diff --git a/src/api/providers/anthropic.ts b/src/api/providers/anthropic.ts
index 93804d99c2..67e1425482 100644
--- a/src/api/providers/anthropic.ts
+++ b/src/api/providers/anthropic.ts
@@ -19,11 +19,13 @@ export class AnthropicHandler implements ApiHandler {
 
 	@withRetry()
 	async *createMessage(systemPrompt: string, messages: Anthropic.Messages.MessageParam[]): ApiStream {
-		let budget_tokens = this.options.thinkingBudgetTokens || 0
-		const reasoningOn = budget_tokens !== 0 ? true : false
 		const model = this.getModel()
 		let stream: AnthropicStream<Anthropic.RawMessageStreamEvent>
 		const modelId = model.id
+
+		let budget_tokens = this.options.thinkingBudgetTokens || 0
+		const reasoningOn = modelId.includes("3-7") && budget_tokens !== 0 ? true : false
+
 		switch (modelId) {
 			// 'latest' alias does not support cache_control
 			case "claude-3-7-sonnet-20250219":
diff --git a/src/api/providers/bedrock.ts b/src/api/providers/bedrock.ts
index aee2363fe9..7d2ce21a7f 100644
--- a/src/api/providers/bedrock.ts
+++ b/src/api/providers/bedrock.ts
@@ -16,11 +16,12 @@ export class AwsBedrockHandler implements ApiHandler {
 
 	@withRetry()
 	async *createMessage(systemPrompt: string, messages: Anthropic.Messages.MessageParam[]): ApiStream {
-		let budget_tokens = this.options.thinkingBudgetTokens || 0
-		const reasoningOn = budget_tokens !== 0 ? true : false
 		// cross region inference requires prefixing the model id with the region
 		let modelId = await this.getModelId()
 
+		let budget_tokens = this.options.thinkingBudgetTokens || 0
+		const reasoningOn = modelId.includes("3-7") && budget_tokens !== 0 ? true : false
+
 		// Get model info and message indices for caching
 		const model = this.getModel()
 		const userMsgIndices = messages.reduce((acc, msg, index) => (msg.role === "user" ? [...acc, index] : acc), [] as number[])
diff --git a/src/api/providers/vertex.ts b/src/api/providers/vertex.ts
index 6ef9824875..2ba064cab7 100644
--- a/src/api/providers/vertex.ts
+++ b/src/api/providers/vertex.ts
@@ -32,7 +32,7 @@ export class VertexHandler implements ApiHandler {
 
 		if (modelId.includes("claude")) {
 			let budget_tokens = this.options.thinkingBudgetTokens || 0
-			const reasoningOn = budget_tokens !== 0 ? true : false
+			const reasoningOn = modelId.includes("3-7") && budget_tokens !== 0 ? true : false
 
 			let stream
 			switch (modelId) {