diff --git a/src/Schemas/Anthropic/AnthropicStructuredHandler.php b/src/Schemas/Anthropic/AnthropicStructuredHandler.php
index 8398f00..6b8edf1 100644
--- a/src/Schemas/Anthropic/AnthropicStructuredHandler.php
+++ b/src/Schemas/Anthropic/AnthropicStructuredHandler.php
@@ -79,7 +79,7 @@ public static function buildPayload(Request $request, ?string $apiVersion): arra
             'system' => MessageMap::mapSystemMessages($request->systemPrompts()),
             'temperature' => $request->temperature(),
             'top_p' => $request->topP(),
-        ]);
+        ], fn ($value): bool => $value !== null);
     }
 
     protected function sendRequest(Request $request): void
diff --git a/src/Schemas/Anthropic/AnthropicTextHandler.php b/src/Schemas/Anthropic/AnthropicTextHandler.php
index 000a475..03a2d33 100644
--- a/src/Schemas/Anthropic/AnthropicTextHandler.php
+++ b/src/Schemas/Anthropic/AnthropicTextHandler.php
@@ -80,7 +80,7 @@ public static function buildPayload(Request $request, ?string $apiVersion): arra
             'top_p' => $request->topP(),
             'tools' => ToolMap::map($request->tools()),
             'tool_choice' => ToolChoiceMap::map($request->toolChoice()),
-        ]);
+        ], fn ($value): bool => $value !== null);
     }
 
     protected function sendRequest(Request $request): void
diff --git a/src/Schemas/Converse/ConverseStructuredHandler.php b/src/Schemas/Converse/ConverseStructuredHandler.php
index a6800e8..aa92e40 100644
--- a/src/Schemas/Converse/ConverseStructuredHandler.php
+++ b/src/Schemas/Converse/ConverseStructuredHandler.php
@@ -77,7 +77,7 @@ public static function buildPayload(Request $request): array
                 'maxTokens' => $request->maxTokens(),
                 'temperature' => $request->temperature(),
                 'topP' => $request->topP(),
-            ]),
+            ], fn ($value): bool => $value !== null),
             'messages' => MessageMap::map($request->messages()),
             'performanceConfig' => $request->providerOptions('performanceConfig'),
             'promptVariables' => $request->providerOptions('promptVariables'),
diff --git a/src/Schemas/Converse/ConverseTextHandler.php b/src/Schemas/Converse/ConverseTextHandler.php
index ef2b1d5..c84da55 100644
--- a/src/Schemas/Converse/ConverseTextHandler.php
+++ b/src/Schemas/Converse/ConverseTextHandler.php
@@ -75,7 +75,7 @@ public static function buildPayload(Request $request, int $stepCount = 0): array
                 'maxTokens' => $request->maxTokens(),
                 'temperature' => $request->temperature(),
                 'topP' => $request->topP(),
-            ]),
+            ], fn ($value): bool => $value !== null),
             'messages' => MessageMap::map($request->messages()),
             'system' => MessageMap::mapSystemMessages($request->systemPrompts()),
             'toolConfig' => $request->tools() === []
diff --git a/tests/Schemas/Anthropic/AnthropicStructuredHandlerTest.php b/tests/Schemas/Anthropic/AnthropicStructuredHandlerTest.php
index 101a3bd..a84fb68 100644
--- a/tests/Schemas/Anthropic/AnthropicStructuredHandlerTest.php
+++ b/tests/Schemas/Anthropic/AnthropicStructuredHandlerTest.php
@@ -4,6 +4,8 @@
 
 namespace Tests\Schemas\Anthropic;
 
+use Illuminate\Http\Client\Request;
+use Illuminate\Support\Facades\Http;
 use Prism\Prism\Prism;
 use Prism\Prism\Schema\BooleanSchema;
 use Prism\Prism\Schema\ObjectSchema;
@@ -41,3 +43,32 @@
     expect($response->structured['game_time'])->toBeString();
     expect($response->structured['coat_required'])->toBeBool();
 });
+
+it('does not remove 0 values from payloads', function (): void {
+    FixtureResponse::fakeResponseSequence('invoke', 'anthropic/structured');
+
+    $schema = new ObjectSchema(
+        'output',
+        'the output object',
+        [
+            new StringSchema('weather', 'The weather forecast'),
+            new StringSchema('game_time', 'The tigers game time'),
+            new BooleanSchema('coat_required', 'whether a coat is required'),
+        ],
+        ['weather', 'game_time', 'coat_required']
+    );
+
+    Prism::structured()
+        ->withSchema($schema)
+        ->using('bedrock', 'anthropic.claude-3-5-haiku-20241022-v1:0')
+        ->withProviderOptions([
+            'guardRailConfig' => null,
+        ])
+        ->withMaxTokens(2048)
+        ->usingTemperature(0)
+        ->asStructured();
+
+    Http::assertSent(fn (Request $request): \Pest\Mixins\Expectation|\Pest\Expectation => expect($request->data())->toMatchArray([
+        'temperature' => 0,
+    ]));
+});
diff --git a/tests/Schemas/Anthropic/AnthropicTextHandlerTest.php b/tests/Schemas/Anthropic/AnthropicTextHandlerTest.php
index f629c6f..202f1fc 100644
--- a/tests/Schemas/Anthropic/AnthropicTextHandlerTest.php
+++ b/tests/Schemas/Anthropic/AnthropicTextHandlerTest.php
@@ -193,3 +193,17 @@
 
