What happened: BAML 0.20.1

BAML 0.20.1 released with simplified streaming, bigint JSON support, TypeSafe JEV client integration, and memory optimizations.

Why it matters: BAML 0.20.1

Matters for engineers using BAML for AI function calling who need better streaming, precise numeric handling, or improved performance under load.

Watch out: BAML 0.20.1

Breaking changes present; streaming API changed from partial types to single type. Upgrade toolchain and SDKs together. Version 0.20.0 had critical Linux build issues; skip it.

In the news

BAML 0.20.1

BoundaryML · Published September 20, 2026 · 3 min read

In 30 seconds

What happened: BAML 0.20.1 released with simplified streaming, bigint JSON support, TypeSafe JEV client integration, and memory optimizations.
Why it matters: Matters for engineers using BAML for AI function calling who need better streaming, precise numeric handling, or improved performance under load.
Watch out: Breaking changes present; streaming API changed from partial types to single type. Upgrade toolchain and SDKs together. Version 0.20.0 had critical Linux build issues; skip it.

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