fix(ai): fix mismatch between models.dev and OpenCode Go (Qwen3.5/3.6, MiniMax M2.7) (earendil-works#4110)

Author: jsynowiec

packages/ai/scripts/generate-models.ts

@@ -724,6 +724,26 @@ async function loadModelsDevData(): Promise<Model<any>[]> {
 					baseUrl = `${variant.basePath}/v1`;
 				}
 
+				// Fix known mismatches between models.dev npm data and actual
+				// OpenCode Go endpoint behaviour. models.dev reports these models
+				// as @ai-sdk/anthropic, but the OpenCode Go endpoints either don't
+				// accept Anthropic SDK auth (MiniMax M2.7) or are served through
+				// the OpenAI-compatible /v1/chat/completions path (Qwen 3.5/3.6).
+				// Switch them to openai-completions so requests use Bearer auth
+				// and the standard /v1/chat/completions endpoint.
+				if (variant.provider === "opencode-go") {
+					if (modelId === "minimax-m2.7") {
+						api = "openai-completions";
+						baseUrl = `${variant.basePath}/v1`;
+					}
+					if (modelId === "qwen3.5-plus" || modelId === "qwen3.6-plus") {
+						api = "openai-completions";
+						baseUrl = `${variant.basePath}/v1`;
+						// Qwen/DashScope uses enable_thinking at the top level.
+						compat = { ...(compat ?? {}), thinkingFormat: "qwen" };
+					}
+				}
+
 				models.push({
 					id: modelId,
 					name: m.name || modelId,

packages/ai/src/models.generated.ts

@@ -8463,9 +8463,9 @@ export const MODELS = {
 		"minimax-m2.7": {
 			id: "minimax-m2.7",
 			name: "MiniMax M2.7",
-			api: "anthropic-messages",
+			api: "openai-completions",
 			provider: "opencode-go",
-			baseUrl: "https://opencode.ai/zen/go",
+			baseUrl: "https://opencode.ai/zen/go/v1",
 			reasoning: true,
 			input: ["text"],
 			cost: {
@@ -8476,13 +8476,14 @@ export const MODELS = {
 			},
 			contextWindow: 204800,
 			maxTokens: 131072,
-		} satisfies Model<"anthropic-messages">,
+		} satisfies Model<"openai-completions">,
 		"qwen3.5-plus": {
 			id: "qwen3.5-plus",
 			name: "Qwen3.5 Plus",
-			api: "anthropic-messages",
+			api: "openai-completions",
 			provider: "opencode-go",
-			baseUrl: "https://opencode.ai/zen/go",
+			baseUrl: "https://opencode.ai/zen/go/v1",
+			compat: {"thinkingFormat":"qwen"},
 			reasoning: true,
 			input: ["text", "image"],
 			cost: {
@@ -8493,13 +8494,14 @@ export const MODELS = {
 			},
 			contextWindow: 262144,
 			maxTokens: 65536,
-		} satisfies Model<"anthropic-messages">,
+		} satisfies Model<"openai-completions">,
 		"qwen3.6-plus": {
 			id: "qwen3.6-plus",
 			name: "Qwen3.6 Plus",
-			api: "anthropic-messages",
+			api: "openai-completions",
 			provider: "opencode-go",
-			baseUrl: "https://opencode.ai/zen/go",
+			baseUrl: "https://opencode.ai/zen/go/v1",
+			compat: {"thinkingFormat":"qwen"},
 			reasoning: true,
 			input: ["text", "image"],
 			cost: {
@@ -8510,7 +8512,7 @@ export const MODELS = {
 			},
 			contextWindow: 262144,
 			maxTokens: 65536,
-		} satisfies Model<"anthropic-messages">,
+		} satisfies Model<"openai-completions">,
 	},
 	"openrouter": {
 		"ai21/jamba-large-1.7": {
@@ -9316,7 +9318,7 @@ export const MODELS = {
 				cacheRead: 0.024999999999999998,
 				cacheWrite: 0.08333333333333334,
 			},
-			contextWindow: 1048576,
+			contextWindow: 1000000,
 			maxTokens: 8192,
 		} satisfies Model<"openai-completions">,
 		"google/gemini-2.0-flash-lite-001": {