Compare · ModelsLive · 2 picked · head to head
GPT-5.5 vs Grok 4.6
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.5 wins on 2/2 benchmarks
GPT-5.5 wins 2 of 2 shared benchmarks. Leads in reasoning · knowledge.
Category leads
reasoning·GPT-5.5knowledge·GPT-5.5
Hype vs Reality
Attention vs performance
GPT-5.5
#2 by perf·#4 by attention
Grok 4.6
#62 by perf·#15 by attention
Best value
Grok 4.6
3.0x better value than GPT-5.5
GPT-5.5
4.9 pts/$
$17.50/M
Grok 4.6
14.4 pts/$
$4.00/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
xAI
$250.0B·Tier 1
Head to head
2 benchmarks · 2 models
GPT-5.5Grok 4.6
ARC-AGI
GPT-5.5 leads by +7.5
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
GPT-5.5
95.0
Grok 4.6
87.5
GPQA diamond
GPT-5.5 leads by +1.6
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
GPT-5.5
93.6
Grok 4.6
92.0
Full benchmark table
| Benchmark | GPT-5.5 | Grok 4.6 |
|---|---|---|
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 95.0 | 87.5 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 93.6 | 92.0 |
Pricing · per 1M tokens · projected $/mo at 10M tokens