Add GPT 5 support (#902)

package-lock.json

 {
   "name": "dyad",
-  "version": "0.15.0-beta.2",
+  "version": "0.16.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "dyad",
-      "version": "0.15.0-beta.2",
+      "version": "0.16.0",
       "license": "MIT",
       "dependencies": {
         "@ai-sdk/anthropic": "^1.2.8",
         "@ai-sdk/google": "^1.2.19",
-        "@ai-sdk/openai": "^1.3.7",
+        "@ai-sdk/openai": "^1.3.24",
         "@ai-sdk/openai-compatible": "^0.2.13",
         "@biomejs/biome": "^1.9.4",
         "@dyad-sh/supabase-management-js": "v1.0.0",
@@ -171,13 +171,13 @@
       }
     },
     "node_modules/@ai-sdk/openai": {
-      "version": "1.3.21",
-      "resolved": "https://registry.npmjs.org/@ai-sdk/openai/-/openai-1.3.21.tgz",
-      "integrity": "sha512-ipAhkRKUd2YaMmn7DAklX3N7Ywx/rCsJHVyb0V/lKRqPcc612qAFVbjg+Uve8QYJlbPxgfsM4s9JmCFp6PSdYw==",
+      "version": "1.3.24",
+      "resolved": "https://registry.npmjs.org/@ai-sdk/openai/-/openai-1.3.24.tgz",
+      "integrity": "sha512-GYXnGJTHRTZc4gJMSmFRgEQudjqd4PUN0ZjQhPwOAYH1yOAvQoG/Ikqs+HyISRbLPCrhbZnPKCNHuRU4OfpW0Q==",
       "license": "Apache-2.0",
       "dependencies": {
         "@ai-sdk/provider": "1.1.3",
-        "@ai-sdk/provider-utils": "2.2.7"
+        "@ai-sdk/provider-utils": "2.2.8"
       },
       "engines": {
         "node": ">=18"
@@ -202,6 +202,23 @@
         "zod": "^3.0.0"
       }
     },
+    "node_modules/@ai-sdk/openai/node_modules/@ai-sdk/provider-utils": {
+      "version": "2.2.8",
+      "resolved": "https://registry.npmjs.org/@ai-sdk/provider-utils/-/provider-utils-2.2.8.tgz",
+      "integrity": "sha512-fqhG+4sCVv8x7nFzYnFo19ryhAa3w096Kmc3hWxMQfW/TubPOmt3A6tYZhl4mUfQWWQMsuSkLrtjlWuXBVSGQA==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@ai-sdk/provider": "1.1.3",
+        "nanoid": "^3.3.8",
+        "secure-json-parse": "^2.7.0"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "peerDependencies": {
+        "zod": "^3.23.8"
+      }
+    },
     "node_modules/@ai-sdk/provider": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/@ai-sdk/provider/-/provider-1.1.3.tgz",

package.json

@@ -85,7 +85,7 @@
   "dependencies": {
     "@ai-sdk/anthropic": "^1.2.8",
     "@ai-sdk/google": "^1.2.19",
-    "@ai-sdk/openai": "^1.3.7",
+    "@ai-sdk/openai": "^1.3.24",
     "@ai-sdk/openai-compatible": "^0.2.13",
     "@biomejs/biome": "^1.9.4",
     "@dyad-sh/supabase-management-js": "v1.0.0",

src/ipc/handlers/chat_stream_handlers.ts

@@ -38,7 +38,7 @@ import * as path from "path";
 import * as os from "os";
 import * as crypto from "crypto";
 import { readFile, writeFile, unlink } from "fs/promises";
-import { getMaxTokens } from "../utils/token_utils";
+import { getMaxTokens, getTemperature } from "../utils/token_utils";
 import { MAX_CHAT_TURNS_IN_CONTEXT } from "@/constants/settings_constants";
 import { validateChatContext } from "../utils/context_paths_utils";
 import { GoogleGenerativeAIProviderOptions } from "@ai-sdk/google";
@@ -58,6 +58,7 @@ import {
 } from "../utils/dyad_tag_parser";
 import { fileExists } from "../utils/file_utils";
 import { FileUploadsState } from "../utils/file_uploads_state";
+import { OpenAIResponsesProviderOptions } from "@ai-sdk/openai";
 
 type AsyncIterableStream<T> = AsyncIterable<T> & ReadableStream<T>;
 
