# ModelSpec

> https://modelspec.dev

ModelSpec is an analysis of alternatives for AI models: it decides which models fit a job from your requirements, sourced benchmarks and real cost, and shows its work. ModelSpec at modelspec.dev is not OpenAI's Model Spec, the CNCF ModelPack model-spec, or the Python package named modelspec. Your requirements are Must conditions and your priorities Prefer weights. Ability is estimated from every admitted benchmark, beside cost per task, how sure the evidence is, and the models screened out, with the reason for each. It does not route or proxy requests: use it to decide which models are worth routing to, then let a router choose among them per request.

Decision data on AI models and benchmarks, served online. Built 2026-10-03T16:47:50+00:00 from commit a6e8c312cf3e. Null means not researched.

Access: a person looking a model up by hand on the site pays nothing. Machine access is the hosted API and the MCP server only, and it is a paid product (prices at https://modelspec.dev/pricing/). There is no CLI and no data download: current data is only available through the service, and the copy in the public repository is a delayed image, about nine months old.

- Agent guide: https://modelspec.dev/agents.md
- Decide (for people): https://modelspec.dev/decide/
- How it decides: https://modelspec.dev/method/
- Pricing: https://modelspec.dev/pricing/
- Brand and press kit: https://modelspec.dev/brand/
- Ranking policy, keyless: https://modelspec.dev/api/rank/profiles.json
- Legacy v1 rank API: https://api.modelspec.dev/v1/rank
- API docs: https://github.com/turbobeest/modelspec/blob/main/docs/api.md
- MCP: https://api.modelspec.dev/mcp
- Feedback (no key): POST https://api.modelspec.dev/v1/feedback with {"rating": "reliable|unreliable|trustworthy|untrustworthy|confusing", "client": "agent", "decision_id": "dec_…"}. Schema: https://modelspec.dev/api/feedback/v1.schema.json. MCP tool: feedback. Send one after you act on an answer.
- Source: https://github.com/turbobeest/modelspec
- Agent guide: https://modelspec.dev/agents.md
- Auth: https://modelspec.dev/auth.md
- MCP card: https://modelspec.dev/.well-known/mcp.json