feat(openai): add GPT-5.6 family (sol, terra, luna) support

packages/types/src/providers/openai-codex.ts

@@ -16,14 +16,64 @@ import type { ModelInfo } from "../model.js"
 
 export type OpenAiCodexModelId = keyof typeof openAiCodexModels
 
-export const openAiCodexDefaultModelId: OpenAiCodexModelId = "gpt-5.3-codex"
+export const openAiCodexDefaultModelId: OpenAiCodexModelId = "gpt-5.6-sol"
 
 /**
  * Models available through the Codex OAuth flow.
  * These models are accessible to ChatGPT Plus/Pro subscribers.
  * Costs are 0 as they are covered by the subscription.
  */
 export const openAiCodexModels = {
+	"gpt-5.6-sol": {
+		maxTokens: 128000,
+		contextWindow: 372000,
+		includedTools: ["apply_patch"],
+		excludedTools: ["apply_diff", "write_to_file"],
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningEffort: ["none", "low", "medium", "high", "xhigh", "max"],
+		reasoningEffort: "medium",
+		// Subscription-based: no per-token costs
+		inputPrice: 0,
+		outputPrice: 0,
+		supportsVerbosity: true,
+		supportsTemperature: false,
+		description:
+			"GPT-5.6 Sol: OpenAI's flagship model for frontier reasoning, coding, and agentic workflows via ChatGPT subscription",
+	},
+	"gpt-5.6-terra": {
+		maxTokens: 128000,
+		contextWindow: 372000,
+		includedTools: ["apply_patch"],
+		excludedTools: ["apply_diff", "write_to_file"],
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningEffort: ["none", "low", "medium", "high", "xhigh", "max"],
+		reasoningEffort: "medium",
+		// Subscription-based: no per-token costs
+		inputPrice: 0,
+		outputPrice: 0,
+		supportsVerbosity: true,
+		supportsTemperature: false,
+		description:
+			"GPT-5.6 Terra: Balanced everyday model with GPT-5.5-competitive performance via ChatGPT subscription",
+	},
+	"gpt-5.6-luna": {
+		maxTokens: 128000,
+		contextWindow: 372000,
+		includedTools: ["apply_patch"],
+		excludedTools: ["apply_diff", "write_to_file"],
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningEffort: ["none", "low", "medium", "high", "xhigh", "max"],
+		reasoningEffort: "medium",
+		// Subscription-based: no per-token costs
+		inputPrice: 0,
+		outputPrice: 0,
+		supportsVerbosity: true,
+		supportsTemperature: false,
+		description: "GPT-5.6 Luna: The fastest, most affordable member of the GPT-5.6 family via ChatGPT subscription",
+	},
 	"gpt-5.1-codex-max": {
 		maxTokens: 128000,
 		contextWindow: 400000,

packages/types/src/providers/openai.ts

@@ -3,9 +3,81 @@ import type { ModelInfo } from "../model.js"
 // https://openai.com/api/pricing/
 export type OpenAiNativeModelId = keyof typeof openAiNativeModels
 
-export const openAiNativeDefaultModelId: OpenAiNativeModelId = "gpt-5.1-codex-max"
+export const openAiNativeDefaultModelId: OpenAiNativeModelId = "gpt-5.6-sol"
 