@@ -593,7 +594,7 @@ This conversation includes one or more image attachments. When the user uploads
           }
           return streamText({
             maxTokens: await getMaxTokens(settings.selectedModel),
-            temperature: 0,
+            temperature: await getTemperature(settings.selectedModel),
             maxRetries: 2,
             model: modelClient.model,
             providerOptions: {
@@ -609,6 +610,9 @@ This conversation includes one or more image attachments. When the user uploads
                   includeThoughts: true,
                 },
               } satisfies GoogleGenerativeAIProviderOptions,
+              openai: {
+                reasoningSummary: "auto",
+              } satisfies OpenAIResponsesProviderOptions,
             },
             system: systemPrompt,
             messages: chatMessages.filter((m) => m.content),

src/ipc/ipc_types.ts

@@ -183,6 +183,7 @@ export type LanguageModel =
       tag?: string;
       maxOutputTokens?: number;
       contextWindow?: number;
+      temperature?: number;
       type: "custom";
     }
   | {
@@ -192,6 +193,7 @@ export type LanguageModel =
       tag?: string;
       maxOutputTokens?: number;
       contextWindow?: number;
+      temperature?: number;
       type: "local" | "cloud";
     };
 

src/ipc/shared/language_model_helpers.ts

@@ -15,6 +15,7 @@ export interface ModelOption {
   name: string;
   displayName: string;
   description: string;
+  temperature?: number;
   tag?: string;
   maxOutputTokens?: number;
   contextWindow?: number;
@@ -22,6 +23,39 @@ export interface ModelOption {
 
 export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
   openai: [
+    // https://platform.openai.com/docs/models/gpt-5
+    {
+      name: "gpt-5",
+      displayName: "GPT 5",
+      description: "OpenAI's flagship model",
+      // Technically it's 128k but OpenAI errors if you set max_tokens instead of max_completion_tokens
+      maxOutputTokens: undefined,
+      contextWindow: 400_000,
+      // Requires temperature to be default value (1)
+      temperature: 1,
+    },
+    // https://platform.openai.com/docs/models/gpt-5-mini
+    {
+      name: "gpt-5-mini",
+      displayName: "GPT 5 Mini",
+      description: "OpenAI's lightweight, but intelligent model",
+      // Technically it's 128k but OpenAI errors if you set max_tokens instead of max_completion_tokens
+      maxOutputTokens: undefined,
+      contextWindow: 400_000,
+      // Requires temperature to be default value (1)
+      temperature: 1,
+    },
+    // https://platform.openai.com/docs/models/gpt-5-nano
+    {
+      name: "gpt-5-nano",
+      displayName: "GPT 5 Nano",
+      description: "Fastest, most cost-efficient version of GPT-5",
+      // Technically it's 128k but OpenAI errors if you set max_tokens instead of max_completion_tokens
+      maxOutputTokens: undefined,
+      contextWindow: 400_000,
+      // Requires temperature to be default value (1)
+      temperature: 1,
+    },
     // https://platform.openai.com/docs/models/gpt-4.1
     {
       name: "gpt-4.1",
@@ -29,6 +63,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       description: "OpenAI's flagship model",
       maxOutputTokens: 32_768,
       contextWindow: 1_047_576,
+      temperature: 0,
     },
     // https://platform.openai.com/docs/models/gpt-4.1-mini
     {
@@ -37,6 +72,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       description: "OpenAI's lightweight, but intelligent model",
       maxOutputTokens: 32_768,
       contextWindow: 1_047_576,
+      temperature: 0,
     },
     // https://platform.openai.com/docs/models/o3-mini
     {
@@ -46,6 +82,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       // See o4-mini comment below for why we set this to 32k
       maxOutputTokens: 32_000,
       contextWindow: 200_000,
+      temperature: 0,
     },
     // https://platform.openai.com/docs/models/o4-mini
     {
@@ -57,6 +94,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       // the max output tokens is *included* in the context window limit.
       maxOutputTokens: 32_000,
       contextWindow: 200_000,
+      temperature: 0,
     },
   ],
   // https://docs.anthropic.com/en/docs/about-claude/models/all-models#model-comparison-table
@@ -68,6 +106,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       // See comment below for Claude 3.7 Sonnet for why we set this to 16k
       maxOutputTokens: 16_000,
       contextWindow: 200_000,
+      temperature: 0,
     },
     {
       name: "claude-3-7-sonnet-latest",
@@ -79,6 +118,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       // https://docs.anthropic.com/en/docs/build-with-claude/extended-thinking#max-tokens-and-context-window-size-with-extended-thinking
       maxOutputTokens: 16_000,
       contextWindow: 200_000,
+      temperature: 0,
     },
     {
       name: "claude-3-5-sonnet-20241022",
@@ -86,6 +126,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       description: "Good coder, excellent at following instructions",
       maxOutputTokens: 8_000,
       contextWindow: 200_000,
+      temperature: 0,
     },
     {
       name: "claude-3-5-haiku-20241022",
@@ -93,6 +134,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       description: "Lightweight coder",
       maxOutputTokens: 8_000,
       contextWindow: 200_000,
+      temperature: 0,
     },
   ],
   google: [
@@ -105,6 +147,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       maxOutputTokens: 65_536 - 1,
       // Gemini context window = input token + output token
       contextWindow: 1_048_576,
+      temperature: 0,
     },
     // https://ai.google.dev/gemini-api/docs/models#gemini-2.5-flash-preview
     {
@@ -115,6 +158,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       maxOutputTokens: 65_536 - 1,
       // Gemini context window = input token + output token
       contextWindow: 1_048_576,
+      temperature: 0,
     },
   ],
   openrouter: [
@@ -124,6 +168,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       description: "Qwen's best coding model",
       maxOutputTokens: 32_000,
       contextWindow: 262_000,
+      temperature: 0,
     },
     // https://openrouter.ai/deepseek/deepseek-chat-v3-0324:free
     {
@@ -132,6 +177,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       description: "Use for free (data may be used for training)",
       maxOutputTokens: 32_000,
       contextWindow: 128_000,
+      temperature: 0,
     },
     // https://openrouter.ai/moonshotai/kimi-k2
     {
@@ -140,6 +186,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       description: "Powerful cost-effective model",
       maxOutputTokens: 32_000,
       contextWindow: 131_000,
+      temperature: 0,
     },
     {
       name: "deepseek/deepseek-r1-0528",
@@ -147,6 +194,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       description: "Good reasoning model with excellent price for performance",
       maxOutputTokens: 32_000,
       contextWindow: 128_000,
+      temperature: 0,
     },
   ],
   auto: [
@@ -160,6 +208,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       // and smart auto.
       maxOutputTokens: 32_000,
       contextWindow: 1_000_000,
+      temperature: 0,
     },
   ],
 };

