object", () => {
+      const model = createMockModel({
+        id: "sap-ai-core/perplexity--sonar-pro",
+        providerID: "sap-ai-core",
+        api: {
+          id: "perplexity--sonar-pro",
+          url: "https://api.ai.sap",
+          npm: "@jerome-benoit/sap-ai-provider-v2",
+        },
+      })
+      const result = ProviderTransform.variants(model)
+      expect(result).toEqual({})
+    })
+
+    test("mistral models return empty object", () => {
+      const model = createMockModel({
+        id: "sap-ai-core/mistral--mistral-large",
+        providerID: "sap-ai-core",
+        api: {
+          id: "mistral--mistral-large",
+          url: "https://api.ai.sap",
+          npm: "@jerome-benoit/sap-ai-provider-v2",
+        },
+      })
+      const result = ProviderTransform.variants(model)
+      expect(result).toEqual({})
+    })
+  })
 })