AI Infra Bench

AI Infra Bench measures OpenAI-compatible inference endpoints, evaluates model outputs, and finds the highest load that satisfies a service-level objective. It is backend-independent and does not require a serving framework SDK.

Install

pip install ai-infra-bench

Python 3.10 or newer is required.

CLI

Send one request:

aib req --base-url http://127.0.0.1:30000 --prompt "Who are you?"

Run a random-token benchmark:

aib bench \
  --base-url http://127.0.0.1:30000 \
  --dataset random \
  --input-len 1024 \
  --output-len 256 \
  --random-range-ratio 0.5 \
  --num-requests 100 \
  --max-concurrency 16

When --random-range-ratio is set, each random request samples its input and output length uniformly from the configured ratio of the target length up to the target length. The default value of 1.0 preserves fixed-length requests.

Run the packaged GPQA Diamond multiple-choice workload (198 questions):

aib bench \
  --base-url http://127.0.0.1:30000 \
  --dataset gpqa \
  --num-requests 198 \
  --max-concurrency 16

Evaluate the text-only portion of Humanity's Last Exam directly through a chat-completions endpoint. Local JSONL files are supported; image questions are skipped because this adapter does not require a multimodal runtime:

aib eval-dataset \
  --evals hle \
  --dataset-path ./hle.jsonl \
  --num-shots 0 \
  --num-questions 20 \
  --base-url http://127.0.0.1:30000 \
  --model your-model

Other commands cover dataset evaluation, logits and hidden-state comparison, metric plotting, and local Prometheus monitoring:

aib --help

Replay session-shaped JSONL payloads with one concurrency slot per session:

aib session-bench 'sessions/**/*.jsonl' \
  --max-concurrency 16 \
  --num-warmup-sessions 3

Requests in each file are sent in order. Different files run concurrently up to --max-concurrency.

SLO Search

SLO searches are configured in YAML. The command probes the configured range and returns the highest max_concurrency or request_rate that satisfies every condition:

endpoint:
  base_url: http://127.0.0.1:30000
  api_key: EMPTY
  model: null
request:
  payload:
    messages:
      - role: user
        content: hello
benchmark:
  num_requests: 100
  warmup_requests: 5
  max_concurrency: 32
  request_rate: inf
search:
  parameter: max_concurrency
  min: 1
  max: 64
conditions:
  - metric: success_rate
    operator: ">="
    value: 0.99
  - metric: p99_latency_ms
    operator: "<"
    value: 3000

Run it with:

aib slo examples/slo.yaml -o slo-result.yaml

Output

SLO runs write a YAML report with every probe, its metrics, and condition results. Request benchmarks can also write machine-readable JSON or JSONL metrics for later visualization.

Development

python -m pip install -e .
pytest

Licensed under the Apache License 2.0.