feat(ai-anthropic): add Claude Sonnet 5, Fable 5 and other missing models to type maps

[GucciPants]

Closes #880

Added the following models to ANTHROPIC_COMBINED_TOOLS_AND_SCHEMA_MODELS
and AnthropicChatModelToolCapabilitiesByName:

• Claude Sonnet 5
• Claude Fable 5
• Opus 4.8
• Opus 4.8 Fast
• Opus 4.7 Fast (tool capabilities only)

Added type assertion tests for Sonnet 5 and Fable 5 covering provider
options, extended thinking, priority tier, base options, and input
modality constraints.

Note: Could not run pnpm test:pr locally due to disk space constraints.

Summary by CodeRabbit

• New Features
  • Added support for additional Anthropic model variants, including Claude Sonnet 5, Claude Fable 5, and newer Opus 4.7/4.8 fast options.
  • Expanded tool and schema compatibility so these models share the same supported capabilities as other Anthropic chat models.
  • Improved model option coverage to better recognize supported settings and input types for the newly added models.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 62472ed9-4d26-48fa-bb27-3b0084be2659

📥 Commits

Reviewing files that changed from the base of the PR and between 2e01c11 and 3d702d0.

📒 Files selected for processing (1)

• .changeset/spotty-maps-walk.md

🚧 Files skipped from review as they are similar to previous changes (1)

• .changeset/spotty-maps-walk.md

---

📝 Walkthrough

Walkthrough

This PR adds new Claude model identifiers to Anthropic model metadata, updates the release notes, and extends type tests for provider options and input modality support on claude-sonnet-5 and claude-fable-5.

Changes

Anthropic Model Metadata Additions

Layer / File(s)	Summary
Model metadata updates packages/ai-anthropic/src/model-meta.ts, .changeset/spotty-maps-walk.md	Adds CLAUDE_OPUS_4_8, CLAUDE_OPUS_4_8_FAST, CLAUDE_FABLE_5, CLAUDE_SONNET_5 to ANTHROPIC_COMBINED_TOOLS_AND_SCHEMA_MODELS, adds tool-capability typings for CLAUDE_OPUS_4_7_FAST, CLAUDE_OPUS_4_8, CLAUDE_OPUS_4_8_FAST, CLAUDE_FABLE_5, CLAUDE_SONNET_5, and records the patch in the changeset.
Provider options type test coverage packages/ai-anthropic/tests/model-meta.test.ts	Extends type-assertion tests to cover claude-sonnet-5 and claude-fable-5 for provider option properties, container/context/MCP/stop-sequences/tool-choice/sampling options, and type discrimination.
Input modality type test coverage packages/ai-anthropic/tests/model-meta.test.ts	Adds modality typing assertions verifying claude-sonnet-5 and claude-fable-5 accept text/image/document parts and reject audio/video parts.

Estimated code review effort: 2 (Simple) | ~10 minutes

Suggested reviewers: AlemTuzlak

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description covers the changes, but it omits the required checklist and release impact sections from the template.	Add the checklist and release impact sections, and include the required testing and release details in the template format.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: adding missing Anthropic model support in type maps.
Linked Issues check	✅ Passed	The PR adds Sonnet 5 and Fable support in the Anthropic type maps and adds type-level coverage for those models.
Out of Scope Changes check	✅ Passed	The added models and tests stay within the Anthropic model-support area and do not introduce unrelated features.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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---

☁️ Nx Cloud last updated this comment at 2026-07-02 10:23:16 UTC

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commit: 3d702d0