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AFAIK, they are the least open of the major AI labs. Meta is open-weights and partly open-source. Google DeepMind is mostly closed-weights, but has released a few open models like Gemma. Anthropic's models are fully closed, but they've released their system prompts, safety evals, and have published a fair bit of research (https://www.anthropic.com/research). Anthropic also haven't "released" anything (Sora, GPT-4o realtime) without making it available to customers. All of these groups also have free-usage tiers.
sure but also none of that publicly existed when openai was named
> literally anyone can use it for free, you don't even need an account
how can you access it without an account?
Also, what is going to be their excuse to defend themselves against copyright lawsuits if they are going to "understandably" keep their models closed?