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    <title>Codex on Tenu Tech Brief</title>
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    <description>Recent content in Codex on Tenu Tech Brief</description>
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      <title>GPT 5.3 Codex is now on AI Gateway</title>
      <link>https://cluster-site.onrender.com/posts/gpt-5.3-codex-is-now-on-ai-gateway/</link>
      <pubDate>Wed, 25 Feb 2026 06:41:54 +0000</pubDate>
      <guid>https://cluster-site.onrender.com/posts/gpt-5.3-codex-is-now-on-ai-gateway/</guid>
      <description>• 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</description>
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      <title>Beyond rate limits: scaling access to Codex and Sora</title>
      <link>https://cluster-site.onrender.com/posts/beyond-rate-limits-scaling-access-to-codex-and-sora/</link>
      <pubDate>Fri, 13 Feb 2026 09:00:00 +0000</pubDate>
      <guid>https://cluster-site.onrender.com/posts/beyond-rate-limits-scaling-access-to-codex-and-sora/</guid>
      <description>• How OpenAI built a real-time access system combining rate limits, usage tracking, and credits to power continuous access to Sora and Codex.</description>
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      <title>Custom Kernels for All from Codex and Claude</title>
      <link>https://cluster-site.onrender.com/posts/custom-kernels-for-all-from-codex-and-claude/</link>
      <pubDate>Fri, 13 Feb 2026 00:00:00 +0000</pubDate>
      <guid>https://cluster-site.onrender.com/posts/custom-kernels-for-all-from-codex-and-claude/</guid>
      <description>• 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</description>
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      <title>OpenAI&#39;s new Codex Spark model is built for speed</title>
      <link>https://cluster-site.onrender.com/posts/openais-new-codex-spark-model-is-built-for-speed/</link>
      <pubDate>Thu, 12 Feb 2026 18:00:47 +0000</pubDate>
      <guid>https://cluster-site.onrender.com/posts/openais-new-codex-spark-model-is-built-for-speed/</guid>
      <description>• We&amp;rsquo;re so glad you&amp;rsquo;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</description>
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    <item>
      <title>Introducing GPT-5.3-Codex-Spark</title>
      <link>https://cluster-site.onrender.com/posts/introducing-gpt-5.3-codex-spark/</link>
      <pubDate>Thu, 12 Feb 2026 10:00:00 +0000</pubDate>
      <guid>https://cluster-site.onrender.com/posts/introducing-gpt-5.3-codex-spark/</guid>
      <description>• GPT‑5.3‑Codex‑Spark is OpenAI&amp;rsquo;s first real‑time coding model, providing instant code suggestions during development. • Delivers 15× faster code generation compared to previous Co</description>
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      <title>Harness engineering: leveraging Codex in an agent-first world</title>
      <link>https://cluster-site.onrender.com/posts/harness-engineering-leveraging-codex-in-an-agent-first-world/</link>
      <pubDate>Wed, 11 Feb 2026 09:00:00 +0000</pubDate>
      <guid>https://cluster-site.onrender.com/posts/harness-engineering-leveraging-codex-in-an-agent-first-world/</guid>
      <description>• By Ryan Lopopolo, Member of the Technical Staff</description>
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      <title>Pick your agent: Use Claude and Codex on Agent HQ</title>
      <link>https://cluster-site.onrender.com/posts/pick-your-agent-use-claude-and-codex-on-agent-hq/</link>
      <pubDate>Wed, 04 Feb 2026 17:00:19 +0000</pubDate>
      <guid>https://cluster-site.onrender.com/posts/pick-your-agent-use-claude-and-codex-on-agent-hq/</guid>
      <description>• Share: Context switching equals friction in software development. • Today, we&amp;rsquo;re removing some of that friction with the latest updates to Agent HQ which lets you run coding agen</description>
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    <item>
      <title>Unlocking the Codex harness: how we built the App Server</title>
      <link>https://cluster-site.onrender.com/posts/unlocking-the-codex-harness-how-we-built-the-app-server/</link>
      <pubDate>Wed, 04 Feb 2026 13:00:00 +0000</pubDate>
      <guid>https://cluster-site.onrender.com/posts/unlocking-the-codex-harness-how-we-built-the-app-server/</guid>
      <description>• 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.</description>
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