At a Glance · AI-generated

OpenAI released multiple iterations of its GPT-5 model series throughout 2025, beginning with GPT-5.1 in November, followed by specialized variants including GPT-5.1-Codex-Max and GPT-5.2 in December. The company continued expanding the lineup in February 2025 with GPT-5.3-Codex and GPT-5.3-Codex-Spark models focused on coding capabilities. OpenAI published accompanying system cards detailing safety and performance characteristics for each release. By late January 2026, the company retired several older models including GPT-4o and GPT-4.1 variants from ChatGPT.