fix(providers): drop deprecated temperature capability from claude-sonnet-5

Claude Sonnet 5 rejects the temperature parameter with a 400 ("`temperature` is deprecated for this model"), verified against the live Anthropic API. The model entry exposed temperature: { min: 0, max: 1 }, so supportsTemperature() returned true and the Anthropic request builder sent temperature whenever thinking was disabled, breaking those runs. Remove the capability (matching Opus 4.7/4.8, which omit it for the same reason) so temperature is never sent for Sonnet 5. Add a supportsTemperature regression assertion.

Author: waleedlatif1

apps/sim/providers/models.ts

@@ -678,7 +678,6 @@ export const PROVIDER_DEFINITIONS: Record<string, ProviderDefinition> = {
           updatedAt: '2026-06-30',
         },
         capabilities: {
-          temperature: { min: 0, max: 1 },
           nativeStructuredOutputs: true,
           maxOutputTokens: 128000,
           thinking: {

apps/sim/providers/utils.test.ts

@@ -214,6 +214,7 @@ describe('Model Capabilities', () => {
     it.concurrent('should return false for models that do not support temperature', () => {
       const unsupportedModels = [
         'unsupported-model',
+        'claude-sonnet-5',
         'cerebras/llama-3.3-70b',
         'o1',
         'o3',