Vercel AI SDK vs Mastra vs raw Anthropic SDK — production comparison

TL;DR

Built the same agent three times: Vercel AI SDK, Mastra, raw Anthropic SDK. Latency / cost / ergonomics matrix and what I’d default to next.

Built the same agent three times: Vercel AI SDK, Mastra, raw Anthropic SDK. Latency / cost / ergonomics matrix and what I'd default to next.

The setup

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What I found

Drop the actual findings here — three or four substantive paragraphs, with a specific framework or numeric outcome. The TOC block to the side will pick up these H2s automatically.

Subsection

Use H3 sparingly — the TOC nests them under the parent H2 in the rail variant. Don’t go deeper than H3 in normal posts.

What I’d do differently

End with a concrete framework or recommendation. Specific is better than universal.

Why trust this

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