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| 1 | +/** |
| 2 | + * Centralized model metadata. Update model versions here and everywhere else will follow. |
| 3 | + */ |
| 4 | + |
| 5 | +type ModelProvider = "anthropic" | "openai"; |
| 6 | + |
| 7 | +interface KnownModelDefinition { |
| 8 | + /** Provider identifier used by SDK factories */ |
| 9 | + provider: ModelProvider; |
| 10 | + /** Provider-specific model name (no provider prefix) */ |
| 11 | + providerModelId: string; |
| 12 | + /** Aliases that should resolve to this model */ |
| 13 | + aliases?: string[]; |
| 14 | + /** Preload tokenizer encodings at startup */ |
| 15 | + warm?: boolean; |
| 16 | + /** Use as global default model */ |
| 17 | + isDefault?: boolean; |
| 18 | + /** Optional tokenizer override for ai-tokenizer */ |
| 19 | + tokenizerOverride?: string; |
| 20 | +} |
| 21 | + |
| 22 | +interface KnownModel extends KnownModelDefinition { |
| 23 | + /** Full model id string in the format provider:model */ |
| 24 | + id: `${ModelProvider}:${string}`; |
| 25 | +} |
| 26 | + |
| 27 | +// Model definitions. Note we avoid listing legacy models here. These represent the focal models |
| 28 | +// of the community. |
| 29 | +const MODEL_DEFINITIONS = { |
| 30 | + SONNET: { |
| 31 | + provider: "anthropic", |
| 32 | + providerModelId: "claude-sonnet-4-5", |
| 33 | + aliases: ["sonnet"], |
| 34 | + warm: true, |
| 35 | + isDefault: true, |
| 36 | + tokenizerOverride: "anthropic/claude-sonnet-4.5", |
| 37 | + }, |
| 38 | + HAIKU: { |
| 39 | + provider: "anthropic", |
| 40 | + providerModelId: "claude-haiku-4-5", |
| 41 | + aliases: ["haiku"], |
| 42 | + tokenizerOverride: "anthropic/claude-3.5-haiku", |
| 43 | + }, |
| 44 | + OPUS: { |
| 45 | + provider: "anthropic", |
| 46 | + providerModelId: "claude-opus-4-1", |
| 47 | + aliases: ["opus"], |
| 48 | + }, |
| 49 | + GPT: { |
| 50 | + provider: "openai", |
| 51 | + providerModelId: "gpt-5.1", |
| 52 | + aliases: ["gpt-5.1"], |
| 53 | + warm: true, |
| 54 | + }, |
| 55 | + GPT_PRO: { |
| 56 | + provider: "openai", |
| 57 | + providerModelId: "gpt-5-pro", |
| 58 | + aliases: ["gpt-5-pro"], |
| 59 | + }, |
| 60 | + GPT_CODEX: { |
| 61 | + provider: "openai", |
| 62 | + providerModelId: "gpt-5.1-codex", |
| 63 | + aliases: ["codex"], |
| 64 | + warm: true, |
| 65 | + }, |
| 66 | + GPT_MINI: { |
| 67 | + provider: "openai", |
| 68 | + providerModelId: "gpt-5.1-codex-mini", |
| 69 | + }, |
| 70 | +} as const satisfies Record<string, KnownModelDefinition>; |
| 71 | + |
| 72 | +export type KnownModelKey = keyof typeof MODEL_DEFINITIONS; |
| 73 | + |
| 74 | +export const KNOWN_MODELS = Object.fromEntries( |
| 75 | + Object.entries(MODEL_DEFINITIONS).map(([key, definition]) => [ |
| 76 | + key, |
| 77 | + { |
| 78 | + ...definition, |
| 79 | + id: `${definition.provider}:${definition.providerModelId}` as `${ModelProvider}:${string}`, |
| 80 | + }, |
| 81 | + ]) |
| 82 | +) as Record<KnownModelKey, KnownModel>; |
| 83 | + |
| 84 | +export function getKnownModel(key: KnownModelKey): KnownModel { |
| 85 | + return KNOWN_MODELS[key]; |
| 86 | +} |
| 87 | + |
| 88 | +// ------------------------------------------------------------------------------------ |
| 89 | +// Derived collections |
| 90 | +// ------------------------------------------------------------------------------------ |
| 91 | + |
| 92 | +const DEFAULT_MODEL_ENTRY = |
| 93 | + Object.values(KNOWN_MODELS).find((model) => model.isDefault) ?? KNOWN_MODELS.SONNET; |
| 94 | + |
| 95 | +export const DEFAULT_MODEL = DEFAULT_MODEL_ENTRY.id; |
| 96 | + |
| 97 | +export const DEFAULT_WARM_MODELS = Object.values(KNOWN_MODELS) |
| 98 | + .filter((model) => model.warm) |
| 99 | + .map((model) => model.id); |
| 100 | + |
| 101 | +export const MODEL_ABBREVIATIONS: Record<string, string> = Object.fromEntries( |
| 102 | + Object.values(KNOWN_MODELS) |
| 103 | + .flatMap((model) => (model.aliases ?? []).map((alias) => [alias, model.id] as const)) |
| 104 | + .sort(([a], [b]) => a.localeCompare(b)) |
| 105 | +); |
| 106 | + |
| 107 | +export const TOKENIZER_MODEL_OVERRIDES: Record<string, string> = Object.fromEntries( |
| 108 | + Object.values(KNOWN_MODELS) |
| 109 | + .filter((model) => Boolean(model.tokenizerOverride)) |
| 110 | + .map((model) => [model.id, model.tokenizerOverride!]) |
| 111 | +); |
| 112 | + |
| 113 | +export const MODEL_NAMES: Record<ModelProvider, Record<string, string>> = Object.entries( |
| 114 | + KNOWN_MODELS |
| 115 | +).reduce<Record<ModelProvider, Record<string, string>>>( |
| 116 | + (acc, [key, model]) => { |
| 117 | + if (!acc[model.provider]) { |
| 118 | + const emptyRecord: Record<string, string> = {}; |
| 119 | + acc[model.provider] = emptyRecord; |
| 120 | + } |
| 121 | + acc[model.provider][key] = model.providerModelId; |
| 122 | + return acc; |
| 123 | + }, |
| 124 | + {} as Record<ModelProvider, Record<string, string>> |
| 125 | +); |
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