This a big exaggeration. Codex is probably one of the top two LLM programming tools, along with Claude Code. GPT-5.4 models are strong, unlike the initial GPT-5 ones, which were comparatively bad, and can hold up against Opus 4.6. In my experience, they are better at analytical work.
I cannot really see how they are "far behind," or how some plugin for Claude Code is a "last desperate bid." The tools are close enough to each other that I regularly use Codex one month and Claude Code the next without much disruption, just to try out any new models or features that might be available.
I do not have much visibility into the non-code applications, so maybe it is stickier there.
If/when the AI bubble pops and takes OpenAI down with it, I would not expect Anthropic to come out unscathed either.
They were years ahead. They managed to generate competitors (Anthropic is OpenAI refugees) by alienating their own employees by being so dishonest and immoral when compared to their own founding principals and even legal documents. They experienced a coup where the primary technical vision of the company was forced out in favor of someone who is comparatively a nontechnical dummy. That was the beginning of the multiple years of stagnation while they burned tens and hundreds of billions of dollars while their competitors caught up and then passed them by.
OpenAI is floundering and can't sustain their own burn rate. Their competitors are thriving. This is a market and technology that OpenAI largely created and just a few years in they are behind, losing unprecedented amounts of money, and have no clear path to catch up.
Lets be totally clear, they were 3 years ahead 3 years ago and now they are behind. They are literally standing still.