Method ResolveModelAlias

pkg/modelsdev/store.go:404–439

ResolveModelAlias resolves a model alias to its pinned version. For example, ("anthropic", "claude-sonnet-4-5") might resolve to "claude-sonnet-4-5-20250929". If the model is not an alias (already pinned or unknown), the original model name is returned. This method uses the models.dev database to fi

(ctx context.Context, providerID, modelName string)

// If the model is not an alias (already pinned or unknown), the original model name is returned.
// This method uses the models.dev database to find the corresponding pinned version.
func (s *Store) ResolveModelAlias(ctx context.Context, providerID, modelName string) string {
	if providerID == "" || modelName == "" {
		return modelName
	}

	// If the model already has a date suffix, it's already pinned
	if datePattern.MatchString(modelName) {
		return modelName
	}

	provider, err := s.getProvider(ctx, providerID)
	if err != nil {
		return modelName
	}

	// Check if the model exists and is marked as "(latest)"
	model, exists := provider.Models[modelName]
	if !exists || !strings.Contains(model.Name, "(latest)") {
		return modelName
	}

	// Find the pinned version by matching the base display name
	// e.g., "Claude Sonnet 4 (latest)" -> "Claude Sonnet 4"
	baseDisplayName := strings.TrimSuffix(model.Name, " (latest)")

	for pinnedID, pinnedModel := range provider.Models {
		if pinnedID != modelName &&
			!strings.Contains(pinnedModel.Name, "(latest)") &&
			pinnedModel.Name == baseDisplayName &&
			datePattern.MatchString(pinnedID) {
			return pinnedID
		}
	}

	return modelName
}

// bedrockRegionPrefixes contains known regional/inference profile prefixes used in Bedrock model IDs.
// These prefixes should be stripped when looking up models in the database since models.dev