GPT-5.5 is OpenAI’s most intelligent model in Cursor. It keeps momentum on long-running work and stays on task for significantly longer before stopping early, which matters most in complex, multi-step coding sessions.

Strengths

  • Highest overall intelligence in the GPT-5 family for challenging coding and reasoning tasks.
  • More persistent on long-running work; it keeps digging instead of ending early when tasks are still incomplete.
  • Strong at maintaining context and execution quality across larger, multi-step workflows.
  • More token-efficient than GPT-5.4 on complex, long-running tasks, which helps reduce total token usage for the same outcomes.

Limitations

  • Higher per-token pricing than GPT-5.3 Codex.
  • Throughput can be lower on straightforward tasks where smaller models are already enough.

Tools

GPT-5.5 has access to all agent tools when used with Cursor including:

Learn more about how tools work and tool calling fundamentals.

Pricing

Cursor plans include two usage pools. GPT-5.5 draws from the third-party Other Models pool, which charges at the rates below. All prices are per million tokens.

A Fast mode tier (gpt-5.5-fast) is available for priority processing. It has higher per-token pricing than standard mode.

GPT-5.5 uses the same cache discount, regional endpoint pricing, and long-context pricing behavior as GPT-5.4. When input exceeds 272k tokens (long context), input pricing doubles and output pricing is 1.5x the standard rate.