GPT 5.3 Codex is now on AI Gateway
• 1 min read GPT 5.3 Codex is now available on AI Gateway. • GPT 5.3 Codex brings together the coding strengths of GPT-5.2-Codex and the reasoning depth of GPT-5.2 in a single mode
Codex
Beyond rate limits: scaling access to Codex and Sora
• How OpenAI built a real-time access system combining rate limits, usage tracking, and credits to power continuous access to Sora and Codex.
Custom Kernels for All from Codex and Claude
• Custom Kernels for All from Codex and Claude tl;dr: We built an agent skill that teaches coding agents how to write production CUDA kernels. • Then we pointed Claude and Codex at
OpenAI's new Codex Spark model is built for speed
• We’re so glad you’re here. • You can expect all the best TNS content to arrive Monday through Friday to keep you on top of the news and at the top of your game. • Check
Introducing GPT-5.3-Codex-Spark
• GPT‑5.3‑Codex‑Spark is OpenAI’s first real‑time coding model, providing instant code suggestions during development. • Delivers 15× faster code generation compared to previous Co
Harness engineering: leveraging Codex in an agent-first world
• By Ryan Lopopolo, Member of the Technical Staff
Pick your agent: Use Claude and Codex on Agent HQ
• Share: Context switching equals friction in software development. • Today, we’re removing some of that friction with the latest updates to Agent HQ which lets you run coding agen
Unlocking the Codex harness: how we built the App Server
• Learn how to embed the Codex agent using the Codex App Server, a bidirectional JSON-RPC API powering streaming progress, tool use, approvals, and diffs.