Claude Opus 4.8
VS
GPT-5 Mini
Claude Opus 4.8 vs GPT-5 Mini: 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 19 of 22 task areas we tested; GPT-5 Mini takes 3. GPT-5 Mini costs 13.3× less per token ($2.25 vs $30 per 1M).
GPT-5 Mini costs 13.3× less per token ($2.25 vs $30 per 1M).
Task by task
| Task area | Claude Opus 4.8 | GPT-5 Mini | Winner |
|---|---|---|---|
| Sales |
#1
/ 110
Strong
|
#102
/ 110
Needs editing
|
Claude Opus 4.8 |
| Executive Assistant |
#9
/ 112
Strong
|
#108
/ 112
Usable
|
Claude Opus 4.8 |
| AI Strategy |
#4
/ 126
Strong
|
#100
/ 126
Usable
|
Claude Opus 4.8 |
| Customer Support |
#8
/ 113
Strong
|
#104
/ 113
Usable
|
Claude Opus 4.8 |
| Training & Education |
#2
/ 110
Excellent
|
#81
/ 110
Strong
|
Claude Opus 4.8 |
| RAG, Safety & Grounding |
#11
/ 113
Excellent
|
#78
/ 113
Excellent
|
Claude Opus 4.8 |
| Content & Brand |
#8
/ 124
Strong
|
#69
/ 124
Strong
|
Claude Opus 4.8 |
| Creative & Comedy | #17 / 110 | #70 / 110 | Claude Opus 4.8 |
| Summarization & Meeting Notes |
#35
/ 110
Excellent
|
#81
/ 110
Excellent
|
Claude Opus 4.8 |
| Structured Output |
#61
/ 113
Excellent
|
#17
/ 113
Excellent
|
GPT-5 Mini |
| Knowledge & Docs |
#2
/ 110
Excellent
|
#41
/ 110
Strong
|
Claude Opus 4.8 |
| Chef / Home Cooking |
#9
/ 126
Strong
|
#45
/ 126
Usable
|
Claude Opus 4.8 |
| Coding |
#3
/ 115
Excellent
|
#37
/ 115
Strong
|
Claude Opus 4.8 |
| Landing Pages |
#18
/ 72
Strong
|
#50
/ 72
Usable
|
Claude Opus 4.8 |
| Data & Analytics |
#2
/ 110
Excellent
|
#27
/ 110
Excellent
|
Claude Opus 4.8 |
| Investor & Pitch |
#27
/ 66
Strong
|
#50
/ 66
Usable
|
Claude Opus 4.8 |
| Translation & Localization |
#35
/ 110
Excellent
|
#52
/ 110
Excellent
|
Claude Opus 4.8 |
| Research & Competitive Analysis |
#5
/ 110
Excellent
|
#21
/ 110
Excellent
|
Claude Opus 4.8 |
| Frontend & Landing Pages |
#21
/ 109
Needs editing
|
#12
/ 109
Needs editing
|
GPT-5 Mini |
| Presentations & Decks |
#32
/ 110
Excellent
|
#39
/ 110
Excellent
|
Claude Opus 4.8 |
| Legal & HR |
#5
/ 110
Excellent
|
#10
/ 110
Excellent
|
Claude Opus 4.8 |
| Product & Project Management |
#2
/ 110
Excellent
|
#1
/ 110
Excellent
|
GPT-5 Mini |
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 GPT-5 Mini?
Across 22 task areas we benchmarked, Claude Opus 4.8 ranks higher in 19 and GPT-5 Mini in 3.
Which is cheaper, Claude Opus 4.8 or GPT-5 Mini?
GPT-5 Mini costs 13.3× less per token ($2.25 vs $30 per 1M).
What is Claude Opus 4.8 better at?
Claude Opus 4.8 out-ranks GPT-5 Mini at Sales, Executive Assistant, AI Strategy.
What is GPT-5 Mini better at?
GPT-5 Mini out-ranks Claude Opus 4.8 at Structured Output, Frontend & Landing Pages, Product & Project Management.
More comparisons
This page is Spring Prompt, running in public
We just did this for every model. Do it for your prompt.
The rankings above come from running real tasks through real models and scoring every output. Spring Prompt is that same engine — pointed at your prompt, your test cases, and your definition of good.
- Generate test cases from your prompt — no eval set required to start.
- Compare models side by side with quality, cost and latency in one matrix.
- Optimise the winner until the scores say it's ready to ship.
Prompt × model results
12 test cases · 3 evals