September model releases compared: GPT-6, DeepSeek V4.1 pricing and speed

A post published by DEV Community in its AI section on October 3, 2026, titled "GPT-6, DeepSeek V4.1 and other new models: price and speed compared," walks through the cluster of model launches in September 2026 and sets their pricing and speed side by side.

According to the article, Anthropic opened the run on September 1, 2026, with Claude Fable 5.1. Two days later, on September 3, OpenAI showed off GPT-6 Astra. On September 10, DeepSeek released V4.1 Flash. The piece describes the fall of 2026 as the most crowded stretch in the history of this race, with models from four labs landing inside four weeks. The material available, however, names only three of those labs and only the three models above, each with its own date.

Beyond the release calendar, the comparison centers on what each vendor charges and how fast the models are. The article's caution is that the figures vendors publish should be discounted rather than taken at face value: advertising tables alone no longer make it possible to choose among the models, and they do not show how quickly a model actually solves tasks. The material stops there — it offers no specific price points, no speed measurements and no later developments.