GPT-5.5
OpenAI's most capable frontier model. Built for the most complex professional work: omnimodal, genuinely long-context reliable, and designed for autonomous agentic tasks.
General capability, applied to your work
GPT-5.5 handles the full range of complex tasks with reliable, precise output.
Omnimodal, Genuinely Long Context
Processes text, images, audio, and video in a unified architecture. The context window holds reliably past 256K and all the way to 1M tokens — 74% retention at 512K vs. 36.6% for the previous version.
Agentic Capability
Understands tasks earlier, asks for less guidance, uses tools more effectively, and keeps going until the job is done. 78.7% on OSWorld desktop automation, leading all models on the Artificial Analysis Intelligence Index.
Efficient Frontier Code
Uses 40% fewer output tokens than its predecessor for equivalent Codex tasks. Leads Terminal-Bench 2.0 with 82.7% accuracy on command-line and agentic developer workflows.
Scientific and Research Frontier
Scientific capabilities strong enough to meaningfully accelerate progress at the frontiers of biomedical research. 51.7% on FrontierMath Tiers 1-3, 85.0% on ARC-AGI-2.
What you can ask GPT-5.5 to do
GPT-5.5 handles work that spans multiple domains and requires precise instruction following.
- Research a biomedical topic across academic sources and synthesize findings
- Build and execute an autonomous desktop workflow end to end
- Process and analyze a 500K-token document corpus
- Write, debug, and deploy code via a terminal-based agent workflow
- Produce a professional investment-banking model from uploaded financials
- Run a multi-source research task requiring persistent web navigation
- Generate a technical specification from a product brief
- Analyze a competitor product and write a structured market brief
All models available on Kuse
Switch models mid-conversation. Each model stays in your workspace history.
| Model | Best For | Speed | Cost |
|---|---|---|---|
| Claude Opus | Deep analysis, high-stakes documents, complex code | Moderate | $$$ |
| Claude Sonnet | Everyday tasks, fast drafts, most workflows | Fast | $$ |
| GPT-5.5 | General purpose, strong reasoning and coding | Fast | $$$ |
| GPT-4.5 | Code generation, review, and debugging | Fast | $$ |
| Gemini Pro | Multimodal tasks, Google Workspace integration | Fast | $$ |
| Gemini Flash | Quick replies, simple tasks, budget-conscious use | Very fast | $ |