diff --git a/packages/ai/CHANGELOG.md b/packages/ai/CHANGELOG.md
index 86b9ebaa..241b7792 100644
--- a/packages/ai/CHANGELOG.md
+++ b/packages/ai/CHANGELOG.md
@@ -5,6 +5,11 @@
 ### Added
 
 - Added `onResponse` to `StreamOptions` so callers can inspect provider HTTP status and headers after each response arrives and before the response stream is consumed ([#3128](https://github.com/badlogic/pi-mono/issues/3128))
+- Added `thinkingDisplay` (`"summarized" | "omitted"`) to `AnthropicOptions` and `BedrockOptions`, wiring it through to the Anthropic/Bedrock `thinking` config. Defaults to `"summarized"` so Claude Opus 4.7 and Mythos Preview keep returning thinking text; set it to `"omitted"` to skip thinking streaming for faster time-to-first-text-token.
+
+### Changed
+
+- Bumped `@anthropic-ai/sdk` to `0.90.0` so `ThinkingConfigAdaptive.display` and `ThinkingConfigEnabled.display` are typed by the SDK.
 
 ## [0.67.5] - 2026-04-16
 
diff --git a/packages/ai/src/index.ts b/packages/ai/src/index.ts
index 1c885a85..6a1ee2c0 100644
--- a/packages/ai/src/index.ts
+++ b/packages/ai/src/index.ts
@@ -4,8 +4,8 @@ export { Type } from "@sinclair/typebox";
 export * from "./api-registry.js";
 export * from "./env-api-keys.js";
 export * from "./models.js";
-export type { BedrockOptions } from "./providers/amazon-bedrock.js";
-export type { AnthropicOptions } from "./providers/anthropic.js";
+export type { BedrockOptions, BedrockThinkingDisplay } from "./providers/amazon-bedrock.js";
+export type { AnthropicEffort, AnthropicOptions, AnthropicThinkingDisplay } from "./providers/anthropic.js";
 export type { AzureOpenAIResponsesOptions } from "./providers/azure-openai-responses.js";
 export * from "./providers/faux.js";
 export type { GoogleOptions } from "./providers/google.js";
diff --git a/packages/ai/src/providers/amazon-bedrock.ts b/packages/ai/src/providers/amazon-bedrock.ts
index f72356b5..4b2e61f6 100644
--- a/packages/ai/src/providers/amazon-bedrock.ts
+++ b/packages/ai/src/providers/amazon-bedrock.ts
@@ -46,6 +46,8 @@ import { sanitizeSurrogates } from "../utils/sanitize-unicode.js";
 import { adjustMaxTokensForThinking, buildBaseOptions, clampReasoning } from "./simple-options.js";
 import { transformMessages } from "./transform-messages.js";
 
+export type BedrockThinkingDisplay = "summarized" | "omitted";
+
 export interface BedrockOptions extends StreamOptions {
 	region?: string;
 	profile?: string;
@@ -56,6 +58,17 @@ export interface BedrockOptions extends StreamOptions {
 	thinkingBudgets?: ThinkingBudgets;
 	/* Only supported by Claude 4.x models, see https://docs.aws.amazon.com/bedrock/latest/userguide/claude-messages-extended-thinking.html#claude-messages-extended-thinking-tool-use-interleaved */
 	interleavedThinking?: boolean;
+	/**
+	 * Controls how Claude's thinking content is returned in responses.
+	 * - "summarized": Thinking blocks contain summarized thinking text (default here).
+	 * - "omitted": Thinking content is redacted but the signature still travels back
+	 *   for multi-turn continuity, reducing time-to-first-text-token.
+	 *
+	 * Note: Anthropic's API default for Claude Opus 4.7 and Mythos Preview is
+	 * "omitted". We default to "summarized" here to keep behavior consistent with
+	 * older Claude 4 models. Only applies to Claude models on Bedrock.
+	 */
+	thinkingDisplay?: BedrockThinkingDisplay;
 	/** Key-value pairs attached to the inference request for cost allocation tagging.
 	 * Keys: max 64 chars, no `aws:` prefix. Values: max 256 chars. Max 50 pairs.
 	 * Tags appear in AWS Cost Explorer split cost allocation data.
@@ -759,9 +772,12 @@ function buildAdditionalModelRequestFields(
 	}
 
