OpenAI's Codex Poised for Unprecedented Compute Scaling by 2026!
Analysis
Key Takeaways
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“Sam Altman tweeted “very fast Codex coming” shortly after OpenAI announced its partnership with Cerebras.”
“Sam Altman confirms faster Codex is coming, following OpenAI’s recent multi billion dollar partnership with Cerebras.”
“The article references a previous article that described how switching to Skills dramatically improved the user experience.”
“OpenAI has announced that its most advanced agent-based programming model to date, GPT-5.2-Codex, is now officially open for API access to developers.”
“I switched to Codex 5.2 (High Thinking). It fixed all three bugs in one shot.”
“I was mainly using Claude Code (Pro / $20) because the 'autonomous agent' experience of reading a project from the terminal, modifying it, and running it was very convenient.”
“I once paid $200 for ChatGPT Pro, but this real-world debugging story proves Codex 5.2 on the Plus plan does the job just fine.”
“The application's code was entirely implemented using AI coding agents. Specifically, the development progressed by leveraging Claude Code, ChatGPT's Codex CLI, and Gemini (Antigravity).”
“One of the biggest differences between Claude Code, GitHub Copilot and Codex is that 'the commands that Codex generates and executes are, in principle, operated under the constraints of sandbox_mode.'”
“I often have Claude Code or Codex look at the zzz line of xxx.md, but it was a bit cumbersome to check the target line and filename on NeoVim and paste them into the console.”
“N/A (Article lacks direct quotes)”
“SSH接続先のサーバーでOpenAIのCLIツール「Codex」を使おうとすると、「ブラウザで認証してください」と言われて困りました。”
“とりあえずは「ほぼ」デフォルト設定のまま実行しました。”
“はじめに ※ 本記事はmacOS環境を前提としています(terminal-notifierを使用します)”
““This happened last time too. OpenAI gate keeps the codex model in codex cli and paying API users that want to implement in their own clients have to wait. What's the issue here? When is gpt-5.2-codex-max going to be made available via API?””
“AI(Codex / ChatGPT)のお陰もあり、スムーズに開発を進めることができました。”
“The problem: Every new Codex session starts fresh. You end up re-explaining your codebase, conventions, and architectural decisions over and over.”
“Gemini 3 Pro performed the best. It set up the fallback and cache effectively, with repeated generations returning in milliseconds from the cache. The run cost $0.45, took 7 minutes and 14 seconds, and used about 746K input (including cache reads) + ~11K output.”
“Claude Code の plan mode は、計画フェーズ中に Plan subagent へ調査を委任し、探索を差し込む仕組みを持つ。”
“Codex cloud is now called Codex web”
“The article's summary focuses on using mounts within Dev Container Features to persist authentication for LLMs like Claude and Codex, addressing the problem of repeated logins during container rebuilds.”
“The article's introduction highlights the need for remote access due to the waiting times associated with AI CLI tools, such as Claude Code and Codex CLI. It mentions scenarios like wanting to check progress while away or run other tasks during the wait.”
“最初にそのログを見たとき、私は「これはまさにインターンに教えていることと同じだ」と感じました。”
“The killer feature is council_ask - it queries Codex, Gemini, and OpenCode in parallel, then optionally runs a second round where each agent sees the others' answers and revises (or critiques) their response.”
“Is anyone seriously using GLM 4.5 Air locally for agentic coding (e.g., having it reliably do 10 to 50 tool calls in a single agent round) and has some hints regarding well-working coding TUIs?”
“This year has been a fun year thanks to AI coding agents.”
“Google Gemini CLI v0.22.0 〜 v0.22.4 Release Dates: 2025-12-22 〜 2025-12-27. This week's Gemini CLI added five enterprise features, including A2A server, persistent permission policies, and IDE integration.”
“"AI reviews are suggestions..."”
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“Strategy: There are limits to internal promotion → Create a topic at external events and reverse flow it into the company.”
“本稿は 現状共有編の続編 です。”
“N/A (Article is too brief to extract a meaningful quote)”
“When you start using Claude Code or Codex Agent, managing configuration files and MCP servers becomes complicated.”
“AI agent, copilot, claudecode, codex…etc. I feel that the development experience is clearly changing every day.”
“claude mcp add codex-mcp codex mcp-server が上手くいかなかった理由”
“"GPT‑5.2-Codex は、GPT‑5.2 を Codex におけるエージェント活用型コーディング向けにさらに最適化したバージョンです。コンテキスト圧縮による長期的な作業への対応強化、リファクタリングや移行といった大規模なコード変更での性能向上、Windows 環境でのパフォーマンス改善、そしてサイバーセキュリティ機能の大幅..."”
“Mysti leverages Claude, Codex, and Gemini.”
“文脈が途中で途切れていることが原因です。(The cause is that the context is interrupted midway.)”
“GPT‑5.2-Codex is a version of GPT‑5.2 further optimized for agentic coding in Codex, including improvements on long-horizon work through context compaction, stronger performance on large code changes like refactors and migrations, improved performance in Windows environments, and significantly stronger cybersecurity capabilities.”
“OpenAI introduced GPT-5.2-Codex in 2025 as an agentic coding model for enterprise refactors, terminal-based workflows, and defensive cybersecurity research.”
“GPT-5.2-Codex is OpenAI’s most advanced coding model, offering long-horizon reasoning, large-scale code transformations, and enhanced cybersecurity capabilities.”
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“OpenAI shipped Sora for Android in 28 days using Codex. AI-assisted planning, translation, and parallel coding workflows helped a nimble team deliver rapid, reliable development.”
“Open sourcing AI models fosters innovation and collaboration within the AI community.”
“It's a big week! Lots of exciting releases, plus nvidia earnings and a whole bunch of cool research.”
“The author built a sentiment dashboard using data from Reddit comments.”
“It’s the best time in history to be a builder.”
“The article title suggests a comparison in AI research capabilities.”
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