GPT-5.5 Pro vs GPT-5.5

Side-by-side comparison. Updated 2026-06-04.

Verdict

GPT-5.5 Pro wins on higher overall score (9.5 vs 9.4, +0.1).

  • Larger context window (1050k vs 128k)
GPT-5.5 Pro
by OpenAI
9.5 /10 Elite
Full review →
GPT-5.5
by OpenAI
9.4 /10 Elite
Full review →

At a Glance

Side-by-side comparison of GPT-5.5 Pro and GPT-5.5
Attribute GPT-5.5 Pro GPT-5.5
Provider OpenAI OpenAI
Tags Reasoning general
Context 1,050,000 tokens 128,000 tokens
Input price $30.00/1M $12.50/1M
Output price $50.00/1M $50.00/1M
Input modalities Text Text
Output modalities Text Text

GPT-5.5 Pro Strengths

GPT-5.5 Strengths

  • Deeper reasoning than GPT-5 on complex professional tasks
  • Improved token efficiency on hard problems
  • Higher reliability and consistency than GPT-5
  • 1M+ token context window via ChatGPT
  • Available via API and ChatGPT consumer interface
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