 	if (model.id.includes("anthropic.claude") || model.id.includes("anthropic/claude")) {
+		// Default to "summarized" so Opus 4.7 and Mythos Preview behave like
+		// older Claude 4 models (whose API default is also "summarized").
+		const display: BedrockThinkingDisplay = options.thinkingDisplay ?? "summarized";
 		const result: Record<string, any> = supportsAdaptiveThinking(model.id)
 			? {
-					thinking: { type: "adaptive" },
+					thinking: { type: "adaptive", display },
 					output_config: { effort: mapThinkingLevelToEffort(options.reasoning, model.id) },
 				}
 			: (() => {
@@ -781,6 +797,7 @@ function buildAdditionalModelRequestFields(
 						thinking: {
 							type: "enabled",
 							budget_tokens: budget,
+							display,
 						},
 					};
 				})();
diff --git a/packages/ai/src/providers/anthropic.ts b/packages/ai/src/providers/anthropic.ts
index 861bab8a..47686327 100644
--- a/packages/ai/src/providers/anthropic.ts
+++ b/packages/ai/src/providers/anthropic.ts
@@ -156,6 +156,8 @@ function convertContentBlocks(content: (TextContent | ImageContent)[]):
 
 export type AnthropicEffort = "low" | "medium" | "high" | "xhigh" | "max";
 
+export type AnthropicThinkingDisplay = "summarized" | "omitted";
+
 export interface AnthropicOptions extends StreamOptions {
 	/**
 	 * Enable extended thinking.
@@ -179,6 +181,18 @@ export interface AnthropicOptions extends StreamOptions {
 	 * Ignored for older models.
 	 */
 	effort?: AnthropicEffort;
+	/**
+	 * Controls how thinking content is returned in API responses.
+	 * - "summarized": Thinking blocks contain summarized thinking text (default here).
+	 * - "omitted": Thinking blocks return an empty thinking field; the encrypted
+	 *   signature still travels back for multi-turn continuity. Use for faster
+	 *   time-to-first-text-token when your UI does not surface thinking.
+	 *
+	 * Note: Anthropic's API default for Claude Opus 4.7 and Claude Mythos Preview
+	 * is "omitted". We default to "summarized" here to keep behavior consistent
+	 * with older Claude 4 models. Set this explicitly to "omitted" to opt in.
+	 */
+	thinkingDisplay?: AnthropicThinkingDisplay;
 	interleavedThinking?: boolean;
 	toolChoice?: "auto" | "any" | "none" | { type: "tool"; name: string };
 	/**
@@ -678,11 +692,14 @@ function buildParams(
 	// budget-based (older models), or explicitly disabled.
 	if (model.reasoning) {
 		if (options?.thinkingEnabled) {
+			// Default to "summarized" so Opus 4.7 and Mythos Preview behave like
+			// older Claude 4 models (whose API default is also "summarized").
+			const display: AnthropicThinkingDisplay = options.thinkingDisplay ?? "summarized";
 			if (supportsAdaptiveThinking(model.id)) {
 				// Adaptive thinking: Claude decides when and how much to think.
-				// The Anthropic SDK types can lag newly supported effort values such as "xhigh".
-				params.thinking = { type: "adaptive" };
+				params.thinking = { type: "adaptive", display };
 				if (options.effort) {
+					// The Anthropic SDK types can lag newly supported effort values such as "xhigh".
 					params.output_config =
 						options.effort === "xhigh"
 							? ({ effort: options.effort } as unknown as NonNullable<
@@ -695,6 +712,7 @@ function buildParams(
 				params.thinking = {
 					type: "enabled",
 					budget_tokens: options.thinkingBudgetTokens || 1024,
+					display,
 				};
 			}
 		} else if (options?.thinkingEnabled === false) {