OpenAI is preparing to introduce the GPT-5.1 series to the public. This lineup includes GPT-5.1 (base), GPT-5.1 Reasoning, and GPT-5.1 Pro, available to subscribers paying $200 monthly.According to tech sources, the new GPT-5.1 models will soon be available on Azure, suggesting the rollout is just a few weeks away, in line with GPT’s usual release schedule.GPT-5 was launched on August 7, and OpenAI generally releases a new model every three to four months. While GPT-5.1 may not be a major upgrade over GPT-5, we anticipate improvements in health-related safeguards and faster performance.Recently, OpenAI also introduced a new Codex model called ‘codex-mini-high.’OpenAI has introduced GPT -5 Codex Mini, a new, cost-efficient model. This version maintains performance levels comparable to the original Codex High but is designed for cost-effectiveness and provides a 50% increase in rate limits.According to OpenAI, GPT-5-Codex-Mini is best suited for simpler tasks or for users who need to extend their usage when nearing rate limits.A new feature has been implemented where the Codex model will automatically suggest switching to Codex-Mini when a user reaches 90% of their rate limit, allowing for continued work without interruption.OpenAI announced that “GPT-5-Codex-Mini allows for approximately four times more usage than GPT-5-Codex, although this comes with a slight tradeoff in capability due to the more compact model.”As a result, ChatGPT Plus, Business, and Education users enjoy a 50% increase in rate limits, while Pro and Enterprise accounts receive priority processing for faster performance.Additionally, GPT-5.1 may introduce new performance enhancements for Codex. However, OpenAI is not alone in developing new models; Google is also testing Gemini 3 Pro, and there are reports of a new Claude model being created.