Claude Opus 4.8
VS
Grok 4.20
Claude Opus 4.8 vs Grok 4.20: 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.
Claude Opus 4.8 wins 20 of 22 task areas we tested; Grok 4.20 takes 2. Grok 4.20 costs 8.0× less per token ($3.75 vs $30 per 1M).
Grok 4.20 costs 8.0× less per token ($3.75 vs $30 per 1M).
Task by task
| Task area | Claude Opus 4.8 | Grok 4.20 | Winner |
|---|---|---|---|
| Content & Brand |
#8
/ 124
Strong
|
#118
/ 124
Needs editing
|
Claude Opus 4.8 |
| Data & Analytics |
#2
/ 110
Excellent
|
#102
/ 110
Excellent
|
Claude Opus 4.8 |
| Chef / Home Cooking |
#9
/ 126
Strong
|
#100
/ 126
Needs editing
|
Claude Opus 4.8 |
| Training & Education |
#2
/ 110
Excellent
|
#88
/ 110
Strong
|
Claude Opus 4.8 |
| RAG, Safety & Grounding |
#11
/ 113
Excellent
|
#96
/ 113
Strong
|
Claude Opus 4.8 |
| Sales |
#1
/ 110
Strong
|
#85
/ 110
Usable
|
Claude Opus 4.8 |
| Coding |
#3
/ 115
Excellent
|
#86
/ 115
Usable
|
Claude Opus 4.8 |
| Legal & HR |
#5
/ 110
Excellent
|
#87
/ 110
Strong
|
Claude Opus 4.8 |
| Creative & Comedy | #17 / 110 | #96 / 110 | Claude Opus 4.8 |
| Executive Assistant |
#9
/ 112
Strong
|
#83
/ 112
Usable
|
Claude Opus 4.8 |
| Knowledge & Docs |
#2
/ 110
Excellent
|
#70
/ 110
Usable
|
Claude Opus 4.8 |
| Translation & Localization |
#35
/ 110
Excellent
|
#98
/ 110
Strong
|
Claude Opus 4.8 |
| Customer Support |
#8
/ 113
Strong
|
#68
/ 113
Usable
|
Claude Opus 4.8 |
| AI Strategy |
#4
/ 126
Strong
|
#59
/ 126
Strong
|
Claude Opus 4.8 |
| Product & Project Management |
#2
/ 110
Excellent
|
#56
/ 110
Strong
|
Claude Opus 4.8 |
| Summarization & Meeting Notes |
#35
/ 110
Excellent
|
#85
/ 110
Excellent
|
Claude Opus 4.8 |
| Landing Pages |
#18
/ 72
Strong
|
#66
/ 72
Usable
|
Claude Opus 4.8 |
| Research & Competitive Analysis |
#5
/ 110
Excellent
|
#52
/ 110
Usable
|
Claude Opus 4.8 |
| Investor & Pitch |
#27
/ 66
Strong
|
#59
/ 66
Usable
|
Claude Opus 4.8 |
| Presentations & Decks |
#32
/ 110
Excellent
|
#46
/ 110
Excellent
|
Claude Opus 4.8 |
| Structured Output |
#61
/ 113
Excellent
|
#48
/ 113
Excellent
|
Grok 4.20 |
| Frontend & Landing Pages |
#21
/ 109
Needs editing
|
#15
/ 109
Needs editing
|
Grok 4.20 |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Frequently asked
Is Claude Opus 4.8 better than Grok 4.20?
Across 22 task areas we benchmarked, Claude Opus 4.8 ranks higher in 20 and Grok 4.20 in 2.
Which is cheaper, Claude Opus 4.8 or Grok 4.20?
Grok 4.20 costs 8.0× less per token ($3.75 vs $30 per 1M).
What is Claude Opus 4.8 better at?
Claude Opus 4.8 out-ranks Grok 4.20 at Content & Brand, Data & Analytics, Chef / Home Cooking.
What is Grok 4.20 better at?
Grok 4.20 out-ranks Claude Opus 4.8 at Structured Output, Frontend & Landing Pages.
More comparisons
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Prompt × model results
12 test cases · 3 evals