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OpenRouter vs Vespa

OpenRouter scores higher on the AgentReady, 81/100 against 56/100. They differ on 12 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

OpenRouter. OpenRouter is a unified interface for AI models that provides access to hundreds of AI models through a single API endpoint.

Vespa. Vespa.ai develops the Vespa AI Search Platform, a distributed serving engine that unifies retrieval, ranking, machine learning inference, and real-time serving for business-critical AI applications.

Where OpenRouter is ahead

OpenRouter passes authentication documented, and Vespa does not. That is understand, whether an agent can read the docs and work out how the API behaves before calling it.

It also holds operate: agent compatibility verified. Vespa misses it.

Where Vespa is ahead

Vespa passes search discoverable and public docs discoverable, and OpenRouter does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: limits / constraints documented. OpenRouter misses it.

And on adopt, fast time to first request, copyable quickstart, official typescript sdk, official python sdk and cli available. OpenRouter misses those.

Finally, on operate, canonical workflow succeeds and observable execution. OpenRouter misses those.

What neither does

Both fail mcp discoverable, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, no mandatory sales call, programmatic credential creation, mcp integration available, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable. If your agent needs any of those, you will be building it yourself either way.

Score, pillar by pillar

The AgentReady splits into four pillars, scored separately, because a product can be easy to find and still impossible to adopt.

Discover. OpenRouter leads 100 to 87. OpenRouter misses search discoverable, public docs discoverable, mcp discoverable; Vespa misses mcp discoverable.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. OpenRouter leads 92 to 46. OpenRouter misses openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Vespa misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented.

Adopt. OpenRouter leads 88 to 55. OpenRouter misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, official typescript sdk, official python sdk, cli available, mcp integration available; Vespa misses no mandatory sales call, agent-compatible signup flow, programmatic credential creation, mcp integration available.

Operate. OpenRouter leads 44 to 35. OpenRouter misses canonical workflow succeeds, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution; Vespa misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

OpenRouter does not publish a machine-readable starting price and has a free tier. Vespa starts at $0.05/hour with no free tier.

Signal by signal

Which to pick

Vespa clears more of the signals an agent needs, so it is the safer default for unattended use. Full profiles: OpenRouter and Vespa. Alternatives to each: OpenRouter, Vespa.

An agent can fetch this as data: POST /v1/compare {"slugs": ["openrouter", "vespa"]}