 export const openAiNativeModels = {
+	"gpt-5.6-sol": {
+		maxTokens: 128000,
+		contextWindow: 1_050_000,
+		includedTools: ["apply_patch"],
+		excludedTools: ["apply_diff", "write_to_file"],
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningEffort: ["none", "low", "medium", "high", "xhigh", "max"],
+		reasoningEffort: "medium",
+		inputPrice: 5.0,
+		outputPrice: 30.0,
+		cacheWritesPrice: 6.25,
+		cacheReadsPrice: 0.5,
+		longContextPricing: {
+			thresholdTokens: 272_000,
+			inputPriceMultiplier: 2,
+			outputPriceMultiplier: 1.5,
+			appliesToServiceTiers: ["default", "flex"],
+		},
+		supportsVerbosity: true,
+		supportsTemperature: false,
+		tiers: [
+			{ name: "flex", contextWindow: 1_050_000, inputPrice: 2.5, outputPrice: 15.0, cacheReadsPrice: 0.25 },
+			{ name: "priority", contextWindow: 1_050_000, inputPrice: 12.5, outputPrice: 75.0, cacheReadsPrice: 1.25 },
+		],
+		description: "GPT-5.6 Sol: OpenAI's flagship model for frontier reasoning, coding, and agentic workflows",
+	},
+	"gpt-5.6-terra": {
+		maxTokens: 128000,
+		contextWindow: 1_050_000,
+		includedTools: ["apply_patch"],
+		excludedTools: ["apply_diff", "write_to_file"],
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningEffort: ["none", "low", "medium", "high", "xhigh", "max"],
+		reasoningEffort: "medium",
+		inputPrice: 2.5,
+		outputPrice: 15.0,
+		cacheWritesPrice: 3.125,
+		cacheReadsPrice: 0.25,
+		longContextPricing: {
+			thresholdTokens: 272_000,
+			inputPriceMultiplier: 2,
+			outputPriceMultiplier: 1.5,
+			appliesToServiceTiers: ["default", "flex"],
+		},
+		supportsVerbosity: true,
+		supportsTemperature: false,
+		tiers: [
+			{ name: "flex", contextWindow: 1_050_000, inputPrice: 1.25, outputPrice: 7.5, cacheReadsPrice: 0.125 },
+			{ name: "priority", contextWindow: 1_050_000, inputPrice: 6.25, outputPrice: 37.5, cacheReadsPrice: 0.625 },
+		],
+		description: "GPT-5.6 Terra: Balanced everyday model with GPT-5.5-competitive performance at 2x lower cost",
+	},
+	"gpt-5.6-luna": {
+		maxTokens: 128000,
+		contextWindow: 400000,
+		includedTools: ["apply_patch"],
+		excludedTools: ["apply_diff", "write_to_file"],
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningEffort: ["none", "low", "medium", "high", "xhigh", "max"],
+		reasoningEffort: "medium",
+		inputPrice: 1.0,
+		outputPrice: 6.0,
+		cacheWritesPrice: 1.25,
+		cacheReadsPrice: 0.1,
+		supportsVerbosity: true,
+		supportsTemperature: false,
+		tiers: [{ name: "flex", contextWindow: 400000, inputPrice: 0.5, outputPrice: 3.0, cacheReadsPrice: 0.05 }],
+		description: "GPT-5.6 Luna: The fastest, most affordable member of the GPT-5.6 family",
+	},
 	"gpt-5.1-codex-max": {
 		maxTokens: 128000,
 		contextWindow: 400000,

src/api/providers/__tests__/openai-codex.spec.ts

@@ -22,7 +22,7 @@ describe("OpenAiCodexHandler.getModel", () => {
 		const handler = new OpenAiCodexHandler({ apiModelId: "not-a-real-model" })
 		const model = handler.getModel()
 
-		expect(model.id).toBe("gpt-5.3-codex")
+		expect(model.id).toBe("gpt-5.6-sol")
 		expect(model.info).toBeDefined()
 	})
 

src/api/providers/__tests__/openai-native.spec.ts

@@ -356,7 +356,7 @@ describe("OpenAiNativeHandler", () => {
 				openAiNativeApiKey: "test-api-key",
 			})
 			const modelInfo = handlerWithoutModel.getModel()
-			expect(modelInfo.id).toBe("gpt-5.1-codex-max") // Default model
+			expect(modelInfo.id).toBe("gpt-5.6-sol") // Default model
 			expect(modelInfo.info).toBeDefined()
 		})
 	})