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Head-to-head
GPT-5.5 vs Gemini 2.5 Pro
GPT-5.5 wins+2.8 pts (+3%)on the balanced composite.
Category-by-category
Higher bar wins each row.
GPT-5.5
Category
Gemini 2.5 Pro
+6.691.0
Code
84.4-6.6
+2.790.4
Reason
87.7-2.7
+4.588.6
Tool Use
84.1-4.5
-5.686.2
RAG
91.8+5.6
+4.687.5
Speed
82.9-4.6
GPT-5.5
- Provider
- OpenAI
- Released
- 2026-03-02
- Context
- 400K
- Lab
- Verified
Gemini 2.5 Pro
- Provider
- Released
- 2026-01-28
- Context
- 2,000K
- Lab
- Verified