Fixes#18599
When OpenAI models (gpt-5-nano, o1-*, o3-*) and other providers return
reasoning_tokens in completion_tokens_details but don't provide text_tokens,
LiteLLM was incorrectly calculating costs using only reasoning_tokens,
ignoring the remaining completion tokens.
Changes:
- Modified generic_cost_per_token() in llm_cost_calc/utils.py to calculate
text_tokens as: completion_tokens - reasoning_tokens - audio_tokens - image_tokens
when text_tokens is not explicitly provided
- Added comprehensive test case test_reasoning_tokens_without_text_tokens_gpt5_nano()
to verify all completion_tokens are billed correctly
Example:
- completion_tokens: 977
- reasoning_tokens: 768
- Before: only 768 tokens billed (21% less)
- After: all 977 tokens billed correctly
Affected models:
- OpenAI: gpt-5-nano, o1-*, o3-*
- Perplexity: sonar-reasoning*
- Any model returning reasoning_tokens without text_tokens
- Lazy load remove_index_from_tool_calls via __getattr__
- Lazy load _service_logger module via __getattr__ in __init__.py
- Lazy load audio_utils.utils with module-level caching in utils.py
- Remove direct imports that trigger heavy module loading
These changes reduce import-time memory usage by deferring imports
until they are actually needed, while maintaining performance through
caching for subsequent accesses.
- /v2/model/info now returns {"data": []} when llm_router is None or model_list is empty
- /model_group/info now returns {"data": []} when llm_model_list is None or empty
- Fixes UI crash on fresh installs with STORE_MODEL_IN_DB=True
- Added 4 unit tests for empty model list scenarios
Adds log_format parameter supporting json_array (default), ndjson, and single formats. NDJSON format enables webhook integrations like Sumo Logic to parse individual log records at ingest time. Defaults to json_array for backward compatibility.
* fix(cost_calculator): correct gpt-image-1 cost calculation using token-based pricing (#13847)
gpt-image-1 uses token-based pricing (like chat models), not pixel-based pricing
like DALL-E. The old code was calculating incorrect costs by treating it as DALL-E.
Changes:
- Update model pricing JSON with correct token-based costs for gpt-image-1
- Add dedicated cost calculator for OpenAI gpt-image models
- Route gpt-image-1 to token-based calculator in cost router
- Add comprehensive tests for the new calculator
* refactor: simplify gpt-image-1 cost calculator using responses API helper
Reuse _transform_response_api_usage_to_chat_usage and generic_cost_per_token
for gpt-image-1 cost calculation since ImageUsage has the same spec as
ResponseAPIUsage.
