GPT-5.5
VS
Grok 4.20 Beta
GPT-5.5 vs Grok 4.20 Beta: which wins at real work?
22 task areas · same graded test runs · rank comparison only, so 0–100 and Elo collections never mix raw scores.
GPT-5.5 wins 21 of 22 task areas we tested; Grok 4.20 Beta takes 1. Grok 4.20 Beta costs 4.4× less per token ($8 vs $35 per 1M).
Grok 4.20 Beta costs 4.4× less per token ($8 vs $35 per 1M).
Task by task
| Task area | GPT-5.5 | Grok 4.20 Beta | Winner |
|---|---|---|---|
| Legal & HR |
#9
/ 110
Excellent
|
#106
/ 110
Strong
|
GPT-5.5 |
| Content & Brand |
#4
/ 124
Strong
|
#99
/ 124
Usable
|
GPT-5.5 |
| Creative & Comedy | #2 / 110 | #92 / 110 | GPT-5.5 |
| Translation & Localization |
#3
/ 110
Excellent
|
#90
/ 110
Strong
|
GPT-5.5 |
| Summarization & Meeting Notes |
#10
/ 110
Excellent
|
#95
/ 110
Excellent
|
GPT-5.5 |
| Knowledge & Docs |
#5
/ 110
Excellent
|
#86
/ 110
Usable
|
GPT-5.5 |
| Research & Competitive Analysis |
#7
/ 110
Excellent
|
#86
/ 110
Needs editing
|
GPT-5.5 |
| RAG, Safety & Grounding |
#16
/ 113
Excellent
|
#93
/ 113
Strong
|
GPT-5.5 |
| Coding |
#1
/ 115
Excellent
|
#77
/ 115
Strong
|
GPT-5.5 |
| Customer Support |
#3
/ 113
Strong
|
#72
/ 113
Usable
|
GPT-5.5 |
| Executive Assistant |
#11
/ 112
Strong
|
#69
/ 112
Strong
|
GPT-5.5 |
| Presentations & Decks |
#3
/ 110
Excellent
|
#56
/ 110
Strong
|
GPT-5.5 |
| Landing Pages |
#9
/ 72
Strong
|
#60
/ 72
Usable
|
GPT-5.5 |
| Data & Analytics |
#48
/ 110
Excellent
|
#91
/ 110
Excellent
|
GPT-5.5 |
| Structured Output |
#3
/ 113
Excellent
|
#43
/ 113
Excellent
|
GPT-5.5 |
| Chef / Home Cooking |
#4
/ 126
Strong
|
#38
/ 126
Usable
|
GPT-5.5 |
| Investor & Pitch |
#16
/ 66
Strong
|
#43
/ 66
Usable
|
GPT-5.5 |
| Product & Project Management |
#8
/ 110
Excellent
|
#31
/ 110
Excellent
|
GPT-5.5 |
| Frontend & Landing Pages |
#13
/ 109
Needs editing
|
#32
/ 109
Needs editing
|
GPT-5.5 |
| AI Strategy |
#62
/ 126
Strong
|
#49
/ 126
Strong
|
Grok 4.20 Beta |
| Training & Education |
#63
/ 110
Excellent
|
#76
/ 110
Strong
|
GPT-5.5 |
| Sales |
#42
/ 110
Usable
|
#46
/ 110
Usable
|
GPT-5.5 |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Frequently asked
Is GPT-5.5 better than Grok 4.20 Beta?
Across 22 task areas we benchmarked, GPT-5.5 ranks higher in 21 and Grok 4.20 Beta in 1.
Which is cheaper, GPT-5.5 or Grok 4.20 Beta?
Grok 4.20 Beta costs 4.4× less per token ($8 vs $35 per 1M).
What is GPT-5.5 better at?
GPT-5.5 out-ranks Grok 4.20 Beta at Legal & HR, Content & Brand, Creative & Comedy.
What is Grok 4.20 Beta better at?
Grok 4.20 Beta out-ranks GPT-5.5 at AI Strategy.
More comparisons
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Prompt × model results
12 test cases · 3 evals