OpenAI's API access to Anthropic's models has been revoked due to violations of terms of service, which prohibit using the service to build competing products. Anthropic's spokesperson noted that OpenAI was utilizing Claude Code internally in ways that breached these terms. This occurred as OpenAI prepares for its GPT-5 launch, rumored to enhance coding abilities. OpenAI expressed disappointment over the decision but emphasized that benchmarking against other AI systems is standard practice in the industry.
According to Anthropic's commercial terms of service, customers are barred from using the service to 'build a competing product or service, including to train competing AI models' or 'reverse engineer or duplicate' the services.
OpenAI was plugging Claude into its own internal tools using special developer access (APIs), instead of using the regular chat interface, according to sources.
Hannah Wong stated that 'it's disappointing' that Anthropic cut off OpenAI's API access while their API remains available to Anthropic.
Claude Code has become the go-to choice for coders everywhere, as OpenAI's own technical staff were also using coding tools ahead of the launch of GPT-5.
Collection
[
|
...
]