Gemini CLI: gemini-2.5-flash blank response for a specific Japanese phrase, but flash-2.5-lite works

Gemini API
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1

  • Problem: gemini-2.5-flash returns a blank response for a specific Japanese phrase.

  • Working Cases:

  • gemini -p "Hello world." --model gemini-2.5-flash (works)

  • gemini -p "Translate this from Japanese to English, breaking down the structure: きょうしつ に いす が あ ります か" (works, default model)

  • gemini -p "Translate this from Japanese to English, breaking down the structure: あります" --model gemini-2.5-flash (works)

  • gemini -p "Translate this from Japanese to English, breaking down the structure: きょうしつにいすがありますか" --model gemini-2.5-flash-lite (works)

  • Failing Case:

  • gemini -p "Translate this from Japanese to English, breaking down the structure: きょうしつにいすがありますか" --model gemini-2.5-flash (blank response)

  • Environment:

  • Debian GNU/Linux 12 (bookworm) on Chrome OS Flex

  • Node.js version v24.4.1

  • NPM version 11.5.1

  • Gemini CLI version 0.1.12

  • Troubleshooting Steps Taken: I’ve ruled out authentication, general connectivity, and tried various ways of entering the prompt (re-typing, no spaces).

  • What Gemini Pro suspects: Issues about tokenizer differences or internal model logic.

3

Hello,

Welcome to the Forum,

For Gemini-CLI related querries, I would recommend raising your issue at Gemini CLI Github for better resolution.