OpenAI launches new agentic coding model only minutes after Anthropic drops its own
SMRTR summary
OpenAI released GPT-5.3 Codex, an advanced coding model that can build complex games and apps from scratch over several days, transforming developers' capabilities beyond simple code writing and review. The model is 25% faster than its predecessor and notably helped create itself through self-debugging processes. This launch came just minutes after competitor Anthropic released its own coding tool, with Anthropic moving up their announcement by 15 minutes to beat OpenAI's planned release time.
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