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.txt“PROBE 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.ai“OpenAI-compatible API server, plus Anthropic Messages API and gRPC support”
- [github] https://github.com/vllm-project/vllm“Install vLLM with uv (recommended) or pip:”
- [github] https://github.com/vllm-project/vllm“Or 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.ai“Tool calling and reasoning parsers”
- [claimed-docs] https://docs.vllm.ai“OpenAI-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.ai“OpenAI-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.ai“OpenAI-compatible API server, plus Anthropic Messages API and gRPC support”
- [community] https://news.ycombinator.com/item?id=36409082“Cool, 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=44407058“We 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.ai“OpenAI-compatible API server, plus Anthropic Messages API and gRPC support”
- [community] https://news.ycombinator.com/item?id=36409082“Cool, 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.ai“Tool calling and reasoning parsers”
- [claimed-docs] https://docs.vllm.ai“OpenAI-compatible API server, plus Anthropic Messages API and gRPC support”
- [claimed-docs] https://docs.vllm.ai“Streaming outputs”
- [community] https://news.ycombinator.com/item?id=36409082“Cool, 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=49202852“vLLM 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.ai“OpenAI-compatible API server, plus Anthropic Messages API and gRPC support”
- [probe] https://docs.vllm.ai/llms.txt“PROBE 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.ai“OpenAI-compatible API server, plus Anthropic Messages API and gRPC support”
- [probe] https://docs.vllm.ai/llms.txt“PROBE 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.ai“OpenAI-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
Self-host the core productweight 3
3 (weight) × 8 (quality) × 1.0 (full) = 24.0 of 30 max
- [github] https://github.com/vllm-project/vllm“Install vLLM with uv (recommended) or pip:”
- [github] https://github.com/vllm-project/vllm“Or build from source for development.”
- [claimed-docs] https://docs.vllm.ai“Support 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.ai“OpenAI-compatible API server, plus Anthropic Messages API and gRPC support”
- [community] https://news.ycombinator.com/item?id=44407058“We 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.ai“Continuous batching of incoming requests, chunked prefill, prefix caching”
- [community] https://news.ycombinator.com/item?id=44407058“We 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.ai“OpenAI-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