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Base44 backend functions: Backend functions (Vite SPA)

The Core-integration routing rule is an exception: use a backend function for Core methods except UploadPublicFile, UploadPrivateFile and CreateFileSignedUrl (UploadFile is the retired spelling of UploadPublicFile). Model values for base44.integrations.Core.InvokeLLM in the generated app: The SDK reference includes compatibility aliases. Use this catalog for current model IDs and capability constraints. Omit model (or use “automatic”) unless the app needs an explicit model. Automatic selection supports text, uploaded files, and web search.

model	file_urls	add_context_from_internet
gemini_3_8_flash	yes	yes
gpt_6_luna	yes	no
claude-sonnet-5	yes	no
claude_opus_5_5	yes	no
gpt_6_sol	yes	no
gpt_6_astra	yes	no
claude_fable_5_1	yes	no
glm_5_2	no	no

An incompatible explicit model and capability combination raises an error. Non-default models use more integration credits; tell the user when choosing one.

​Base44 backend functions: Backend functions (Vite SPA)

Base44 backend functions: Backend functions (Vite SPA)