[eshurakov]

Summary

• Upstream removed free tier for inclusionai/ling-3.0-flash:free (OpenRouter 404 “unavailable for free”; Novita/Vercel “model not found”), which zeroed successful traffic and kept BetterStack /api/models/up unhealthy.
• Remove the model from autoFreeModels so kilo-auto/free and preferred/monitor lists no longer include it.
• Add it to unavailableModelIds so direct requests get a clean unavailable-model error.
• Update unit test expectations.

Test plan

• CI: models.test.ts, unavailable-models.test.ts, variants.test.ts
• After deploy: curl -s 'https://api.kilo.ai/api/models/up?key=kilo-models-health-check' | jq '.healthy, .models["inclusionai/ling-3.0-flash:free"]' — overall healthy; free Ling absent or not monitored
• Confirm BetterStack models/up monitor recovers
• Spot-check kilo-auto/free still resolves to remaining candidates (stepfun / laguna)

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (4 files)

• apps/web/src/lib/ai-gateway/models.ts
• apps/web/src/lib/ai-gateway/models.test.ts
• apps/web/src/lib/ai-gateway/providers/variants.test.ts
• apps/web/src/lib/ai-gateway/unavailable-models.ts

Reviewed the retirement of inclusionai/ling-3.0-flash:free with high confidence. The removal from autoFreeModels propagates correctly to all dynamic consumers (preferredModels, getMonitoredModels for /api/models/up, Slack-bot allow list, models router, model combobox), and the addition to unavailableModelIds follows the scoped AGENTS.md convention so stale clients receive the generic unavailable-model error. Test expectation updates are consistent with the source changes; no remaining hardcoded references to the model exist outside unchanged, harmless fallback entries (Vercel ID mapping, ling- variant rule).

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_{Reviewed by kimi-k3 · Input: 59.7K · Output: 9.2K · Cached: 515.4K}

_{Review guidance: REVIEW.md from base branch main}