fix: don't route gpt-5-mini to Copilot Responses API

christso · christso · commit 6c94c9b5b66c · 2025-12-21T10:34:25.000+11:00
diff --git a/packages/opencode/src/provider/provider.ts b/packages/opencode/src/provider/provider.ts
@@ -111,7 +111,8 @@ export namespace Provider {
             return sdk.responses(modelID)
           }
 
-          if (useResponsesApi && isGpt5OrLater(modelID)) {
+          // gpt-5-mini is known to be unsupported via Responses API for some users.
+          if (useResponsesApi && isGpt5OrLater(modelID) && modelID !== "gpt-5-mini") {
             return sdk.responses(modelID)
           }
           return sdk.chat(modelID)
@@ -129,7 +130,7 @@ export namespace Provider {
             return sdk.responses(modelID)
           }
 
-          if (useResponsesApi && isGpt5OrLater(modelID)) {
+          if (useResponsesApi && isGpt5OrLater(modelID) && modelID !== "gpt-5-mini") {
             return sdk.responses(modelID)
           }
           return sdk.chat(modelID)

Original file line number	Diff line number	Diff line change
`@@ -111,7 +111,8 @@ export namespace Provider {`
`111`	`111`	`return sdk.responses(modelID)`
`112`	`112`	`}`
`113`	`113`
`114`		`- if (useResponsesApi && isGpt5OrLater(modelID)) {`
	`114`	`+ // gpt-5-mini is known to be unsupported via Responses API for some users.`
	`115`	`+ if (useResponsesApi && isGpt5OrLater(modelID) && modelID !== "gpt-5-mini") {`
`115`	`116`	`return sdk.responses(modelID)`
`116`	`117`	`}`
`117`	`118`	`return sdk.chat(modelID)`
`@@ -129,7 +130,7 @@ export namespace Provider {`
`129`	`130`	`return sdk.responses(modelID)`
`130`	`131`	`}`
`131`	`132`
`132`		`- if (useResponsesApi && isGpt5OrLater(modelID)) {`
	`133`	`+ if (useResponsesApi && isGpt5OrLater(modelID) && modelID !== "gpt-5-mini") {`
`133`	`134`	`return sdk.responses(modelID)`
`134`	`135`	`}`
`135`	`136`	`return sdk.chat(modelID)`