diff --git a/tools/develop/llm-parameter-sweep/sweep-config.template.json b/tools/develop/llm-parameter-sweep/sweep-config.template.json
index d55ead941..6a2fe81e6 100644
--- a/tools/develop/llm-parameter-sweep/sweep-config.template.json
+++ b/tools/develop/llm-parameter-sweep/sweep-config.template.json
@@ -7,7 +7,8 @@
     "openai": {
       "access": { "dialect": "openai", "oaiKey": "sk-...", "oaiOrg": "", "oaiHost": "", "heliKey": "" },
       "modelFilter": ["gpt-5", "o"],
-      "sweeps": ["temperature", "oai-reasoning-effort", "oai-verbosity", "oai-image-generation", "oai-web-search"]
+      "sweeps": ["temperature", "oai-temperature-think-high", "oai-temperature-think-none", "oai-reasoning-effort", "oai-verbosity", "oai-image-generation", "oai-web-search"],
+      "baseModelOverrides": { "maxTokens": 4096 }
     },
     "anthropic": {
       "access": { "dialect": "anthropic", "anthropicKey": "sk-ant-...", "anthropicHost": null, "heliconeKey": null },
diff --git a/tools/develop/llm-parameter-sweep/sweep.ts b/tools/develop/llm-parameter-sweep/sweep.ts
index c06871dff..8b7dd40dc 100644
--- a/tools/develop/llm-parameter-sweep/sweep.ts
+++ b/tools/develop/llm-parameter-sweep/sweep.ts
@@ -37,6 +37,24 @@ const SWEEP_DEFINITIONS = [
     mode: 'enumerate',
   }),
 
+  // OpenAI: temperature with/without reasoning
+  defineSweep({
+    name: 'oai-temperature-think-high',
+    description: 'Temperature parameter acceptance range',
+    applicability: { type: 'all' },
+    applyToModel: (value) => ({ temperature: value, reasoningEffort: 'high' }),
+    values: [0, 0.5, 1.0, 1.5, 2.0],
+    mode: 'enumerate',
+  }),
+  defineSweep({
+    name: 'oai-temperature-think-none',
+    description: 'Temperature parameter acceptance range',
+    applicability: { type: 'all' },
+    applyToModel: (value) => ({ temperature: value, reasoningEffort: 'none' }),
+    values: [0, 0.5, 1.0, 1.5, 2.0],
+    mode: 'enumerate',
+  }),
+
   // OpenAI: reasoning effort (Chat Completions + Responses API)
   defineSweep({
     name: 'oai-reasoning-effort',