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How vLLM’s scores are calculated

The full audit trail, recomputed from the verdict data at build time through the same code that produced the leaderboard: verdict × quality × story weight per cell, cells sum to dimension scores, dimensions blend into the PA Score. Every number on the product page is reproducible from this page alone; for why the formula looks like this, see the methodology.

verdict factors: full ×1.0 · partial ×0.6 · disputed ×0.3 · none ×0.0 · n/a excluded from both sides · cell points = weight × quality × factor · cell max = weight × 10

PA Score29/100

Agent-ready 25.3 × 0.30 = 7.59

API quality 0.0 × 0.20 = 0.00

Openness 62.4 × 0.20 = 12.48

Built-in AI n/a — excluded, its ×0.15 weight renormalized away

Automation 30.0 × 0.15 = 4.50

(7.59 + 0.00 + 12.48 + 4.50) ÷ (0.30 + 0.20 + 0.20 + 0.15) = 24.57 ÷ 0.85 = 28.9 — weights renormalized over the scored components

Scores are stored to 1 decimal; the product page’s pills round to whole numbers for display. Each dimension below shows the stories, verdicts, and cited evidence behind its number.

Agent-ready25.3/100×0.30 of the PA blend

Outside-in: can YOUR agent reach and drive this product — API, MCP, CLI, headless runs, agent docs.

Point an agent at llms.txt or agent-oriented docsweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [probe] https://docs.vllm.ai/llms.txtPROBE llms.txt: HTTP 404 at https://docs.vllm.ai/llms.txt

Run the product headlessly / in CI for automationweight 2

2 (weight) × 6 (quality) × 0.6 (partial) = 7.2 of 20 max

  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support
  • [github] https://github.com/vllm-project/vllmInstall vLLM with uv (recommended) or pip:
  • [github] https://github.com/vllm-project/vllmOr build from source for development.

Plug MCP servers into this product so it can use their toolsweight 3

n/a — not applicable to this product: excluded from numerator and denominator

  • [claimed-docs] https://docs.vllm.aiTool calling and reasoning parsers
  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support

Connect an agent via an official MCP serverweight 3

3 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 30 max

  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support

Use an official CLIweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Drive the product through a documented public APIweight 3

3 (weight) × 8 (quality) × 1.0 (full) = 24.0 of 30 max

  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support
  • [community] https://news.ycombinator.com/item?id=36409082Cool, I prefer the OpenAI-Compatible api. Although this is not very technically difficult, it is really intimate, because it make me feel free to use all ChatGPT applications.
  • [community] https://news.ycombinator.com/item?id=44407058We use vLLM kv cache and continuous batching as a foundation for requests in ScalarLM and also add batching optimizations in a centralized queue and by adding explicit batching support in our client... There is more perf you can squeeze out of vLLM.

Issue scoped/least-privilege API credentials for an agentweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Build against official SDKsweight 2

2 (weight) × 5 (quality) × 0.6 (partial) = 6.0 of 20 max

  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support
  • [community] https://news.ycombinator.com/item?id=36409082Cool, I prefer the OpenAI-Compatible api. Although this is not very technically difficult, it is really intimate, because it make me feel free to use all ChatGPT applications.

Subscribe to events via webhooksweight 2

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Connect a coding agent to this product as a working backendweight 3

3 (weight) × 6 (quality) × 0.6 (partial) = 10.8 of 30 max

  • [claimed-docs] https://docs.vllm.aiTool calling and reasoning parsers
  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support
  • [claimed-docs] https://docs.vllm.aiStreaming outputs
  • [community] https://news.ycombinator.com/item?id=36409082Cool, I prefer the OpenAI-Compatible api. Although this is not very technically difficult, it is really intimate, because it make me feel free to use all ChatGPT applications.
  • [community] https://news.ycombinator.com/item?id=49202852vLLM is originally marketed as paged attention, but in hindsight, separating the web server and GPU process, continuous batching, kv caching / chunking, and a huge model library including low precision mattered more.

