# Vercel AI SDK vs OpenAI Agents SDK: license, pricing and features compared (October 2026)

Canonical: https://theagenticweekly.com/compare/vercel-ai-sdk-vs-openai-agents-sdk · Last verified: 2026-10-26 · Published: 2026-10-25 · Author: Agentic Weekly (operated independently from Texas, US) · Evidence: Evidence: Both tools have a Tested entry (scope on each tool page). The facts in the tables were read from each vendor's own pages and the public GitHub API on 2026-10-25 (America/Chicago) and are Reported. The What we measured section lists what we have actually run, with links to the test logs, and what we have not run yet; anything we could not confirm is marked as not captured.

**Our pick:** Pick Vercel AI SDK for typeScript and Next.js teams building chat or agent UIs; pick OpenAI Agents SDK for python developers building agents on OpenAI models. No overall winner: we have not benchmarked them against each other. **Updated:** 2026-10-26 (America/Chicago).

> Vercel AI SDK and OpenAI Agents SDK are both listed under Agent building. License: Vercel AI SDK is Apache-2.0 (per LICENSE file); OpenAI Agents SDK is MIT. GitHub stars on Oct 25, 2026: OpenAI Agents SDK 30,279 (openai/openai-agents-python) vs Vercel AI SDK 27,511 (vercel/ai). Stars measure attention, not quality. Vercel AI SDK is the better fit for: TypeScript and Next.js teams building chat or agent UIs. OpenAI Agents SDK is the better fit for: Python developers building agents on OpenAI models. Facts were read from vendor and GitHub pages on Oct 25, 2026 and are Reported; what we ran ourselves is under What we measured.

## What we measured

We ran both Vercel AI SDK and OpenAI Agents SDK ourselves; the table links each full test log. These are smoke tests on one CPU-only machine, not benchmarks. Both ran the same task on the same local model, so the two results are comparable on that one task only. Model-driven runs used a small local Qwen2.5-3B-Instruct model.

Table: Our own tests for Vercel AI SDK and OpenAI Agents SDK

| Test | Vercel AI SDK | OpenAI Agents SDK |
|---|---|---|
| Hands-on test log (install and a real task) | Tested: Vercel AI SDK 6.0.315 (Node 20) / 7.0.153 (Node 24), Oct 25, 2026: passed. Vercel AI SDK passed our one-tool task 3 of 3 on Node 20 (ai 6.0.315) and 3 of 3 on Node 24 (ai 7.0.153); the install is 26 to 27 MB. [Full test log](https://theagenticweekly.com/tests/vercel-ai-sdk) | Tested: OpenAI Agents SDK for JavaScript 0.21.0, Oct 25, 2026: passed. OpenAI Agents SDK for JS (0.21.0) passed 2 of 5 (Node 20) and 1 of 5 (Node 24) at default sampling but 5 of 5 on both Node versions once temperature was pinned to 0. [Full test log](https://theagenticweekly.com/tests/openai-agents-js) |

How we test and label results: [methodology](https://theagenticweekly.com/methodology#testing-rig). All test logs: [test hub](https://theagenticweekly.com/tests).

## Vercel AI SDK vs OpenAI Agents SDK at a glance

Vercel AI SDK and OpenAI Agents SDK are both listed under Agent building. Agentic Weekly's Vercel AI SDK page names OpenAI Agents SDK as an alternative. Vercel AI SDK: Vercel's TypeScript SDK that gives one API across many model providers, with streaming and agent helpers. OpenAI Agents SDK: Pick it if you want a small, official framework for multi-agent flows on the OpenAI API; the update is incremental.

Table: Vercel AI SDK and OpenAI Agents SDK side by side (vendor pages and GitHub, 2026-10-25)

|  | Vercel AI SDK | OpenAI Agents SDK |
|---|---|---|
| Vendor | Vercel | OpenAI |
| Listed under | Agent building | Agent building |
| License | Apache-2.0 (per LICENSE file) | MIT |
| Pricing model | Free and open source | Not captured on the pages we read |
| Free tier | Free to self-host | Not captured on the pages we read |
| Paid plans | None listed for the library | Not captured on the pages we read |
| Platforms | TypeScript / JavaScript | Not captured on the pages we read |
| Public repository | vercel/ai: 27,511 stars, last push Oct 26, 2026 UTC (GitHub API, Oct 25, 2026) | openai/openai-agents-python: 30,279 stars, last push Oct 22, 2026 UTC (GitHub API, Oct 25, 2026) |
| Latest release we saw | Oct 24, 2026 | v0.24.0, Oct 15, 2026 |
| Evidence | Tested (scope on its tool page) | Tested (scope on its tool page) |

## How Vercel AI SDK and OpenAI Agents SDK differ

- License: Vercel AI SDK is Apache-2.0 (per LICENSE file); OpenAI Agents SDK is MIT.
- GitHub stars on Oct 25, 2026: OpenAI Agents SDK 30,279 (openai/openai-agents-python) vs Vercel AI SDK 27,511 (vercel/ai). Stars measure attention, not quality.
- Vercel AI SDK is "Free and open source"; the entry for OpenAI Agents SDK has no pricing model we could confirm (pricing not verified).
- Latest release we saw: Vercel AI SDK's newest release on Oct 24, 2026; OpenAI Agents SDK v0.24.0 on Oct 15, 2026 (9 days earlier).
- Vercel AI SDK's pricing details were captured; OpenAI Agents SDK's were not published or could not be read, so a price comparison would be one-sided.

