release: 0.10.0

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "0.9.0"
+  ".": "0.10.0"
 }

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 31
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/anthropic%2Fanthropic-efe26b096126c693462514b8cbd3ec3e376569232becbfb730cd26fb31c7c7e3.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/anthropic%2Fanthropic-04225437444990f383d0581df2f07022baab6ad510de0f3a8bd6b07c38d83cc9.yml
 openapi_spec_hash: cae9199aabfd7b87f0ff2dcc10760c92
-config_hash: 79b43ba5cfb2877d888e0d5ecab99d41
+config_hash: fcc34074db6eaf64bc99b578c6c82c61

CHANGELOG.md

@@ -1,5 +1,19 @@
 # Changelog
 
+## 0.10.0 (2026-04-07)
+
+Full Changelog: [v0.9.0...v0.10.0](https://github.com/anthropics/anthropic-sdk-php/compare/v0.9.0...v0.10.0)
+
+### Features
+
+* **api:** Add support for claude-mythos-preview ([140ef63](https://github.com/anthropics/anthropic-sdk-php/commit/140ef63deb83be8c2b787e4b0c5a3275e61a1ed1))
+* **vertex:** add support for US multi-region endpoint ([347a703](https://github.com/anthropics/anthropic-sdk-php/commit/347a703e1ee910668eac06b3f6fdffa44c20ecbc))
+
+
+### Chores
+
+* **client:** internal updates ([553ec56](https://github.com/anthropics/anthropic-sdk-php/commit/553ec5616546f1d1fdeeb5b23d10c8c58855998c))
+
 ## 0.9.0 (2026-04-01)
 
 Full Changelog: [v0.8.0...v0.9.0](https://github.com/anthropics/anthropic-sdk-php/compare/v0.8.0...v0.9.0)

README.md

@@ -13,7 +13,7 @@ Full documentation is available at **[platform.claude.com/docs/en/api/sdks/php](
 <!-- x-release-please-start-version -->
 
 ```sh
-composer require "anthropic-ai/sdk:^0.9.0"
+composer require "anthropic-ai/sdk:^0.10.0"
 ```
 
 <!-- x-release-please-end -->

src/Aws/Client.php

@@ -10,7 +10,7 @@
 /**
  * Anthropic AWS gateway client.
  *
- * Connects to the Anthropic AWS gateway at https://gateway.{region}.api.aws
+ * Connects to the Anthropic AWS gateway at https://aws-external-anthropic.{region}.api.aws
  * with support for x-api-key auth and AWS SigV4 signing.
  *
  * Auth is resolved by precedence:
@@ -44,7 +44,7 @@ public function __construct(
     ) {
         $this->auth = new AwsAuth(
             serviceName: 'aws-external-anthropic',
-            baseUrlPattern: 'https://gateway.{region}.api.aws',
+            baseUrlPattern: 'https://aws-external-anthropic.{region}.api.aws',
             apiKeyEnvVar: 'ANTHROPIC_AWS_API_KEY',
             baseUrlEnvVar: 'ANTHROPIC_AWS_BASE_URL',
             workspaceIdEnvVar: 'ANTHROPIC_AWS_WORKSPACE_ID',

src/Beta/Messages/Batches/BatchCreateParams/Request/Params.php

@@ -264,6 +264,8 @@ final class Params implements BaseModel
     public string|array|null $system;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not support setting temperature. A value of 1.0 of will be accepted for backwards compatibility, all other values will be rejected with a 400 error.
+     *
      * Amount of randomness injected into the response.
      *
      * Defaults to `1.0`. Ranges from `0.0` to `1.0`. Use `temperature` closer to `0.0` for analytical / multiple choice, and closer to `1.0` for creative and generative tasks.
@@ -362,6 +364,8 @@ final class Params implements BaseModel
     public ?array $tools;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not accept top_k; any value will be rejected with a 400 error.
+     *
      * Only sample from the top K options for each subsequent token.
      *
      * Used to remove "long tail" low probability responses. [Learn more technical details here](https://towardsdatascience.com/how-to-sample-from-language-models-682bceb97277).
@@ -372,6 +376,8 @@ final class Params implements BaseModel
     public ?int $topK;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not support setting top_p. A value >= 0.99 will be accepted for backwards compatibility, all other values will be rejected with a 400 error.
+     *
      * Use nucleus sampling.
      *
      * In nucleus sampling, we compute the cumulative distribution over all the options for each subsequent token in decreasing probability order and cut it off once it reaches a particular probability specified by `top_p`. You should either alter `temperature` or `top_p`, but not both.

