OpenAI has reduced pricing for GPT-5.6 Sol across both API usage and overage credits for the next three months, with the API-side changes already in effect. The biggest cut hit output tokens, which dropped from $30 to $20 per million tokens, while input pricing moved from $5 to $4. Subscription tiers including Pro, Plus, and Business were left unchanged, and included usage was not increased. Cache pricing and long-context pricing were also lowered. The move lands as competition around flagship AI models shifts beyond benchmark performance and into pricing. The original report framed the cut as pressure on Anthropic, which is reportedly in its IPO preparation window, while also pointing to low-cost competition from newer models such as DeepSeek V4 Flash and a model referred to as Ox Alpha. At the same time, OpenAI linked the lower prices to efficiency gains in how Sol now runs. Separately, Codex lead Tibo said Codex weekly active users have passed 20 million. He also said the team has launched a formal investigation into user complaints about fast quota depletion, even though no anomaly has yet been found, and warned that converting subscription accounts into API traffic for resale or shared access is not supported.

OpenAI said it will not change Codex usage limits without first discussing the issue with the community. In its response, the company said its investigation found that some affected users were using sub2api to convert subscriptions into API traffic and redistribute that traffic, which caused those accounts to be flagged by fraud-prevention systems. OpenAI also said normal subscription use through Sign in With ChatGPT remains fine when users access official clients or open-source clients such as Pi and OpenCode. The response did not announce a policy change, only the company’s explanation of why the usage-limit difference appeared and which usage patterns were flagged.