## Which should you pick?

- Pick Vercel AI SDK if: TypeScript and Next.js teams building chat or agent UIs. Skip it if: you work in Python.
- Pick OpenAI Agents SDK if: Python developers building agents on OpenAI models; teams that want MCP tools plus approvals and sessions. Skip it if: you need a TypeScript-first framework.

## Strengths and limits

Table: Strengths and limits as listed on each tool page

|  | Vercel AI SDK | OpenAI Agents SDK |
|---|---|---|
| Strengths | Apache-2.0; Provider-agnostic | MIT license, official OpenAI project; Small surface area; MCP, sessions and tracing support |
| Limits | JavaScript ecosystem only; Our test was one small task on a local 3B model; it does not show behaviour with hosted models or larger jobs | Releases are mostly dependency bumps and fixes; Works best with OpenAI models; We only ran it against a local model through the Chat Completions class, not OpenAI's hosted models |

## What we did not verify

- OpenAI Agents SDK: Support for non-OpenAI models.
- Output quality, speed and reliability beyond the smoke tests listed under What we measured: not compared.

## FAQ

### Is Vercel AI SDK or OpenAI Agents SDK open source?

Vercel AI SDK: Apache-2.0 (per LICENSE file). OpenAI Agents SDK: MIT. Licenses come from each project's GitHub repository or the vendor's own pages, read Oct 25, 2026; read the license text itself before redistributing or building a competing service.

### Does Vercel AI SDK or OpenAI Agents SDK have a free plan?

Vercel AI SDK: Free: to self-host. OpenAI Agents SDK: we did not capture free-tier details. Checked Oct 25, 2026; prices and limits change, so confirm on each vendor's page.

### Which was updated more recently, Vercel AI SDK or OpenAI Agents SDK?

Vercel AI SDK's newest release we saw is (Oct 24, 2026); OpenAI Agents SDK's is v0.24.0 (Oct 15, 2026). Read Oct 25, 2026 from the official release page or repository; a newer date is not a quality ranking.

### What is the main difference between Vercel AI SDK and OpenAI Agents SDK?

License: Vercel AI SDK is Apache-2.0 (per LICENSE file); OpenAI Agents SDK is MIT. GitHub stars on Oct 25, 2026: OpenAI Agents SDK 30,279 (openai/openai-agents-python) vs Vercel AI SDK 27,511 (vercel/ai). Stars measure attention, not quality.

## Sources

- [AI SDK](https://ai-sdk.dev/) (fetched 2026-10-25)
- [AI SDK repository (GitHub)](https://github.com/vercel/ai) (fetched 2026-10-25)
- [openai-agents-python v0.24.0 release](https://github.com/openai/openai-agents-python/releases/tag/v0.24.0) (fetched 2026-10-25)
- [README](https://github.com/openai/openai-agents-python) (fetched 2026-10-25)

## Related

- [Vercel AI SDK facts and sources](https://theagenticweekly.com/tools/vercel-ai-sdk)
- [OpenAI Agents SDK facts and sources](https://theagenticweekly.com/tools/openai-agents-sdk)
- [Alternatives to OpenAI Agents SDK](https://theagenticweekly.com/alternatives/openai-agents-sdk)
- [Agent building: all tools we track](https://theagenticweekly.com/best/agent-building)
- [Mastra vs Vercel AI SDK](https://theagenticweekly.com/compare/mastra-vs-vercel-ai-sdk)
- [LangChain vs Vercel AI SDK](https://theagenticweekly.com/compare/langchain-vs-vercel-ai-sdk)
- [Google ADK vs OpenAI Agents SDK](https://theagenticweekly.com/compare/google-adk-vs-openai-agents-sdk)
- [AutoGen vs OpenAI Agents SDK](https://theagenticweekly.com/compare/autogen-vs-openai-agents-sdk)

## Changelog

- 2026-10-25: First published. Facts read from vendor pages and the GitHub API on 2026-10-25.

## How to cite

Agentic Weekly, "Vercel AI SDK vs OpenAI Agents SDK: license, pricing and features compared (October 2026)", last updated 2026-10-26, https://theagenticweekly.com/compare/vercel-ai-sdk-vs-openai-agents-sdk