[lidge-jun]

Summary

Cursor Claude Fast usage estimates now follow Cursor's published Fast rates for Opus 4.8, Opus 5 and Opus 5.5.

• Explicit supported -fast IDs receive Fast tuples with direct Cursor provenance and verified status.
• Base-model Cursor Fast selections use the persisted cursor-variant tier outcome and a provider-scoped 2x rule.
• Unsupported Fast effort spellings fail closed, Opus 4.7 remains excluded, and configured user prices retain precedence.
• The usage contract and regression plan are recorded in devlog/_plan/260924_cursor_fast_pricing/.

Sources:

• https://cursor.com/docs/models/claude-opus-4-8
• https://cursor.com/docs/models/claude-opus-5
• https://cursor.com/docs/models/claude-opus-5-5
• https://platform.claude.com/docs/en/build-with-claude/fast-mode

Verification

• bun test tests/usage/usage-cost.test.ts tests/usage/usage-cursor-fast-pricing.test.ts tests/test-layout.test.ts tests/test-layout-tooling.test.ts — 123 pass, 0 fail.
• bun run typecheck — passed.
• bun run structure:check — passed.
• bun run privacy:scan — passed.
• git diff --check — passed.
• gpt-6-sol review findings were folded: direct Cursor Fast provenance is asserted, and unsupported Fast ladders are rejected.

Checklist

• Scope stays focused and avoids unrelated cleanup.
• Docs or release notes were updated when needed.
• Security-sensitive changes were reviewed for secrets, auth, and unsafe defaults.

Summary by CodeRabbit

• New Features
  • Cursor Fast pricing is now reflected for supported Claude Opus 4.8, 5, and 5.5 models. Explicit Fast model IDs and recognized Fast tier outcomes apply the published 2× rates.
• Bug Fixes
  • Standard model rates remain unchanged, and configured prices continue to take precedence over catalog pricing. Unsupported Fast variants do not receive a Fast price.
• Documentation
  • Added pricing guidance, including that Opus 4.7 Fast is unavailable and remains standard-priced.

[github-actions]

✅ Deterministic PR hygiene checks passed.

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-24T04:01:15.253963Z	d3dc40d	PR opened

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📥 Commits

Reviewing files that changed from the base of the PR and between 764dc13 and d3dc40d.

📒 Files selected for processing (10)

• devlog/_plan/260924_cursor_fast_pricing/000_plan.md
• devlog/_plan/260924_cursor_fast_pricing/010_implementation.md
• devlog/_plan/260924_cursor_fast_pricing/020_verification.md
• scripts/test-layout/layout.json
• src/usage/cost.ts
• src/usage/expected-prices.ts
• structure/dashboard-and-usage.md
• tests/fixtures/test-layout-expected.json
• tests/usage/usage-cost.test.ts
• tests/usage/usage-cursor-fast-pricing.test.ts

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: d3dc40d558

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[chatgpt-codex-connector]

Document Cursor Fast pricing in the public guide

This changes user-visible cost estimates for Cursor Claude Fast requests, but only the internal structure document was updated. The existing Cursor Fast section in docs-site/src/content/docs/reference/configuration/providers.md explains variant routing without mentioning the new 2× rates, explicit-ID handling, or user-price precedence, so operators cannot determine how displayed costs are calculated; update that public section alongside this contract.

AGENTS.md reference: src/AGENTS.md:L29-L29

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