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fix(mcp): replace retired claude-sonnet-4-5 as the default Anthropic model #1754

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fix(mcp): replace retired claude-sonnet-4-5 as the default Anthropic model #1754

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2dfef7e
fix(mcp): replace retired claude-sonnet-4-5 as the default Anthropic …
pcbeingused333 Oct 30, 2026
37641eb
fix(mcp): default the Anthropic model to claude-sonnet-5-5
pcbeingused333 Oct 30, 2026
2710f1e
test(mcp): drop the default-model test
pcbeingused333 Oct 30, 2026
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4 changes: 2 additions & 2 deletions packages/mcp-core/src/internal/agents/anthropic-provider.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ import type { LanguageModel } from "ai";
import { USER_AGENT } from "../../version";

// Default configuration constants
const DEFAULT_ANTHROPIC_MODEL = "claude-sonnet-4-5";
const DEFAULT_ANTHROPIC_MODEL = "claude-sonnet-5-5";

// Module-level state for baseURL (set only via explicit configuration, not env vars)
let configuredBaseUrl: string | undefined;
Expand All @@ -21,7 +21,7 @@ export function setAnthropicBaseUrl(baseUrl: string | undefined): void {
*
* Configuration:
* - ANTHROPIC_API_KEY: API key for authentication (required)
* - ANTHROPIC_MODEL: Model to use (default: "claude-sonnet-4-5") - env var OK
* - ANTHROPIC_MODEL: Model to use (default: "claude-sonnet-5-5") - env var OK
* - Base URL: Must be set via setAnthropicBaseUrl() - NOT from env vars (security risk)
*/
export function getAnthropicModel(model?: string): LanguageModel {
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4 changes: 2 additions & 2 deletions packages/mcp-server/src/cli/usage.ts
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Expand Up @@ -26,7 +26,7 @@ Embedded agent configuration:
--openai-base-url <url> Override OpenAI API base URL
--openai-model <model> Override OpenAI model (default: gpt-5)
--anthropic-base-url <url> Override Anthropic API base URL
--anthropic-model <model> Override Anthropic model (default: claude-sonnet-4-5)
--anthropic-model <model> Override Anthropic model (default: claude-sonnet-5-5)

Session constraints:
--organization-slug <slug> Force all calls to an organization
Expand Down Expand Up @@ -83,7 +83,7 @@ Embedded agent configuration:
--openai-base-url <url> Override OpenAI API base URL
--openai-model <model> Override OpenAI model (default: gpt-5)
--anthropic-base-url <url> Override Anthropic API base URL
--anthropic-model <model> Override Anthropic model (default: claude-sonnet-4-5)
--anthropic-model <model> Override Anthropic model (default: claude-sonnet-5-5)

Session constraints:
--organization-slug <slug> Force all calls to an organization
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