fix(models): add 1h cache write price to Claude Fable 5

[steebchen]

Summary

The most recent commit (#2607, "feat(models): add Claude Fable 5 to Anthropic provider") introduced a unit test failure in apps/gateway/src/lib/anthropic-pricing.spec.ts.

The claude-fable-5 provider mapping sets cacheWriteInputPrice but did not define cacheWriteInputPrice1h. The pricing test enforces that every Anthropic mapping with a 5m cache-write price also defines the 1h cache-write price — otherwise 1h cache writes would silently bill at the 5m rate.

This adds the missing cacheWriteInputPrice1h: "20.0e-6", which matches the standard 2× base input price (10.0e-6) and satisfies the ratio assertions in the same test suite.

Test plan

• npx vitest run apps/gateway/src/lib/anthropic-pricing.spec.ts → 119 passed
• pnpm format and pnpm build pass

🤖 Generated with Claude Code

Summary by CodeRabbit

• Updates
  • Updated pricing information for Claude Fable 5 model to include cache write input pricing data.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 3e1ee857-4846-4154-a816-68331e3c5338

📥 Commits

Reviewing files that changed from the base of the PR and between aedbd9c and 82a3155.

📒 Files selected for processing (1)

• packages/models/src/models/anthropic.ts

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Walkthrough

This PR adds a single pricing field, cacheWriteInputPrice1h, to the claude-fable-5 model entry in the anthropic models configuration. The change updates the exported anthropicModels data constant without altering any function signatures or exported types.

Changes

Claude Fable-5 Cache Write Pricing

Layer / File(s)	Summary
Cache write input pricing for claude-fable-5 packages/models/src/models/anthropic.ts	Added cacheWriteInputPrice1h pricing field to the claude-fable-5 model provider configuration.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• theopenco/llmgateway#2607: Introduced the claude-fable-5 model entry with pricing and caching details in the same anthropic models file.
• theopenco/llmgateway#2435: Extended anthropicModels with cache-write input pricing for other model entries.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding the 1h cache write price field to Claude Fable 5 model configuration.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/claude-fable-5-cache-write-1h

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