fix: prevent anthropic 3.5 models from use thinking (#8303)

uinstinct · RomneyDa · web-flow · commit aff2f31fec5d · 2025-10-23T13:55:01.000-07:00
* fix: prevent anthropic 3.5 models from use thinking

* turn off for all claude 3 models

* use -3-

* fix: add 3.5 exclusion for thinking

---------

Co-authored-by: Dallin Romney &lt;dallinromney@gmail.com&gt;
diff --git a/core/llm/autodetect.ts b/core/llm/autodetect.ts
@@ -144,7 +144,12 @@ function modelSupportsReasoning(
   if (!model) {
     return false;
   }
-  if ("anthropic" === model.underlyingProviderName) {
+  // do not turn reasoning on by default for claude 3 models
+  if (
+    model.model.includes("claude") &&
+    !model.model.includes("-3-") &&
+    !model.model.includes("-3.5-")
+  ) {
     return true;
   }
   if (model.model.includes("deepseek-r")) {

Original file line number	Diff line number	Diff line change
`@@ -144,7 +144,12 @@ function modelSupportsReasoning(`
`144`	`144`	`if (!model) {`
`145`	`145`	`return false;`
`146`	`146`	`}`
`147`		`- if ("anthropic" === model.underlyingProviderName) {`
	`147`	`+ // do not turn reasoning on by default for claude 3 models`
	`148`	`+ if (`
	`149`	`+ model.model.includes("claude") &&`
	`150`	`+ !model.model.includes("-3-") &&`
	`151`	`+ !model.model.includes("-3.5-")`
	`152`	`+ ) {`
`148`	`153`	`return true;`
`149`	`154`	`}`
`150`	`155`	`if (model.model.includes("deepseek-r")) {`