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Add current-generation Gemini models to AIModel and deprecate the 2.x members#366

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Merged
KrisBraun merged 1 commit into from
Aug 3, 2026
Merged

Add current-generation Gemini models to AIModel and deprecate the 2.x members #366

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16 changes: 16 additions & 0 deletions .changeset/gemini-3-model-refresh.md
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@@ -0,0 +1,16 @@
---
"@plotday/twister": minor
---

Added: `AIModel.GEMINI_31_PRO`, `AIModel.GEMINI_35_FLASH`, and
`AIModel.GEMINI_35_FLASH_LITE` for the current generation of Gemini models.

Deprecated: the `GEMINI_25_*` and `GEMINI_20_*` members. Google has withdrawn
most of that generation, so a `hint` naming one of them previously failed the
whole `ai.prompt()` call. The members still exist and still compile, and a hint
naming a withdrawn model is now served by its current equivalent instead of
erroring — but new code should name a 3.x member.

The speed/cost tiers that `ai.prompt()` resolves without a hint have also moved
onto current models, so `{ speed: "capable", cost: "high" }` and the other tiers
that previously mapped to withdrawn Gemini models work again.
21 changes: 18 additions & 3 deletions twister/src/tools/ai.ts
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Expand Up@@ -188,13 +188,13 @@ export type AICapabilities = {
* prompt: "Summarize this in one sentence: ..."
* });
*
* // Balanced performance - uses GPT-5 Mini or Gemini 2.5 Flash
* // Balanced performance - uses GPT-5 Mini or Gemini 3.5 Flash
* const response = await ai.prompt({
* model: { speed: "balanced", cost: "medium" },
* prompt: "Analyze this data..."
* });
*
* // Most capable - uses models like GPT-5, Claude Sonnet 4.6, or Gemini 2.5 Pro
* // Most capable - uses models like GPT-5, Claude Sonnet 4.6, or Gemini 3.1 Pro
* const response = await ai.prompt({
* model: { speed: "capable", cost: "high" },
* prompt: "Solve this complex reasoning problem..."
Expand DownExpand Up@@ -256,11 +256,26 @@ export enum AIModel {
CLAUDE_SONNET_46 = "anthropic/claude-sonnet-4-6",
CLAUDE_HAIKU_45 = "anthropic/claude-haiku-4-5",

// Google models - Gemini 2.x series
// Google models - Gemini 3.x series
GEMINI_31_PRO = "google/gemini-3.1-pro-preview",
GEMINI_35_FLASH = "google/gemini-3.5-flash",
GEMINI_35_FLASH_LITE = "google/gemini-3.5-flash-lite",

// Google models - Gemini 2.x series (superseded)
//
// Google has withdrawn most of this generation. The members are kept so that
// twists built against an earlier SDK version still compile, and a hint
// naming a withdrawn model is transparently served by its 3.x equivalent
// rather than failing — but new code should name a 3.x member directly.
/** @deprecated Withdrawn by Google. Use {@link AIModel.GEMINI_31_PRO}. */
GEMINI_25_PRO = "google/gemini-2.5-pro",
/** @deprecated Superseded. Use {@link AIModel.GEMINI_35_FLASH}. */
GEMINI_25_FLASH = "google/gemini-2.5-flash",
/** @deprecated Withdrawn by Google. Use {@link AIModel.GEMINI_35_FLASH_LITE}. */
GEMINI_25_FLASH_LITE = "google/gemini-2.5-flash-lite",
/** @deprecated Withdrawn by Google. Use {@link AIModel.GEMINI_35_FLASH}. */
GEMINI_20_FLASH = "google/gemini-2.0-flash",
/** @deprecated Withdrawn by Google. Use {@link AIModel.GEMINI_35_FLASH_LITE}. */
GEMINI_20_FLASH_LITE = "google/gemini-2.0-flash-lite",

// Cloudflare Workers AI models - Free/low-cost models running on Cloudflare's network
Expand Down
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