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edemaine · 2026-06-18T08:08:08Z

🎯 Changes

Fix OpenRouter image generation usage reporting so provider-reported request cost is surfaced on result.usage, matching the existing OpenRouter text adapter behavior.

OpenRouter image generation already normalized token usage via buildOpenRouterUsage(...), but did not merge in extractUsageCost(...). This meant cost and cost_details were dropped for image generation responses even when OpenRouter returned them.

Adds a regression test covering image usage with provider-reported cost and snake_case cost_details.

I also tested in my test project via pnpm link. Costs are now surfaced.

✅ Checklist

I have followed the steps in the Contributing guide.
I have tested this code locally with pnpm run test:pr.

🚀 Release Impact

This change affects published code, and I have generated a changeset.
This change is docs/CI/dev-only (no release).

Summary by CodeRabbit

New Features
- OpenRouter image generation now surfaces provider-reported cost data in usage metrics, consistent with text generation behavior.
Tests
- Added test coverage to verify image generation usage includes provider-reported cost details.

coderabbitai · 2026-06-18T08:08:23Z

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: f6983544-704f-4c08-bdbb-6af653bf31ae

📥 Commits

Reviewing files that changed from the base of the PR and between cf3122d and 278c69b.

📒 Files selected for processing (1)

packages/ai-openrouter/src/adapters/image.ts

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

packages/ai-openrouter/src/adapters/image.ts

📝 Walkthrough

Walkthrough

The OpenRouter image adapter's transformResponse now imports extractUsageCost and merges its output into the returned usage object alongside buildOpenRouterUsage, surfacing provider-reported cost and cost_details. A new test verifies the mapped costDetails fields, and a changeset documents the patch.

Changes

OpenRouter image adapter cost extraction

Layer / File(s)	Summary
Cost extraction in `transformResponse` + test coverage `packages/ai-openrouter/src/adapters/image.ts`, `packages/ai-openrouter/tests/image-adapter.test.ts`, `.changeset/openrouter-image-cost.md`	`extractUsageCost` is imported and merged into the usage object returned by `transformResponse`; a new test case mocks `cost` and `cost_details` fields and asserts they map to `costDetails.upstreamCost`, `upstreamInputCost`, and `upstreamOutputCost`; changeset entry documents the patch release.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related PRs

TanStack/ai#654: Introduced the shared extractUsageCost helper that this PR now applies to the image adapter's transformResponse.
TanStack/ai#747: Added OTel middleware that reads usage.costDetails from run results; the image adapter now populates those fields, making them available to that middleware.

Suggested reviewers

tombeckenham

Poem

🐰 A patch so small, a cost so clear,
The image adapter joins the gear.
extractUsageCost now merges in,
Where only token counts had been.
Upstream costs surface, hooray!
✨ The rabbit hops another way. ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: adding cost reporting functionality for OpenRouter image models, which is the primary objective of the PR.
Description check	✅ Passed	The description comprehensively covers all required sections from the template with clear explanations of changes, motivations, testing, and checklist completion.
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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coderabbitai

🧹 Nitpick comments (1)

packages/ai-openrouter/tests/image-adapter.test.ts (1)
114-152: ⚡ Quick win

Move this new unit test to a colocated *.test.ts file.

Line 114 adds new unit coverage in packages/ai-openrouter/tests/image-adapter.test.ts, but repo guidance requires unit tests to live alongside source. Please move this case next to packages/ai-openrouter/src/adapters/image.ts (for example, packages/ai-openrouter/src/adapters/image.test.ts).

As per coding guidelines, "Place unit tests alongside source code in *.test.ts files".
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@packages/ai-openrouter/tests/image-adapter.test.ts` around lines 114 - 152,
The test case `surfaces provider-reported cost from OpenRouter image usage` is
currently located in the tests directory structure but should be colocated with
its source file per repository guidelines. Move this entire test case from the
tests directory to a new test file that lives alongside the image adapter source
code. The test should be placed in the same directory as the image adapter being
tested to follow the pattern of keeping unit tests adjacent to their source
implementations in dot-test files.
Source: Coding guidelines

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@packages/ai-openrouter/tests/image-adapter.test.ts`:
- Around line 114-152: The test case `surfaces provider-reported cost from
OpenRouter image usage` is currently located in the tests directory structure
but should be colocated with its source file per repository guidelines. Move
this entire test case from the tests directory to a new test file that lives
alongside the image adapter source code. The test should be placed in the same
directory as the image adapter being tested to follow the pattern of keeping
unit tests adjacent to their source implementations in dot-test files.

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: b901dcb3-cf85-40f6-93b8-52a4bd2f8fd2

📥 Commits

Reviewing files that changed from the base of the PR and between 8fa6cc5 and cf3122d.

📒 Files selected for processing (3)

.changeset/openrouter-image-cost.md
packages/ai-openrouter/src/adapters/image.ts
packages/ai-openrouter/tests/image-adapter.test.ts

nx-cloud · 2026-06-19T12:32:09Z

View your CI Pipeline Execution ↗ for commit cf3122d

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`nx run-many --targets=build --exclude=examples/...`	✅ Succeeded	6s	View ↗

☁️ Nx Cloud last updated this comment at 2026-06-19 12:41:24 UTC

pkg-pr-new · 2026-06-19T12:41:55Z

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commit: 278c69b

feat: cost for OpenRouter image models

cf3122d

coderabbitai Bot reviewed Jun 18, 2026

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AlemTuzlak approved these changes Jun 19, 2026

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ci: apply automated fixes

278c69b

AlemTuzlak merged commit 1047e40 into TanStack:main Jun 19, 2026
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github-actions Bot mentioned this pull request Jun 19, 2026

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feat: cost for OpenRouter image models#782

feat: cost for OpenRouter image models#782
AlemTuzlak merged 2 commits into
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edemaine:image-cost

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