fix(opencode): resolve provider model pricing aliases

[ryoppippi]

Replaces one-off OpenCode model aliases with provider-aware pricing resolution.

OpenCode records providerID and modelID from its models.dev-backed model metadata. This preserves providerID in loaded entries, normalizes Claude minor-version IDs such as claude-opus-4.7 and claude-opus-41 algorithmically, and tries pricing candidates in an order that avoids zero-cost provider metadata when a canonical LiteLLM model price exists.

This supersedes #868.

Testing:

• pnpm --filter @ccusage/opencode test
• pnpm --filter @ccusage/opencode typecheck
• pnpm run format
• pnpm typecheck
• pnpm run test

Summary by CodeRabbit

• Bug Fixes

  • Improved cost calculation to try multiple normalized model name variants and provider-prefixed candidates, returning accurate nonzero pricing when available.

• Data

  • Usage entries now include a provider identifier (defaults to "unknown" when missing).

• Tests

  • Added tests covering model name normalization patterns, provider handling, and candidate selection ordering.

[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: 62ea1d5d-063e-442f-b372-7b63fdc83165

📥 Commits

Reviewing files that changed from the base of the PR and between 03c15eb and ba407ff.

📒 Files selected for processing (2)

• apps/opencode/src/cost-utils.ts
• apps/opencode/src/data-loader.ts

🚧 Files skipped from review as they are similar to previous changes (2)

• apps/opencode/src/data-loader.ts
• apps/opencode/src/cost-utils.ts

---

📝 Walkthrough

Walkthrough

The pull request adds a required providerID to OpenCode usage entries and uses it in cost calculation: cost-utils builds a deduplicated, normalized list of model/provider candidate names (including Claude naming variants and provider-prefixed forms) and iterates candidates to return the first positive LiteLLM pricing result; tests cover normalization and ordering.

Changes

Provider-aware cost calculation

Layer / File(s)	Summary
Data shape apps/opencode/src/data-loader.ts	LoadedUsageEntry type now includes required providerID: string.
Message conversion apps/opencode/src/data-loader.ts	convertOpenCodeMessageToUsageEntry extracts providerID from the message or defaults to 'unknown'; tests assert providerID in full-message and missing-fields cases.
Normalization helpers apps/opencode/src/cost-utils.ts	Adds helpers to normalize provider IDs (replace - with _), normalize Claude model-name variants via regex (dot-notation, compact minor versions, generation-number form), and build a deduplicated candidate list including base/normalized names and optional providerPrefix/model variants.
Cost calculation apps/opencode/src/cost-utils.ts	calculateCostForEntry iterates the generated model/provider candidates and returns the first successful calculateCostFromTokens result with value > 0; returns 0 if none match.
Validation tests apps/opencode/src/cost-utils.ts	Guarded Vitest tests validate Claude dot-notation, compact minor-version, future-generation normalizations, and provider-prefixed candidate selection ordering.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• ryoppippi/ccusage#743: Expands Claude model-name detection to include anthropic provider prefixes, related to the normalization and provider-prefixed lookup logic here.

Poem

🐇 I hop through models, one by one,
Normalize Claude till the work is done —
Provider prefixes, dots, and small-times too,
Try each candidate until pricing comes through.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 28.57% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title directly relates to the main objective: resolving provider model pricing aliases by implementing provider-aware pricing resolution with normalization and candidate lookup ordering.
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/opencode-provider-model-pricing

---

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commit: ba407ff

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Status	Name	Latest Commit	Updated (UTC)
✅ Deployment successful! View logs	ccusage-guide	ba407ff	May 11 2026, 10:11 PM