Developer Briefing — OpenAI releases GPT-4
OpenAI launched GPT-4 on 14 March 2023, introducing a multimodal model with stronger reasoning performance, broader context handling, and new safety mitigations compared to GPT-3.5.
On 14 March 2023 OpenAI announced GPT-4, a large multimodal model that accepts image and text inputs and delivers significantly improved reasoning and steering performance over GPT-3.5. The release included updated API access, a system message for tighter instruction control, and reinforced safety mitigations informed by adversarial testing and alignment research.
Developers can access GPT-4 via the Chat Completions API with higher pricing tiers and rate limits, enabling more reliable tool integrations and agentic workflows. Teams should evaluate prompt isolation, output validation, and monitoring to manage cost and safety tradeoffs when upgrading from earlier GPT models.
- OpenAI research blog details model capabilities, evaluation results, and safety approach.
- OpenAI product page outlines API access, pricing, and platform availability.
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