Compare frameworks
Pydantic AI vs DSPy vs Vercel AI SDK
Every figure below carries the source that reported it and the moment it was observed. Values that failed validation are withheld rather than shown, and a dash means no source we track carries that field for that framework.
| Field | Pydantic AI | DSPy | Vercel AI SDK |
|---|---|---|---|
| Stars | 20,220Synced from sourceCurrent5h ago | 38,388 (highest of the compared values)Synced from sourceCurrent5h ago | 27,001Synced from sourceCurrent5h ago |
| downloads | 3,076,771Synced from sourceStale1mo ago· past SLA | — | 29,813,554 (highest of the compared values)Synced from sourceCurrent5h ago |
| Last commit | 2026-09-28Synced from sourceCurrent5h ago | 2026-09-27Synced from sourceCurrent5h ago | 2026-09-28Synced from sourceCurrent5h ago |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago | typescriptSeeded, unreviewedwritten 1mo ago |
| Licence | MITSynced from sourceCurrent5h ago | MITSynced from sourceCurrent5h ago | — |
| Archived | noSynced from sourceCurrent5h ago | noSynced from sourceCurrent5h ago | noSynced from sourceCurrent5h ago |
| Category | structured-outputSeeded, unreviewedwritten 1mo ago | optimisationSeeded, unreviewedwritten 1mo ago | orchestrationSeeded, unreviewedwritten 1mo ago |
| Contributors | 609Synced from sourceCurrent5h ago | 461Synced from sourceCurrent5h ago | 719Synced from sourceCurrent5h ago |
| Forks | 2796Synced from sourceCurrent5h ago | 3372Synced from sourceCurrent5h ago | 5207Synced from sourceCurrent5h ago |
| Maintainer | PydanticSeeded, unreviewedwritten 1mo ago | Stanford NLPSeeded, unreviewedwritten 1mo ago | VercelSeeded, unreviewedwritten 1mo ago |
| npm downloads, monthly | — | — | 92989638Synced from sourceCurrent5h ago |
| npm downloads, weekly | — | — | 29813554Synced from sourceCurrent5h ago |
| npm package | — | — | aiSynced from sourceCurrent5h ago |
| npm window ends | — | — | 2026-09-26Synced from sourceCurrent5h ago |
| Open issues | 1013Synced from sourceCurrent5h ago | 739Synced from sourceCurrent5h ago | 1450Synced from sourceCurrent5h ago |
| PyPI downloads, monthly | 13478631Synced from sourceStale1mo ago· past SLA | — | — |
| PyPI downloads, weekly | 3076771Synced from sourceStale1mo ago· past SLA | — | — |
| PyPI package | pydantic-aiSynced from sourceCurrent5h ago | dspy-aiSynced from sourceCurrent5h ago | — |
| PyPI released | 2026-09-25T23:32:17.554286ZSynced from sourceCurrent5h ago | 2026-09-25T04:04:30.339197ZSynced from sourceCurrent5h ago | — |
| Requires Python | >=3.10Synced from sourceCurrent5h ago | >=3.9Synced from sourceCurrent5h ago | — |
| PyPI version | 2.51.0Synced from sourceCurrent5h ago | 3.4.0Synced from sourceCurrent5h ago | — |
| Repository | https://github.com/pydantic/pydantic-aiSynced from sourceCurrent5h ago | https://github.com/stanfordnlp/dspySynced from sourceCurrent5h ago | https://github.com/vercel/aiSynced from sourceCurrent5h ago |
Sources: GitHub REST API, npm registry downloads, PyPI registry metadata, pypistats.org downloads. Most recent observation 5h ago. Where a row is marked, ▲ is the highest of the values shown and ▼ the lowest — arithmetic on the figures above, not a ranking or a recommendation. Rows where neither extreme is meaningful are left unmarked rather than given a direction they do not have.
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