src/ipc/utils/get_model_client.ts

@@ -183,7 +183,7 @@ function getRegularModelClient(
       const provider = createOpenAI({ apiKey });
       return {
         modelClient: {
-          model: provider(model.name),
+          model: provider.responses(model.name),
           builtinProviderId: providerId,
         },
         backupModelClients: [],

src/ipc/utils/thinking_utils.ts

@@ -23,6 +23,11 @@ export function getExtraProviderOptions(
   if (!providerId) {
     return {};
   }
+  if (providerId === "openai") {
+    return {
+      reasoning_effort: "medium",
+    };
+  }
   if (PROVIDERS_THAT_SUPPORT_THINKING.includes(providerId)) {
     const budgetTokens = getThinkingBudgetTokens(settings?.thinkingBudget);
     return {

src/ipc/utils/token_utils.ts

@@ -24,10 +24,16 @@ export async function getContextWindow() {
   return modelOption?.contextWindow || DEFAULT_CONTEXT_WINDOW;
 }
 
-// Most models support at least 8000 output tokens so we use it as a default value.
-const DEFAULT_MAX_TOKENS = 8_000;
+export async function getMaxTokens(
+  model: LargeLanguageModel,
+): Promise<number | undefined> {
+  const modelOption = await findLanguageModel(model);
+  return modelOption?.maxOutputTokens ?? undefined;
+}
 
-export async function getMaxTokens(model: LargeLanguageModel) {
+export async function getTemperature(
+  model: LargeLanguageModel,
+): Promise<number> {
   const modelOption = await findLanguageModel(model);
-  return modelOption?.maxOutputTokens || DEFAULT_MAX_TOKENS;
+  return modelOption?.temperature ?? 0;
 }