ChatGPT 5.5 ⌄
ChatGPT 5.5 ⌄

Chat with ChatGPT 5.5

Powered by OpenAI.

This is an earlier model. ChatGPT 5.6 Sol is the current OpenAI model and is faster and more capable. Try ChatGPT 5.6 Sol →
Hardest reasoning task Plan, then solve
Deep code review Bugs & architecture
Rigorous research Evidence-based report
Long-form writing Holds tone & structure

GPT-5.5 is OpenAI's newest flagship: stronger reasoning, sharper instruction-following and more reliable long-form output than GPT-5.

What ChatGPT 5.5 is best for

  • The hardest multi-step reasoning and planning tasks
  • Long research documents, reports and technical writing
  • Advanced code generation, debugging and architecture review
  • Careful analysis where accuracy matters more than speed
  • Creative work that must hold tone and structure over long outputs

How to use ChatGPT 5.5

Step 1 Bring GPT-5.5 the whole problem: full background, goal and constraints in one message - the newest flagship reasons best when it sees everything at once.
Step 2 Ask it to plan before it answers: have it outline the approach, flag assumptions and weigh tradeoffs, then execute the plan in the same conversation.
Step 3 Use follow-ups to stress-test conclusions, ask for a more rigorous pass, or turn the analysis into a finished long-form deliverable.

Example prompts

Unlimited ChatGPT 5.5, free for 7 days

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Frequently asked questions

Is ChatGPT 5.5 really free here?

Your first question is free with no signup. Free accounts get a monthly allowance; Pro plans unlock higher limits and priority access.

What's new in GPT-5.5 vs GPT-5?

GPT-5.5 is OpenAI's latest flagship release with measurably better reasoning, fewer factual slips, and more faithful instruction-following than GPT-5.

Should I use GPT-5.5 or GPT-5?

Use GPT-5.5 for your hardest and most important tasks. GPT-5 remains a strong choice and both are available in your sidebar.

Can ChatGPT 5.5 browse the web?

Not on this platform. For real-time web search, switch to one of the Perplexity search models in your sidebar.

Related tools and comparisons

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