Build with GPT 5.5 on Atoms

GPT 5.5 is accessible through Atoms for users on the platform. OpenAI has noted that GPT 5.5 is not available to free-tier ChatGPT users, but on Atoms you can access GPT 5.5 as part of the model options available for building and deploying apps.

GPT 5.5 scores 82.7% on Terminal-Bench 2.0, ahead of Claude Opus 4.7 at 69.4% and Gemini 3.1 Pro at 68.5%. It also uses about 40% fewer output tokens per task. However, Opus 4.7 still leads on SWE-Bench Pro at 64.3% vs 58.6%, so results vary by task type. Atoms' Race Mode lets you compare directly.

Yes. Atoms supports full code export and GitHub sync. Every app generated with GPT 5.5 produces standard, readable code that you own completely. You can clone it, modify it in any IDE, or hand it to your development team — there is no vendor lock-in.

You can build websites, web apps, SaaS products, dashboards, marketplaces, and landing pages. Atoms provides built-in authentication, database, Stripe payments, and hosting. GPT 5.5's strong multi-file context handling means it can generate complete full-stack applications from natural language descriptions.

Atoms supports multilingual natural language input, so you can describe your product in your preferred language and GPT 5.5 will generate the corresponding application. This applies to prompts, select-to-edit instructions, and iterative refinement throughout the build process.

According to OpenAI, GPT 5.5 matches GPT 5.4's per-token latency while delivering higher intelligence and using roughly 40% fewer output tokens per task. On Atoms, this translates to faster app generation cycles and quicker iteration when refining your product through select-to-edit or prompt-based changes.