Add Opus 4.5 and clean-up naming & remove legacy models for anthropic (#1892)

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<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Adds support for Anthropic Claude Opus 4.5 and standardizes Sonnet
naming. Removes legacy 3.x Anthropic models and updates tests to use the
new names.

- **New Features**
  - Added "Claude Opus 4.5" with 32k max output and 200k context.

- **Migration**
- Names standardized to "Claude Sonnet 4" and "Claude Sonnet 4.5".
Update any model selections and tests.
- Removed Anthropic 3.x models: Claude 3.7 Sonnet, Claude 3.5 Sonnet,
Claude 3.5 Haiku, and their Bedrock variants.

<sup>Written for commit fb0aff0bf5e21e1b57bc8744ed9643b863b888d4.
Summary will update automatically on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

e2e-tests/engine.spec.ts

@@ -25,7 +25,7 @@ testSkipIfWindows(
     await po.setUpDyadPro();
     // By default, it's using auto which points to Flash 2.5 and doesn't
     // use engine.
-    await po.selectModel({ provider: "Anthropic", model: "Claude 4 Sonnet" });
+    await po.selectModel({ provider: "Anthropic", model: "Claude Sonnet 4" });
     await po.sendPrompt("[dump] tc=turbo-edits");
 
     await po.snapshotServerDump("request");

src/ipc/shared/language_model_constants.ts

@@ -122,9 +122,20 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
   ],
   // https://docs.anthropic.com/en/docs/about-claude/models/all-models#model-comparison-table
   anthropic: [
+    {
+      name: "claude-opus-4-5",
+      displayName: "Claude Opus 4.5",
+      description:
+        "Anthropic's best model for coding (note: this model is very expensive!)",
+      // Set to 32k since context window is 1M tokens
+      maxOutputTokens: 32_000,
+      contextWindow: 200_000,
+      temperature: 0,
+      dollarSigns: 5,
+    },
     {
       name: "claude-sonnet-4-5-20250929",
-      displayName: "Claude 4.5 Sonnet",
+      displayName: "Claude Sonnet 4.5",
       description:
         "Anthropic's best model for coding (note: >200k tokens is very expensive!)",
       // Set to 32k since context window is 1M tokens
@@ -135,7 +146,7 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
     },
     {
       name: "claude-sonnet-4-20250514",
-      displayName: "Claude 4 Sonnet",
+      displayName: "Claude Sonnet 4",
       description: "Excellent coder (note: >200k tokens is very expensive!)",
       // Set to 32k since context window is 1M tokens
       maxOutputTokens: 32_000,
@@ -143,37 +154,6 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       temperature: 0,
       dollarSigns: 5,
     },
-    {
-      name: "claude-3-7-sonnet-latest",
-      displayName: "Claude 3.7 Sonnet",
-      description: "Excellent coder",
-      // Technically the max output tokens is 64k, *however* if the user has a lot of input tokens,
-      // then setting a high max output token will cause the request to fail because
-      // the max output tokens is *included* in the context window limit, see:
-      // 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,
-      dollarSigns: 4,
-    },
-    {
-      name: "claude-3-5-sonnet-20241022",
-      displayName: "Claude 3.5 Sonnet",
-      description: "Good coder, excellent at following instructions",
-      maxOutputTokens: 8_000,
-      contextWindow: 200_000,
-      temperature: 0,
-      dollarSigns: 4,
-    },
-    {
-      name: "claude-3-5-haiku-20241022",
-      displayName: "Claude 3.5 Haiku",
-      description: "Lightweight coder",
-      maxOutputTokens: 8_000,
-      contextWindow: 200_000,
-      temperature: 0,
-      dollarSigns: 2,
-    },
   ],
   google: [
     // https://ai.google.dev/gemini-api/docs/models#gemini-3-pro
@@ -466,22 +446,6 @@ export const MODEL_OPTIONS: Record<string, ModelOption[]> = {
       contextWindow: 1_000_000,
       temperature: 0,
     },
-    {
-      name: "us.anthropic.claude-3-7-sonnet-20250219-v1:0",
-      displayName: "Claude 3.7 Sonnet",
-      description: "Excellent coder",
-      maxOutputTokens: 16_000,
-      contextWindow: 200_000,
-      temperature: 0,
-    },
-    {
-      name: "us.anthropic.claude-3-5-sonnet-20241022-v2:0",
-      displayName: "Claude 3.5 Sonnet",
-      description: "Good coder, excellent at following instructions",
-      maxOutputTokens: 8_000,
-      contextWindow: 200_000,
-      temperature: 0,
-    },
   ],
 };