A GEMINI_BASE_URL (or tts.gemini.base_url / providers.gemini base_url) set
to a host root — https://generativelanguage.googleapis.com or a proxy root
like http://localhost:4000/gemini — produced native requests to
{base}/models/{model}:generateContent with no API version segment, a
guaranteed 404. Google's own google-genai client treats the base URL as a
host root and appends the version itself, so users reasonably configure it
that way.
normalize_gemini_base_url() appends /v1beta unless the URL already ends
with a version segment (v1, v1beta, v1alpha, ...). Applied at every native
request builder: GeminiNativeClient, probe_gemini_tier, Gemini TTS
(tts_tool.py), and streaming TTS (tts_streaming.py). /openai-suffixed
URLs are untouched (OpenAI-compat path).
Port of cline/cline#13329, which fixed the same bug class after their
ai-sdk migration.
Teknium
f030c03970