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Baseten vs Letta

Letta scores higher on the AgentReady, 72/100 against 59/100. They differ on 8 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Baseten. Baseten is an AI inference platform that provides the fastest model runtimes, cross-cloud high availability, and seamless developer workflows.

Letta. Letta is an AI research lab in San Francisco building machines that learn.

Where Baseten is ahead

Baseten passes structured api reference, and Letta 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 adopt: no mandatory sales call. Letta misses it.

Where Letta is ahead

Letta passes mcp discoverable, and Baseten does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: authentication documented and limits / constraints documented. Baseten misses those.

And on adopt, mcp integration available. Baseten misses it.

Finally, on operate, structured, predictable output and agent compatibility verified. Baseten misses those.

What neither does

Both fail openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, programmatic credential creation, 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. Letta leads 100 to 87. Baseten misses mcp discoverable; Letta misses nothing.

Understand. Both sit at 38/100 here. Baseten misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Letta misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented.

Adopt. Letta leads 81 to 75. Baseten misses programmatic credential creation, mcp integration available; Letta misses no mandatory sales call, programmatic credential creation.

Operate is whether an agent can run against it in production and recover when a call fails. Letta leads 67 to 35. Baseten misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Letta misses machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable.

Pricing

Baseten does not publish a machine-readable starting price and has a free tier. Letta starts at $0/mo and has a free tier.

Signal by signal

Which to pick

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

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