Related GitHub Issue

Closes: #12132

Description

This PR attempts to address Issue #12132 by adding Claude Opus 4.7 model support across multiple providers. Feedback and guidance are welcome.

Changes:

1. packages/types/src/providers/bedrock.ts - Added anthropic.claude-opus-4-7 model entry with pricing matching Opus 4.6 (same tier). Added to BEDROCK_1M_CONTEXT_MODEL_IDS and BEDROCK_GLOBAL_INFERENCE_MODEL_IDS arrays.

2. packages/types/src/providers/anthropic.ts - Added claude-opus-4-7 model entry with 128K max tokens, 200K default context (extendable to 1M), reasoning budget support, image support, and tiered pricing for 1M context.

3. packages/types/src/providers/vertex.ts - Added claude-opus-4-7 model entry and added to VERTEX_1M_CONTEXT_MODEL_IDS array.

4. src/api/providers/anthropic.ts - Added claude-opus-4-7 to all switch cases for prompt caching, 1M context beta flag support, and getModel() tier pricing logic.

5. src/api/providers/fetchers/openrouter.ts - Added OpenRouter model ID mapping for anthropic/claude-opus-4.7.

Key details:

• Model ID: anthropic.claude-opus-4-7 (Bedrock), claude-opus-4-7 (Anthropic/Vertex)
• Context window: 200K default, extendable to 1M with beta flag
• Pricing: Same as Opus 4.6 ($5/$25 per million input/output tokens)
• Supports: images, prompt caching, reasoning budget, extended thinking

Test Procedure

• All existing bedrock tests pass (57/57)
• All anthropic + bedrock-reasoning tests pass (38/38)
• Full lint and type-check pass across all packages

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

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