GPTGenerative Pre-trained Transformer — OpenAI's family of large language models from GPT-1 through GPT-5.-5.2 answered Google's GeminiGoogle's family of multimodal AI models — successors to PaLM and competitors to GPT and Claude. 3 launch with improved Thinking mode and enterprise knowledge-work benchmarks. It set the baseline that GPTGenerative Pre-trained Transformer — OpenAI's family of large language models from GPT-1 through GPT-5.-5.3-Codex and GPTGenerative Pre-trained Transformer — OpenAI's family of large language models from GPT-1 through GPT-5.-5.4 would extend in 2026 — closing OpenAIAn AI research company — created GPT, ChatGPT, DALL-E, and the o-series reasoning models.'s competitive gap after a busy November for Google and AnthropicAn AI safety company — creators of the Claude family of language models..

GPTGenerative Pre-trained Transformer — OpenAI's family of large language models from GPT-1 through GPT-5.-5.2 was OpenAIAn AI research company — created GPT, ChatGPT, DALL-E, and the o-series reasoning models.'s year-end response to GeminiGoogle's family of multimodal AI models — successors to PaLM and competitors to GPT and Claude. 3 and Claude Opus 4.5.

Lower hallucination rates and Codex integration kept OpenAIAn AI research company — created GPT, ChatGPT, DALL-E, and the o-series reasoning models. in the three-way frontier race.