src/Beta/Messages/MessageCreateParams.php

@@ -245,6 +245,8 @@ final class MessageCreateParams implements BaseModel
     public string|array|null $system;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not support setting temperature. A value of 1.0 of will be accepted for backwards compatibility, all other values will be rejected with a 400 error.
+     *
      * Amount of randomness injected into the response.
      *
      * Defaults to `1.0`. Ranges from `0.0` to `1.0`. Use `temperature` closer to `0.0` for analytical / multiple choice, and closer to `1.0` for creative and generative tasks.
@@ -343,6 +345,8 @@ final class MessageCreateParams implements BaseModel
     public ?array $tools;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not accept top_k; any value will be rejected with a 400 error.
+     *
      * Only sample from the top K options for each subsequent token.
      *
      * Used to remove "long tail" low probability responses. [Learn more technical details here](https://towardsdatascience.com/how-to-sample-from-language-models-682bceb97277).
@@ -353,6 +357,8 @@ final class MessageCreateParams implements BaseModel
     public ?int $topK;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not support setting top_p. A value >= 0.99 will be accepted for backwards compatibility, all other values will be rejected with a 400 error.
+     *
      * Use nucleus sampling.
      *
      * In nucleus sampling, we compute the cumulative distribution over all the options for each subsequent token in decreasing probability order and cut it off once it reaches a particular probability specified by `top_p`. You should either alter `temperature` or `top_p`, but not both.

src/Messages/Batches/BatchCreateParams/Request/Params.php

@@ -214,6 +214,8 @@ final class Params implements BaseModel
     public string|array|null $system;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not support setting temperature. A value of 1.0 of will be accepted for backwards compatibility, all other values will be rejected with a 400 error.
+     *
      * Amount of randomness injected into the response.
      *
      * Defaults to `1.0`. Ranges from `0.0` to `1.0`. Use `temperature` closer to `0.0` for analytical / multiple choice, and closer to `1.0` for creative and generative tasks.
@@ -312,6 +314,8 @@ final class Params implements BaseModel
     public ?array $tools;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not accept top_k; any value will be rejected with a 400 error.
+     *
      * Only sample from the top K options for each subsequent token.
      *
      * Used to remove "long tail" low probability responses. [Learn more technical details here](https://towardsdatascience.com/how-to-sample-from-language-models-682bceb97277).
@@ -322,6 +326,8 @@ final class Params implements BaseModel
     public ?int $topK;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not support setting top_p. A value >= 0.99 will be accepted for backwards compatibility, all other values will be rejected with a 400 error.
+     *
      * Use nucleus sampling.
      *
      * In nucleus sampling, we compute the cumulative distribution over all the options for each subsequent token in decreasing probability order and cut it off once it reaches a particular probability specified by `top_p`. You should either alter `temperature` or `top_p`, but not both.

src/Messages/MessageCreateParams.php

@@ -196,6 +196,8 @@ final class MessageCreateParams implements BaseModel
     public string|array|null $system;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not support setting temperature. A value of 1.0 of will be accepted for backwards compatibility, all other values will be rejected with a 400 error.
+     *
      * Amount of randomness injected into the response.
      *
      * Defaults to `1.0`. Ranges from `0.0` to `1.0`. Use `temperature` closer to `0.0` for analytical / multiple choice, and closer to `1.0` for creative and generative tasks.
@@ -294,6 +296,8 @@ final class MessageCreateParams implements BaseModel
     public ?array $tools;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not accept top_k; any value will be rejected with a 400 error.
+     *
      * Only sample from the top K options for each subsequent token.
      *
      * Used to remove "long tail" low probability responses. [Learn more technical details here](https://towardsdatascience.com/how-to-sample-from-language-models-682bceb97277).
@@ -304,6 +308,8 @@ final class MessageCreateParams implements BaseModel
     public ?int $topK;
 
