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Greptile Summary

This PR fixes a copy-paste bug in src/shared/api.ts where gemini-3-flash-preview had cacheWritesPrice: 0.05 instead of cacheReadsPrice: 0.05 in both vertexModels and geminiModels, causing cache reads to silently cost $0. It also removes a stale tiers block from the geminiModels entry whose two tiers had identical pricing ($0.30/$2.50) that didn't match the official rates ($0.50/$3.00) confirmed in Google's pricing documentation.

Confidence Score: 5/5

Safe to merge — this is a correct data-only bug fix with no logic changes.

The pricing values are confirmed against official Google AI pricing documentation ($0.50 input, $3.00 output, $0.05 cached reads). Setting cacheWritesPrice to 0 follows the established pattern for Gemini models in this codebase (writes billed at standard input rate). The removed tiers had identical values for both context-window tiers and incorrect prices, so their removal is correct. No logic or behavioral code was changed.

No files require special attention.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[gemini-3-flash-preview token used from cache] --> B{cacheReadsPrice defined?}
    B -- "Before PR: No (missing field)" --> C["cacheReadsPrice = 0 (free)"]
    B -- "After PR: Yes = 0.05" --> D["cacheReadsPrice = $0.05 / 1M tokens"]
    C --> E["User undercharged — bug"]
    D --> F["Correct billing"]
    A2[gemini-3-flash-preview cache written] --> G{cacheWritesPrice}
    G -- "Before PR: 0.05 (wrong field)" --> H["Pricing logic misled"]
    G -- "After PR: 0 (correct)" --> I["Writes billed at standard inputPrice"]

_{Reviews (1): Last reviewed commit: "correct gemini flash 3 preview price" | Re-trigger Greptile}