GPT-5.1-Codex-Max: Building Infinite Possibilities
🚀 Building More with GPT‑5.1‑Codex‑Max
Read the official announcement (discussion on Hacker News) — Hot on the heels of yesterday’s Gemini 3 Pro release, OpenAI has introduced a new model: GPT‑5.1‑Codex‑Max.
> Remember when GPT‑5 promised simpler, less confusing model names? That didn’t last!
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📦 Availability and Use
- Currently available only through the Codex CLI coding agent
- Has already become the default Codex model
- Not yet accessible via API — expected to come soon
Quoted from OpenAI's announcement:
> Starting today, GPT‑5.1‑Codex‑Max will replace GPT‑5.1‑Codex as the default model in Codex surfaces.
> Unlike GPT‑5.1, which is a general‑purpose model, we recommend using GPT‑5.1‑Codex‑Max (and the Codex family) solely for agentic coding tasks in Codex or Codex‑like environments.
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📊 Benchmark Performance
Release timing is notable — Gemini 3 Pro dominated benchmarks yesterday. This echoes 2024’s pattern of OpenAI releases coinciding with Gemini launches.
SWE‑Bench Verified
- 76.5% (high reasoning)
- 77.9% (xhigh category)
- Previously: Gemini 3 Pro 76.2%, Claude Sonnet 4.5 77.2%
- OpenAI now leads — margin: +0.7%
Terminal Bench 2.0
- 58.1% — beats Gemini 3 Pro (54.2%) and Sonnet 4.5 (42.8%)
- Leaderboard here
These gains strengthen GPT‑5.1‑Codex‑Max’s case for high‑complexity programming tasks, especially in agentic or automated development workflows.
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🌍 Distribution and Monetization Synergy
Developers can pair this model’s capabilities with AiToEarn官网 — an open‑source framework allowing:
- Simultaneous publishing to Douyin, Kwai, WeChat, Bilibili, Rednote, Facebook, Instagram, LinkedIn, Threads, YouTube, Pinterest, and X (Twitter)
- Integration with AI generation, multi‑platform analytics, and AI模型排名
- Efficient workflows for global reach and monetization
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🧠 Long‑Context & “Compaction” Innovation
The most intriguing technical feature is Codex‑Max’s multi‑window compaction:
> GPT‑5.1‑Codex‑Max is designed for extended, detailed work. It’s our first model natively trained to function across multiple context windows using a process called compaction, enabling coherent operation over millions of tokens in a single task.
> Compaction prunes history while preserving crucial context over long spans. In Codex applications, GPT‑5.1‑Codex‑Max automatically compacts sessions near the context limit, providing a fresh window until completion.
This echoes Claude Code’s automatic turn summarization but may represent a more advanced implementation.
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🎨 Quick Visual Test
I tested Codex‑Max via the Codex CLI:
- Prompt: `"Generate an SVG of a pelican riding a bicycle."`
- Thinking level: medium
- Thinking level: xhigh
- Longer pelican benchmark prompt (link here):
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💡 Potential for Large‑Scale Creative/Technical Projects
Combining multi‑window compaction with AiToEarn’s distribution capabilities could enable:
- Sustained, coherent long‑form output
- Simultaneous cross‑platform publishing
- Scalable monetization
Explore:
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⚡ Related News: GPT‑5.1 Pro Rollout
Also today: GPT‑5.1 Pro is available to all ChatGPT Pro users.
From the release notes:
> GPT‑5.1 Pro is rolling out today for all ChatGPT Pro users and is available in the model picker.
> GPT‑5 Pro will remain available as a legacy model for 90 days before retirement.
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📌 Takeaway for Creators & Developers
- Version turnover is fast — GPT‑5 Pro lasted just 3 months
- Flexible workflows and multi‑channel distribution are critical
- Platforms like AiToEarn help quickly integrate new models, publish across channels, and track performance
The bottom line: GPT‑5.1‑Codex‑Max offers both top‑tier benchmark results and a long‑context advantage that could reshape how complex coding agents and sustained creative projects are built and distributed.
