fix(ai-openrouter): exclude unsupported 'prediction' param from generated model options by tombeckenham · Pull Request #1135 · TanStack/ai

tombeckenham · 2026-08-18T07:28:36Z

🎯 Changes

Main CI went red after the OpenRouter model-metadata sync (#1048):

The OpenRouter API newly reports prediction as a supported parameter, so the generator emitted Pick<OpenRouterBaseOptions, ... | 'prediction'> for 9 models — but @openrouter/sdk@0.13.20's ChatRequest does not declare that field (its outbound schema would strip it at runtime), so packages/ai-openrouter no longer compiled (TS2344 in model-meta.ts, dts generation fails, which cascades into every example/e2e typecheck).
The same sync added grok-4.5 / grok-4.6 to GROK_CHAT_MODELS without updating the ai-grok unit test that pins the list, so test:lib was red too.

Fix:

Add prediction to the sync script's excludedParams set (same rationale as the existing entries: the SDK strips undeclared keys, so exposing it would silently no-op user input) and strip it from the generated model-meta.ts.
Update the stale GROK_CHAT_MODELS test expectation.

✅ Checklist

I have followed the steps in the Contributing guide.
I have tested this code locally with pnpm run test:pr (targeted: @tanstack/ai-openrouter build/test:lib/test:types and @tanstack/ai-grok test:lib are green; the full suite was red on main because of this very breakage).

🚀 Release Impact

This change affects published code, and I have generated a changeset.

Summary by CodeRabbit

Bug Fixes
- Corrected OpenRouter model options by removing unsupported prediction settings from affected Mistral Codestral and GPT-4o models.
- Prevented generated model configurations from exposing incompatible prediction parameters.
New Features
- Added support for recognizing Grok 4.5 and Grok 4.6 models.

…ated model options The OpenRouter model-metadata sync (#1048) started emitting 'prediction' in the generated per-model option Picks, but @openrouter/sdk's ChatRequest does not declare that field (its outbound schema would strip it at runtime), so packages/ai-openrouter no longer compiled and main CI went red. Add 'prediction' to the generator's excludedParams set (same rationale as the existing entries) and strip it from the generated model-meta. Also update the stale GROK_CHAT_MODELS test expectation that the same sync commit broke by adding grok-4.5 / grok-4.6.

coderabbitai · 2026-08-18T07:29:01Z

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 9e52fb5a-a1b7-45b1-b25c-172b40099c51

📥 Commits

Reviewing files that changed from the base of the PR and between bc8c5e8 and 50d1be0.

📒 Files selected for processing (4)

.changeset/fix-openrouter-prediction-param.md
packages/ai-grok/tests/grok-adapter.test.ts
packages/ai-openrouter/src/model-meta.ts
scripts/convert-openrouter-models.ts

💤 Files with no reviewable changes (1)

packages/ai-openrouter/src/model-meta.ts

Included review availability: Your plan includes up to 8 reviews per rolling hour; 7 remain after this review.

📝 Walkthrough

Walkthrough

The PR excludes prediction from generated OpenRouter options and affected model metadata. It also updates the Grok adapter test to include grok-4.5 and grok-4.6.

Changes

OpenRouter prediction compatibility

Layer / File(s)	Summary
OpenRouter option generation and metadata `scripts/convert-openrouter-models.ts`, `packages/ai-openrouter/src/model-meta.ts`, `.changeset/fix-openrouter-prediction-param.md`	The converter omits `prediction` from generated options. Affected OpenRouter capability metadata and option mappings no longer include `prediction`. A patch changeset documents the update.

Grok model coverage

Layer / File(s)	Summary
Supported Grok model test `packages/ai-grok/tests/grok-adapter.test.ts`	The expected supported model list now includes `grok-4.5` and `grok-4.6`.

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

Merge Risk:⚪ Minimal · up to 50d1b

The change removes an unsupported OpenRouter option from generated metadata and updates the affected model-list expectation; no actionable merge-blocking risk remains after normal checks and review.

Suggested reviewers:alemtuzlak

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% 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
Title check	✅ Passed	The title clearly and concisely describes the primary OpenRouter change: excluding the unsupported prediction parameter.
Description check	✅ Passed	The description explains the cause and fixes, completes the required checklist, and documents the published-code release impact.
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.

✨ Finishing Touches 💡 1

📝 Generate docstrings 💡

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Commit on current branch

🧪 Generate unit tests (beta)

Create PR with unit tests
Commit unit tests in branch fix/openrouter-prediction-param

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nx-cloud · 2026-08-18T07:29:57Z

View your CI Pipeline Execution ↗ for commit 50d1be0

Command	Status	Duration	Result
`nx run-many --targets=build --exclude=examples/...`	✅ Succeeded	3s	View ↗

☁️ Nx Cloud last updated this comment at 2026-08-18 07:30:03 UTC

pkg-pr-new · 2026-08-18T07:30:41Z

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commit: 50d1be0

tombeckenham requested a review from a team as a code owner August 18, 2026 07:28

tombeckenham mentioned this pull request Aug 18, 2026
feat(ai-grok): catch up Grok Imagine image, video, and voice modes #1136
Merged
3 tasks

AlemTuzlak approved these changes Aug 18, 2026
View reviewed changes

AlemTuzlak merged commit fe42d82 into mainAug 18, 2026
9 checks passed

AlemTuzlak deleted the fix/openrouter-prediction-param branch August 18, 2026 08:39

github-actionsBot mentioned this pull request Aug 18, 2026
ci: Version Packages #1118
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fix(ai-openrouter): exclude unsupported 'prediction' param from generated model options - #1135

fix(ai-openrouter): exclude unsupported 'prediction' param from generated model options#1135
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fix/openrouter-prediction-param

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