Anthropic vs OpenAI

Anthropic and OpenAI both appear on the Smoower Developer Ecosystem Index.

OpenAI (rank #22) holds a narrow lead over Anthropic (rank #44) on the overall Smoower ecosystem score (66 vs 63). The gap of 3 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), OpenAI is ahead of Anthropic. On education (docs, guides and learning material for developers), Anthropic is ahead of OpenAI. On community (issue response, PR reviews and discussion health), OpenAI is ahead of Anthropic. On reach (how visible the ecosystem is beyond its own repos), OpenAI is ahead of Anthropic. On momentum (release cadence and how fast the ecosystem moves), OpenAI is clearly ahead of Anthropic.

Anthropic carries 609,852 GitHub stars across 99 public repos, with 48 repositories active in the last 90 days and 722 external contributors on record. OpenAI shows 846,432 stars across 268 public repos, 49 active in the last 90 days and 426 external contributors.

Anthropic is the stronger read for anyone weighting education. OpenAI looks better where momentum is the deciding factor. The table below breaks the scores down pillar by pillar; the linked profiles cover the underlying repos, docs and community signals in full.