anthropic-revoked-openai-api-access-aug2025

IN premise — summaries/2026/08/24/wiki-Claude_language_model-chunk-3.md

Created 2026-08-24T17:11:08+00:00

Anthropic revoked OpenAI's API access to Claude in August 2025, ending a competitive relationship where OpenAI had been an API customer of Anthropic's models.

Summary

OpenAI used to be a paying customer of Anthropic's Claude models, but Anthropic cut that access in August 2025. This matters because it shows the two biggest AI rivals went from having a commercial dependency between them to a fully adversarial, zero-access relationship, which tightens the competitive boundary and removes a quiet channel where each could benefit from the other's work.