     Http::assertSent(fn (Request $request): bool => $request->header('explicitPromptCaching')[0] === 'enabled');
 });
+
+it('does not remove 0 values from payloads', function (): void {
+    FixtureResponse::fakeResponseSequence('invoke', 'anthropic/generate-text-with-a-prompt');
+
+    Prism::text()
+        ->using('bedrock', 'anthropic.claude-3-5-haiku-20241022-v1:0')
+        ->withPrompt('Who are you?')
+        ->usingTemperature(0)
+        ->asText();
+
+    Http::assertSent(fn (Request $request): \Pest\Mixins\Expectation|\Pest\Expectation => expect($request->data())->toMatchArray([
+        'temperature' => 0,
+    ]));
+});
diff --git a/tests/Schemas/Converse/ConverseStructuredHandlerTest.php b/tests/Schemas/Converse/ConverseStructuredHandlerTest.php
index fcb3404..60c632a 100644
--- a/tests/Schemas/Converse/ConverseStructuredHandlerTest.php
+++ b/tests/Schemas/Converse/ConverseStructuredHandlerTest.php
@@ -4,6 +4,8 @@
 
 namespace Tests\Schemas\Converse;
 
+use Illuminate\Http\Client\Request;
+use Illuminate\Support\Facades\Http;
 use Prism\Bedrock\Enums\BedrockSchema;
 use Prism\Prism\Prism;
 use Prism\Prism\Schema\BooleanSchema;
@@ -94,3 +96,36 @@
 
     $fake->assertRequest(fn (array $requests): mixed => expect($requests[0]->providerOptions())->toBe($providerOptions));
 });
+
+it('does not remove 0 values from payloads', function (): void {
+    FixtureResponse::fakeResponseSequence('converse', 'converse/structured');
+
+    $schema = new ObjectSchema(
+        'output',
+        'the output object',
+        [
+            new StringSchema('weather', 'The weather forecast'),
+            new StringSchema('game_time', 'The tigers game time'),
+            new BooleanSchema('coat_required', 'whether a coat is required'),
+        ],
+        ['weather', 'game_time', 'coat_required']
+    );
+
+    Prism::structured()
+        ->withSchema($schema)
+        ->using('bedrock', 'anthropic.claude-3-5-haiku-20241022-v1:0')
+        ->withProviderOptions([
+            'apiSchema' => BedrockSchema::Converse,
+            'guardRailConfig' => null,
+        ])
+        ->withMaxTokens(2048)
+        ->usingTemperature(0)
+        ->asStructured();
+
+    Http::assertSent(fn (Request $request): \Pest\Mixins\Expectation|\Pest\Expectation => expect($request->data())->toMatchArray([
+        'inferenceConfig' => [
+            'maxTokens' => 2048,
+            'temperature' => 0,
+        ],
+    ])->not()->toHaveKey('guardRailConfig'));
+});
diff --git a/tests/Schemas/Converse/ConverseTextHandlerTest.php b/tests/Schemas/Converse/ConverseTextHandlerTest.php
index 8fd2aaf..3e7a4d0 100644
--- a/tests/Schemas/Converse/ConverseTextHandlerTest.php
+++ b/tests/Schemas/Converse/ConverseTextHandlerTest.php
@@ -273,3 +273,20 @@
 
     $fake->assertRequest(fn (array $requests): mixed => expect($requests[0]->providerOptions())->toBe($providerOptions));
 });
+
+it('does not remove zero values from payload', function (): void {
+    FixtureResponse::fakeResponseSequence('converse', 'converse/generate-text-with-a-prompt');
+
+    Prism::text()
+        ->using('bedrock', 'amazon.nova-micro-v1:0')
+        ->withPrompt('Who are you?')
+        ->usingTemperature(0)
+        ->asText();
+
+    Http::assertSent(fn (Request $request): \Pest\Mixins\Expectation|\Pest\Expectation => expect($request->data())->toMatchArray([
+        'inferenceConfig' => [
+            'temperature' => 0,
+            'maxTokens' => 2048,
+        ],
+    ]));
+});