     /**
+     * @deprecated Deprecated. Models released after Claude Opus 4.6 do not support setting top_p. A value >= 0.99 will be accepted for backwards compatibility, all other values will be rejected with a 400 error.
+     *
      * Use nucleus sampling.
      *
      * In nucleus sampling, we compute the cumulative distribution over all the options for each subsequent token in decreasing probability order and cut it off once it reaches a particular probability specified by `top_p`. You should either alter `temperature` or `top_p`, but not both.

src/Messages/Model.php

@@ -14,6 +14,8 @@
 enum Model: string
 {
     // Anthropic model identifiers
+
+    case CLAUDE_MYTHOS_PREVIEW = 'claude-mythos-preview';
 
     case CLAUDE_OPUS_4_6 = 'claude-opus-4-6';
 

src/Version.php

@@ -5,5 +5,5 @@
 namespace Anthropic;
 
 // x-release-please-start-version
-const VERSION = '0.9.0';
+const VERSION = '0.10.0';
 // x-release-please-end

src/Vertex/Client.php

@@ -55,7 +55,11 @@ private function __construct(
         );
 
         // @see https://docs.cloud.google.com/vertex-ai/docs/reference/rest#rest_endpoints
-        $baseUrl = 'https://'.$location.'-aiplatform.googleapis.com';
+        $baseUrl = match ($location) {
+            'global' => 'https://aiplatform.googleapis.com',
+            'us' => 'https://aiplatform.us.rep.googleapis.com',
+            default => 'https://'.$location.'-aiplatform.googleapis.com',
+        };
 
         parent::__construct(
             headers: [],

tests/Aws/ClientTest.php

@@ -243,7 +243,7 @@ public function testRegionFromAwsRegionEnv(): void
         $client->messages->create(1024, [], 'claude-haiku-4-5');
         $request = $this->getLastRequest();
 
-        $this->assertSame('gateway.eu-west-1.api.aws', $request->getUri()->getHost());
+        $this->assertSame('aws-external-anthropic.eu-west-1.api.aws', $request->getUri()->getHost());
     }
 
     public function testRegionFromAwsDefaultRegionEnv(): void
@@ -259,7 +259,7 @@ public function testRegionFromAwsDefaultRegionEnv(): void
         $client->messages->create(1024, [], 'claude-haiku-4-5');
         $request = $this->getLastRequest();
 
-        $this->assertSame('gateway.ap-southeast-1.api.aws', $request->getUri()->getHost());
+        $this->assertSame('aws-external-anthropic.ap-southeast-1.api.aws', $request->getUri()->getHost());
     }
 
     public function testAwsRegionEnvTakesPrecedenceOverDefault(): void
@@ -276,7 +276,7 @@ public function testAwsRegionEnvTakesPrecedenceOverDefault(): void
         $client->messages->create(1024, [], 'claude-haiku-4-5');
         $request = $this->getLastRequest();
 
-        $this->assertSame('gateway.us-east-1.api.aws', $request->getUri()->getHost());
+        $this->assertSame('aws-external-anthropic.us-east-1.api.aws', $request->getUri()->getHost());
     }
 
     public function testExplicitRegionOverridesEnv(): void
@@ -293,7 +293,7 @@ public function testExplicitRegionOverridesEnv(): void
         $client->messages->create(1024, [], 'claude-haiku-4-5');
         $request = $this->getLastRequest();
 
-        $this->assertSame('gateway.us-west-2.api.aws', $request->getUri()->getHost());
+        $this->assertSame('aws-external-anthropic.us-west-2.api.aws', $request->getUri()->getHost());
     }
 
