
Codex CLI, running entirely on open models. No OpenAI API. Web search working. Multi-turn state intact. @franciscojarceo shows how vLLM Agentic API bridges the gap: Codex connects to the Agentic API, which forwards prompts and tools to vLLM, executes tool calls server-side (web search with zero data retention), and streams the final answer back. State rehydration via previous response ID means each follow-up only sends the new prompt, not the full context, which matters for prefix caching as conversations grow. The demo makes the point cleanly. Without web search, the model answers from its 2025 training cutoff and has no answer on GPT-5. With web search enabled, it finds July 2026 results with citations. The project is starting with Codex and the Responses API and expanding tool calling for broader agentic harness support. If you want @vllm_project to be the inference layer for your agents, this is the video to check out!











