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feat(genai): Update google-genai SDK for improvements #1244

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3c5d103
update genai sdk for gemini
Prajna1999 Oct 9, 2026
4623351
restore fallback language mapper table
Prajna1999 Oct 12, 2026
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33 changes: 18 additions & 15 deletions backend/app/models/llm/constants.py
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Original file line number Diff line number Diff line change
Expand Up @@ -176,7 +176,7 @@ def normalize_bcp47_language(value: str) -> str:


DEFAULT_STT_MODEL = "gemini-2.5-pro"
DEFAULT_TTS_MODEL = "gemini-3.1-flash-tts-preview"
DEFAULT_TTS_MODEL = "gemini-3.8-flash-tts"
DEFAULT_TTS_VOICE = "Kore"
DEFAULT_RAG_MODEL = "gpt-4o"

Expand All @@ -199,21 +199,24 @@ def normalize_bcp47_language(value: str) -> str:
DEFAULT_ELEVENLABS_STT_MODEL = "scribe_v2"
DEFAULT_ELEVENLABS_TTS_MODEL = "eleven_v3"

# BCP-47 to language tag -> Gemini ISO 639-1 code (Indic + English)
# Kaapi BCP-47 tag -> Gemini TTS language. Full locales, not bare ISO codes:
# en-IN keeps the Indian accent where "en" does not. Unlisted tags fall back
# to auto-detect.
BCP47_LOCALE_TO_GEMINI_LANG: dict[str, str] = {
"en-IN": "en",
"hi-IN": "hi",
"bn-IN": "bn",
"ta-IN": "ta",
"te-IN": "te",
"mr-IN": "mr",
"gu-IN": "gu",
"kn-IN": "kn",
"ml-IN": "ml",
"pa-IN": "pa",
"od-IN": "or",
# "as-IN": "as", //not supported by Gemini
"sd-IN": "sd",
"en-IN": "en-IN",
"hi-IN": "hi-IN",
"bn-IN": "bn-IN",
"ta-IN": "ta-IN",
"te-IN": "te-IN",
"mr-IN": "mr-IN",
"gu-IN": "gu-IN",
"kn-IN": "kn-IN",
"ml-IN": "ml-IN",
"pa-IN": "pa-IN",
# Kaapi uses the non-standard "od-IN" for Odia; the real tag is "or-IN".
"od-IN": "or-IN",
# "as-IN": not supported by Gemini
"sd-IN": "sd-IN",
}

# BCP-47 language tag → ElevenLabs ISO 639-1 code (Indic + English)
Expand Down
2 changes: 1 addition & 1 deletion backend/app/models/llm/request.py
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Original file line number Diff line number Diff line change
Expand Up @@ -89,7 +89,7 @@ class TextLLMParams(ParamSerialization, SQLModel):
"(e.g. {'type': 'enabled', 'budget_tokens': 4096})"
),
)
thinking_level: Literal["low", "medium", "high"] | None = Field(
thinking_level: Literal["minimal", "low", "medium", "high"] | None = Field(
default=None,
description="Google thinking level for thinking-capable Gemini models",
)
Expand Down
23 changes: 6 additions & 17 deletions backend/app/services/llm/mappers.py
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Expand Up @@ -267,8 +267,9 @@ def map_kaapi_to_google_params(
Supported Mapping:
- model → model
- instructions → instructions (for STT prompts, if available)
- temperature -> temperature parameter (0-2)
- top_p / max_output_tokens → same name (text only)
- temperature / top_p → not sent (deprecated by Gemini)
- max_output_tokens → same name (text only)
- language → full Gemini locale via BCP47_LOCALE_TO_GEMINI_LANG; unsupported → auto-detect (TTS only)
- thinking_level → thinking_config.thinking_level (text only)
- output_schema → output_schema, converted to Gemini's shape (text only)
- knowledge_base_ids → FileSearch tool store names (text only)
Expand Down Expand Up @@ -296,19 +297,11 @@ def map_kaapi_to_google_params(
google_params["model"] = model

if completion_type == CompletionType.TEXT:
# Text completion - instructions, temperature, reasoning, knowledge_base_ids
# Text completion - instructions, reasoning, knowledge_base_ids
instructions = params.get("instructions")
if instructions:
google_params["instructions"] = instructions

temperature = params.get("temperature")
if temperature is not None:
google_params["temperature"] = temperature

top_p = params.get("top_p")
if top_p is not None:
google_params["top_p"] = top_p

max_output_tokens = params.get("max_output_tokens")
if max_output_tokens is not None:
google_params["max_output_tokens"] = max_output_tokens
Expand Down Expand Up @@ -353,7 +346,7 @@ def map_kaapi_to_google_params(
# Language: Only set if explicitly provided (None/missing = auto-detect)
language = params.get("language")
if language:
google_lang = BCP47_LOCALE_TO_GEMINI_LANG.get(language) or None
google_lang = BCP47_LOCALE_TO_GEMINI_LANG.get(language)
if not google_lang:
warnings.append(
f"Unsupported language '{language}' for Gemini TTS, using auto-detect"
Expand All @@ -362,7 +355,7 @@ def map_kaapi_to_google_params(
google_params["language"] = google_lang

elif completion_type == CompletionType.STT:
# STT mode - instructions, temperature, input_language, output_language, response_format
# STT mode - instructions, input_language, output_language, response_format
# Apply smart default for input_language
input_language = params.get("input_language") or "auto"
google_params["input_language"] = input_language
Expand All @@ -372,10 +365,6 @@ def map_kaapi_to_google_params(
if instructions:
google_params["instructions"] = instructions

temperature = params.get("temperature")
if temperature is not None:
google_params["temperature"] = temperature

output_language = params.get("output_language")
if output_language:
google_params["output_language"] = output_language
Expand Down
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