GPT-5.5 in 7 Minutes: Benchmarks, Codex Agents, Context Window, and Pricing
TL;DR
A companion guide to the GPT-5.5 video: OpenAI's newly released model rolling out to ChatGPT and Codex, reviewed through benchmarks, agent capabilities, context window, and pricing.
Official Sources#
| Resource | Description |
|---|---|
| Watch: GPT-5.5 in 7 Minutes | The full walkthrough on the DevDigest channel |
| OpenAI | Official site for ChatGPT and Codex |
What This Video Covers#
GPT-5.5 in 7 Minutes reviews OpenAI's newly released GPT-5.5, now rolling out to ChatGPT and Codex and positioned as a new class of model. The video works through benchmarks, its behavior as a Codex agent, the context window, and pricing.
This post is a companion to the video above. Watch the seven-minute review for the numbers and the demo, then use the links here to place GPT-5.5 in context.
The Idea in One Line#
GPT-5.5 is OpenAI's next step across both ChatGPT and Codex. The interesting framing is that it lands in the coding agent, not just the chat product, so the benchmarks and pricing matter to anyone building with Codex.
Why It Matters#
Four things the video weighs are worth your attention:
- Benchmarks set the baseline. New release, new scores. The GPT-5.5 developer guide puts the numbers next to what you can actually do with them.
- Codex agents are the real test. A model that runs inside Codex gets judged on agentic coding, not just single answers. GPT-5.5 in Codex production looks at how it holds up on real work.
- Context window changes scope. How much the model can hold at once decides which tasks are even feasible.
- Pricing decides adoption. The cost per token is what turns a benchmark win into a practical choice.
Where It Fits#
GPT-5.5 arrives into a competitive field. GPT-5.5 versus Claude Opus 4.8 compares it against Anthropic's flagship, while Fable 5 versus GPT-5.5 and the GPT-5.5 hallucination benchmark against GLM 5.2 place it next to other recent releases. The comparisons are where a spec sheet turns into a decision.
Getting Started#
The path the video points to is to try GPT-5.5 where you already work, whether that is ChatGPT or Codex, and judge it on tasks you understand well. Start with something you can grade yourself so the benchmarks become real numbers for your own workflow.
Watch the full GPT-5.5 in 7 Minutes review above, then run the model on a task of your own and see whether the new release earns the switch.
FAQ#
Does GPT-5.5 work in Codex, or only ChatGPT?#
Both. GPT-5.5 rolls out across ChatGPT and Codex, and the video specifically covers its behavior as a Codex agent. See GPT-5.5 in Codex production for a closer look at how it performs on real agentic coding work.
How does GPT-5.5 compare to Claude Opus 4.8?#
The video and the GPT-5.5 versus Claude Opus 4.8 comparison walk through the benchmark gaps and pricing tradeoffs between the two models side by side.
Is GPT-5.5 worth switching to?#
That depends on your workload. The video's advice is to test GPT-5.5 on a task you already understand well rather than trusting benchmarks alone, then compare the result against whatever model you currently use.
Where can I read more about GPT-5.5 for development work?#
The GPT-5.5 developer guide covers setup and practical usage in more depth than this companion post.
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