     // ── Base URL resolution ─────────────────────────────────────────
@@ -305,7 +305,7 @@ public function testBaseUrlDerivedFromRegion(): void
         $client->messages->create(1024, [], 'claude-haiku-4-5');
         $request = $this->getLastRequest();
 
-        $this->assertSame('gateway.us-east-1.api.aws', $request->getUri()->getHost());
+        $this->assertSame('aws-external-anthropic.us-east-1.api.aws', $request->getUri()->getHost());
     }
 
     public function testExplicitBaseUrlOverridesRegion(): void

tests/Services/Beta/MessagesTest.php

@@ -140,7 +140,7 @@ public function testCountTokens(): void
     {
         $result = $this->client->beta->messages->countTokens(
             messages: [['content' => 'string', 'role' => 'user']],
-            model: 'claude-opus-4-6',
+            model: 'claude-mythos-preview',
         );
 
         // @phpstan-ignore-next-line method.alreadyNarrowedType
@@ -152,7 +152,7 @@ public function testCountTokensWithOptionalParams(): void
     {
         $result = $this->client->beta->messages->countTokens(
             messages: [['content' => 'string', 'role' => 'user']],
-            model: 'claude-opus-4-6',
+            model: 'claude-mythos-preview',
             cacheControl: ['type' => 'ephemeral', 'ttl' => '5m'],
             contextManagement: [
                 'edits' => [

tests/Services/MessagesTest.php

@@ -109,7 +109,7 @@ public function testCountTokens(): void
     {
         $result = $this->client->messages->countTokens(
             messages: [['content' => 'string', 'role' => 'user']],
-            model: 'claude-opus-4-6',
+            model: 'claude-mythos-preview',
         );
 
         // @phpstan-ignore-next-line method.alreadyNarrowedType
@@ -121,7 +121,7 @@ public function testCountTokensWithOptionalParams(): void
     {
         $result = $this->client->messages->countTokens(
             messages: [['content' => 'string', 'role' => 'user']],
-            model: 'claude-opus-4-6',
+            model: 'claude-mythos-preview',
             cacheControl: ['type' => 'ephemeral', 'ttl' => '5m'],
             outputConfig: [
                 'effort' => 'low',

tests/Vertex/ClientTest.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace Tests\Vertex;
+
+use Anthropic\Vertex\Client;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @internal
+ *
+ * @coversNothing
+ */
+class ClientTest extends TestCase
+{
+    /**
+     * @dataProvider locationBaseUrlProvider
+     */
+    public function testBaseUrlForLocation(string $location, string $expectedHost): void
+    {
+        $client = $this->createClientWithLocation($location);
+
+        $reflection = new \ReflectionMethod($client, 'getBaseUrl');
+        $baseUrl = $reflection->invoke($client);
+
+        $this->assertInstanceOf(\Psr\Http\Message\UriInterface::class, $baseUrl);
+        $this->assertSame($expectedHost, (string) $baseUrl);
+    }
+
+    /**
+     * @return iterable<string, array{string, string}>
+     */
+    public static function locationBaseUrlProvider(): iterable
+    {
+        yield 'global region' => ['global', 'https://aiplatform.googleapis.com'];
+
+        yield 'us region' => ['us', 'https://aiplatform.us.rep.googleapis.com'];
+
+        yield 'us-central1 region' => ['us-central1', 'https://us-central1-aiplatform.googleapis.com'];
+
+        yield 'europe-west1 region' => ['europe-west1', 'https://europe-west1-aiplatform.googleapis.com'];
+
+        yield 'asia-southeast1 region' => ['asia-southeast1', 'https://asia-southeast1-aiplatform.googleapis.com'];
+    }
+
+    private function createClientWithLocation(string $location): Client
+    {
+        $reflection = new \ReflectionClass(Client::class);
+        $constructor = $reflection->getConstructor();
+        assert(null !== $constructor);
+
+        $client = $reflection->newInstanceWithoutConstructor();
+
+        $credentialsProvider = function () {
+            throw new \RuntimeException('Should not be called in tests');
+        };
+
+        $constructor->invoke($client, $credentialsProvider, $location, 'test-project');
+
+        return $client;
+    }
+}