GPT-5.5 edges Gemini 3.1 Pro by 2 points on AI Index
OpenAI's April launch flipped a dead heat into a clear benchmark lead...
Get AI news that actually matters
One email a day. Zero fluff. Join 10,000+ professionals.
Deep Dive
OpenAI’s GPT-5.5 scored 59 on the Artificial Analysis Intelligence Index, ranking #2 of 141 models—two points ahead of Google’s Gemini 3.1 Pro at 57. OpenAI’s April 23, 2026 launch flipped a dead heat into a clear ChatGPT lead on most head-to-head benchmarks. Google answered on May 19, 2026.
Key Points
- GPT-5.5 scores 59 on AI Index, #2 of 141 models, vs Gemini 3.1 Pro at 57
- OpenAI launched GPT-5.5 on April 23, 2026, flipping a previous tie
- Google responded May 19 with a Gemini 3.1 Pro update but still trails in reasoning benchmarks
Why It Matters
The two-point lead shifts enterprise AI decisions — performance benchmarks now favor ChatGPT for complex reasoning tasks.