BAML vs Vercel AI SDK vs Vellum vs LiteLLM
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
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Vercel AI SDK
Provider-agnostic TypeScript SDK for streaming AI apps
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Vellum
LLM application development platform
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LIT LiteLLM Open-source AI gateway: one OpenAI-format API for 100+ LLM providers Visit | |
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| RECATOOLS Score | 7.7 / 10 | 8.4 / 10 | 7.3 / 10 | 8 / 10 |
| Capability | — | |||
| Value for money | — | |||
| Ease of use | — | |||
| ASEAN readiness | — | |||
| API quality | — | |||
| Pricing | Open Source | Open Source | Subscription | Freemium |
| Free tier | — | — | — | Full open-source proxy + SDK, free to self-host (MIT outside the enterprise/ directory) |
| Paid from | — | — | — | Custom (LiteLLM Enterprise — contact sales; 30-day evaluation key) |
| Has API | ✓ | ✓ | ✓ | ✓ |
| Open source | ✓ | ✓ | ✗ | ✓ |
| Free to use | ✓ | ✓ | ✗ | ✓ |
| Users | — | — | — | — |
| Founded | — | 2023 | 2023 | — |
| Maker | — | — | — | — |
| Verdict | BAML treats the LLM call itself as the unreliable part of the stack and fixes that at the language level: you write a schema, BAML generates a strict client and parser that either returns valid data or fails loudly, inst... |
The Vercel AI SDK has become the default way JavaScript developers wire an LLM into an app — a single interface over OpenAI, Anthropic, Google and more than a dozen other providers, with streaming, structured output and... |
Vellum is an LLM application development platform combining a visual workflow editor, prompt management/versioning, systematic evaluation and deployment without code redeploys. It is model-agnostic across OpenAI, Anthrop... |
What this is for: putting one OpenAI-format API in front of every model provider you use. LiteLLM ships as a Python SDK (litellm.completion) and a proxy/gateway server that adds virtual API keys, per-team budgets, rate l... |
| Full review → | Full review → | Full review → | Full review → |
Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.