5cdb29758a
This adds initial streaming support to the Responses API. This PR makes sure that the _first_ inference call made to chat completions streams out. There's more to be done: - tool call output tokens need to stream out when possible - we need to loop through multiple rounds of inference and they all need to stream out. ## Test Plan Added a test. Executed as: ``` FIREWORKS_API_KEY=... \ pytest -s -v 'tests/verifications/openai_api/test_responses.py' \ --provider=stack:fireworks --model meta-llama/Llama-4-Scout-17B-16E-Instruct ``` Then, started a llama stack fireworks distro and tested against it like this: ``` OPENAI_API_KEY=blah \ pytest -s -v 'tests/verifications/openai_api/test_responses.py' \ --base-url http://localhost:8321/v1/openai/v1 \ --model meta-llama/Llama-4-Scout-17B-16E-Instruct ``` |
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|---|---|---|
| .. | ||
| conf | ||
| openai_api | ||
| test_results | ||
| __init__.py | ||
| conftest.py | ||
| generate_report.py | ||
| openai-api-verification-run.yaml | ||
| README.md | ||
| REPORT.md | ||
Llama Stack Verifications
Llama Stack Verifications provide standardized test suites to ensure API compatibility and behavior consistency across different LLM providers. These tests help verify that different models and providers implement the expected interfaces and behaviors correctly.
Overview
This framework allows you to run the same set of verification tests against different LLM providers' OpenAI-compatible endpoints (Fireworks, Together, Groq, Cerebras, etc., and OpenAI itself) to ensure they meet the expected behavior and interface standards.
Features
The verification suite currently tests the following in both streaming and non-streaming modes:
- Basic chat completions
- Image input capabilities
- Structured JSON output formatting
- Tool calling functionality
Report
The lastest report can be found at REPORT.md.
To update the report, ensure you have the API keys set,
export OPENAI_API_KEY=<your_openai_api_key>
export FIREWORKS_API_KEY=<your_fireworks_api_key>
export TOGETHER_API_KEY=<your_together_api_key>
then run
uv run --with-editable ".[dev]" python tests/verifications/generate_report.py --run-tests
Running Tests
To run the verification tests, use pytest with the following parameters:
cd llama-stack
pytest tests/verifications/openai_api --provider=<provider-name>
Example:
# Run all tests
pytest tests/verifications/openai_api --provider=together
# Only run tests with Llama 4 models
pytest tests/verifications/openai_api --provider=together -k 'Llama-4'
Parameters
--provider: The provider name (openai, fireworks, together, groq, cerebras, etc.)--base-url: The base URL for the provider's API (optional - defaults to the standard URL for the specified provider)--api-key: Your API key for the provider (optional - defaults to the standard API_KEY name for the specified provider)
Supported Providers
The verification suite supports any provider with an OpenAI compatible endpoint.
See tests/verifications/conf/ for the list of supported providers.
To run on a new provider, simply add a new yaml file to the conf/ directory with the provider config. See tests/verifications/conf/together.yaml for an example.
Adding New Test Cases
To add new test cases, create appropriate JSON files in the openai_api/fixtures/test_cases/ directory following the existing patterns.
Structure
__init__.py- Marks the directory as a Python packageconf/- Provider-specific configuration filesopenai_api/- Tests specific to OpenAI-compatible APIsfixtures/- Test fixtures and utilitiesfixtures.py- Provider-specific fixturesload.py- Utilities for loading test casestest_cases/- JSON test case definitions
test_chat_completion.py- Tests for chat completion APIs