Archive · 3 Aug 2025
Anthropic Blocks OpenAI’s API Access to Claude Amid AI Rivalry
Imagine two AI companies, Anthropic and OpenAI, are rivals.
Anthropic found OpenAI was using its Claude AI coding tool in ways that broke the rules.
Because of this, Anthropic is limiting OpenAI's access to Claude, especially now that OpenAI is releasing its new AI model, GPT-5.
OpenAI says it needs access to check other AI models, but Anthropic disagrees, just like when a company blocked another one from using its tools because they thought the second company would compete with them.
Anthropic restricted OpenAI's API access to its Claude AI models.
Anthropic accused OpenAI of violating terms of service by using Claude Code improperly.
The restriction comes before the expected launch of OpenAI's GPT-5, which is strong at coding.
OpenAI stated it was industry standard to use other AI for benchmarking and safety.
Anthropic previously restricted access to Windsurf after reports of OpenAI's acquisition interest.
- Who
- Anthropic and OpenAI.
- What
- Anthropic has restricted OpenAI's API access to its Claude AI models due to alleged terms of service violations.
- When
- Recent developments, before the launch of OpenAI's GPT-5.
- Where
- Focus on the tech industry and AI companies.
- Why
- Anthropic alleges OpenAI violated its terms of service and may have been using the coding tool to build a competing product.
Anthropic's Stance
OpenAI's Perspective
Terms of Service vs. Industry Standards
Anthropic's Stance
OpenAI violated terms of service by using Claude Code for potentially competing purposes.
OpenAI's Perspective
OpenAI claims its actions are standard practice for benchmarking and improving safety.
- Company Blocking Access
- Anthropic
- Company Affected
- OpenAI
- AI Model Involved
- Claude Code (Anthropic)
- Alleged Violation
- Terms of Service
- OpenAI Response
- Disappointment, industry standard practices
