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feat(providers): price Gemini 4 Argon on Copilot - #623
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Gemini 4 Argon reached Copilot GA on 2026-10-13 under the stable `gemini-4-argon` id, and Google's own pricing page publishes the same id. GitHub's changelog bills it at provider list pricing, and the billing reference quotes one Default tier at $2.00 input / $0.10 cached input / $10.00 output — the same promotional card Google runs through 2026-11-30 before doubling on 2026-12-01. models.dev agrees on all three rates. Two properties separate it from the Gemini 3.x rows: Google lists a single band for the 1M-token window instead of repricing above 200k, and its only caching is implicit, so no cache-write rate exists to quote. Google sells Batch/Flex/Priority lanes too, but Copilot's billing surface names no tier for this model, so the entry stays Base-only. Pricing was researched from public sources only; no probe was run, as no account with Argon access was available. Bump the persisted model catalog revision because the static pricing serializes into cached ProviderModel rows. References: https://github.blog/changelog/2026-10-13-gemini-4-argon-in-github-copilot/ https://docs.github.com/en/copilot/reference/copilot-billing/models-and-pricing https://ai.google.dev/gemini-api/docs/pricing#gemini-4-argon
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Gemini 4 Argon reached Copilot GA on 2026-10-13, but the Copilot pricing table had no row for
gemini-4-argon, so requests against it priced as unknown.The rates come from public sources only; no probe was run, since no account with Argon access was available.
serviceTiercoordinate.MODEL_CATALOG_REVISIONis bumped because static pricing serializes into cachedProviderModelrows.Validation: full
pnpm -r run typecheck,tsconfig.scripts.jsontypecheck, repository-wide ESLint, and the whole vitest run (7594 passed, 5 skipped) plus the Codex installer integration suite with the CI-provided binary present.References:
https://github.blog/changelog/2026-10-13-gemini-4-argon-in-github-copilot/
https://docs.github.com/en/copilot/reference/copilot-billing/models-and-pricing
https://ai.google.dev/gemini-api/docs/pricing#gemini-4-argon