gpt-5.3-codex opus-4.6 openai anthropic nvidia agentic-coding long-context token-efficiency inference-speed hardware-software-co-design agent-platforms benchmarking software-development compiler-construction
OpenAI launched GPT-5.3-Codex, emphasizing token efficiency, inference speed, and hardware/software co-design with GB200-NVL72 and NVIDIA collaboration. The new Frontier agent platform supports business-context agents with execution environments and learning capabilities. Anthropic showcased Opus 4.6 agent teams autonomously building a clean-room C compiler booting Linux, highlighting advances in agentic coding and long-context capabilities. Community benchmarks report 2.93× faster inference and significant efficiency gains, signaling a shift away from infinite compute budgets in 2026.