🤖 feat: Claude Opus 4.5 Token Rates and Window Limits (#10653)

* 🤖 feat: Claude Opus 4.5 Token Rates and Window Limits

- Introduced new model 'claude-opus-4-5' with defined prompt and completion values in tokenValues and cacheTokenValues.
- Updated tests to validate prompt, completion, and cache rates for the new model.
- Enhanced model name handling to accommodate variations for 'claude-opus-4-5' across different contexts.
- Adjusted schemas to ensure correct max output token limits for the new model.

* ci: Add tests for "prompt-caching" beta header in Claude Opus 4.5 models

- Implemented tests to verify the addition of the "prompt-caching" beta header for the 'claude-opus-4-5' model and its variations.
- Updated future-proofing logic to ensure correct max token limits for Claude 4.x and 5.x Opus models, adjusting defaults to 64K where applicable.
- Enhanced existing tests to reflect changes in expected max token values for future Claude models.

* chore: Remove redundant max output check for Anthropic settings

- Eliminated the unnecessary check for ANTHROPIC_MAX_OUTPUT in the anthropicSettings schema, streamlining the logic for handling max output values.

packages/api/src/utils/tokens.ts

@@ -133,8 +133,9 @@ const anthropicModels = {
   'claude-3.5-sonnet-latest': 200000,
   'claude-haiku-4-5': 200000,
   'claude-sonnet-4': 1000000,
-  'claude-opus-4': 200000,
   'claude-4': 200000,
+  'claude-opus-4': 200000,
+  'claude-opus-4-5': 200000,
 };
 
 const deepseekModels = {
@@ -334,8 +335,9 @@ const anthropicMaxOutputs = {
   'claude-3-sonnet': 4096,
   'claude-3-opus': 4096,
   'claude-haiku-4-5': 64000,
-  'claude-opus-4': 32000,
   'claude-sonnet-4': 64000,
+  'claude-opus-4': 32000,
+  'claude-opus-4-5': 64000,
   'claude-3.5-sonnet': 8192,
   'claude-3-5-sonnet': 8192,
   'claude-3.7-sonnet': 128000,