Guillermo Rauch
@rauchg
Processed 1400 replies ◾ OpenAI is catching up to Anthropic ◾ 'Codex' got more mentions than 'Claude Code' ◾ However, by model mentions, A\ is mogging https://t.co/BjtqVGmlUg
10retweets248likes
View on XGuillermo Rauch Finds OpenAI Codex Gaining Ground on Claude Code
Vercel· Updated
Vercel CEO Guillermo Rauch analyzed 1,400 developer projects to reveal that OpenAI's Codex is now rivaling Anthropic's Claude Code in tool mentions. While Anthropic still leads in overall model preference, the data suggests OpenAI's aggressive push into agentic workflows is successfully capturing builder mindshare.
Guillermo Rauch, CEO of Vercel, a frontend cloud platform, analyzed 1,400 developer responses to identify which AI models and agents power shipped products. The findings show OpenAI is narrowing the gap with Anthropic. Specifically, the Codex agentic coding tool received more mentions than Claude Code.
This shift follows the OpenAI Codex migration feature designed to pull developer workflows away from rival platforms. While Anthropic's Claude Code established an early lead, Rauch's data indicates OpenAI's ecosystem strategy is converting users. However, Anthropic still leads in raw model mentions, maintaining dominance in the underlying model layer even as tool competition intensifies.
Guillermo Rauch's analysis reveals a fragmented stack where developers mix providers, using Claude Opus for scripting and Gemini for classification. This multi-model approach validates Cursor's findings that better models drive more ambitious work as builders increasingly orchestrate specialized agents rather than relying on a single provider.
Every HeadsUpAI update is written based on its original source and reviewed before it's published. Read our editorial standards →