Agent-ready = 48.0 ÷ 190 × 100 = 25.3

API quality0.0/100×0.20 of the PA blend

The programmable surface once an agent is there — machine-readable spec, interactive docs, sandbox, versioning discipline.

Explore an interactive API reference with runnable examplesweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support
  • [probe] https://docs.vllm.ai/llms.txtPROBE llms.txt: HTTP 404 at https://docs.vllm.ai/llms.txt

Download a machine-readable API spec (OpenAPI or equivalent)weight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support
  • [probe] https://docs.vllm.ai/llms.txtPROBE llms.txt: HTTP 404 at https://docs.vllm.ai/llms.txt

Test against a sandbox environment without touching production dataweight 1

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Rely on versioned APIs with a documented deprecation policyweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

API quality = 0.0 ÷ 60 × 100 = 0.0

Openness62.4/100×0.20 of the PA blend

Can you leave, inspect, or self-host — data export, open source, portability.

Do everything through the API that I can do in the UIweight 2

n/a — not applicable to this product: excluded from numerator and denominator

  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support

Export all of my data in open formats and leaveweight 3

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Read the product's source under an open licenseweight 2

2 (weight) × 6 (quality) × 0.6 (partial) = 7.2 of 20 max

  • [github] https://github.com/vllm-project/vllmInstall vLLM with uv (recommended) or pip:
  • [github] https://github.com/vllm-project/vllmOr build from source for development.

Self-host the core productweight 3

3 (weight) × 8 (quality) × 1.0 (full) = 24.0 of 30 max

  • [github] https://github.com/vllm-project/vllmInstall vLLM with uv (recommended) or pip:
  • [github] https://github.com/vllm-project/vllmOr build from source for development.
  • [claimed-docs] https://docs.vllm.aiSupport for NVIDIA GPUs, AMD GPUs, and x86/ARM/PowerPC CPUs. Additionally, diverse hardware plugins such as Google TPUs, Intel Gaudi, IBM Spyre, Huawei Ascend, Rebellions NPU, Apple Silicon, MetaX GPU, and more.
  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support
  • [community] https://news.ycombinator.com/item?id=44407058We use vLLM kv cache and continuous batching as a foundation for requests in ScalarLM and also add batching optimizations in a centralized queue and by adding explicit batching support in our client... There is more perf you can squeeze out of vLLM.

Openness = 31.2 ÷ 50 × 100 = 62.4

Built-in AIn/a×0.15 of the PA blend

Inside-out: how agentic the product itself is for its users — built-in assistants, autonomous features.

Get AI-generated insights and suggestions from my data inside the productweight 2

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Set up automations that run autonomously in the backgroundweight 2

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Delegate tasks to a built-in AI assistant inside the productweight 3

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Operate the product with natural-language commandsweight 2

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

every cell n/a — unscored (not zero), excluded from the blend

Automation30.0/100×0.15 of the PA blend

Depth of automation primitives — rules, scheduling, bulk operations, webhooks.

Perform bulk operations across many items at onceweight 2

2 (weight) × 5 (quality) × 0.6 (partial) = 6.0 of 20 max

  • [claimed-docs] https://docs.vllm.aiContinuous batching of incoming requests, chunked prefill, prefix caching
  • [community] https://news.ycombinator.com/item?id=44407058We use vLLM kv cache and continuous batching as a foundation for requests in ScalarLM and also add batching optimizations in a centralized queue and by adding explicit batching support in our client... There is more perf you can squeeze out of vLLM.
  • [claimed-docs] https://docs.vllm.aiOpenAI-compatible API server, plus Anthropic Messages API and gRPC support

Define rules that trigger actions automatically on eventsweight 3

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Schedule recurring jobs or workflowsweight 2

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Version, review, and roll back my automationsweight 1

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Automation = 6.0 ÷ 20 × 100 = 30.0