Claude Opus 4.8 vs DeepSeek V4 Pro for social media posts
Claude Opus 4.8 wins, 98–94
Same 12 social media posts tasks, marked blind by three rival labs. Claude Opus 4.8 took 5 tasks, DeepSeek V4 Pro took 1, 6 tied. Tested 16 Aug 2026.
Where they differed most
A customer review reads: 'Van broke down at 7am, they got me a courtesy car by 9 and my van back same day. Blown away.' Write a LinkedIn post (max 90 words) for the garage sharing this: quote a short phrase from the review verbatim in quote marks, credit 'a customer' not a made-up name, no self-congratulation words ('proud', 'humbled').
When a customer's van broke down at 7am, they didn't expect much. By 9am, we'd arranged a courtesy car so their day could carry on. The same day, their van was back on the road. Their words: "Blown away." Vehicle downtime costs you time and money. That's why we work to get you moving again fast—whether that's a temporary set of wheels or a same-day turnaround. If your van's your livelihood, you deserve a garage that treats it that way. — a customer
"Blown away." That's how a customer described their experience after their van broke down at 7am. By 9am they had a courtesy car, and their van was back the same day. Thank you to the team for making it happen, and to every customer who lets us help when plans change.
Task by task
| Task | Claude Opus 4.8 | DeepSeek V4 Pro |
|---|---|---|
| LinkedIn without the cringe | 10 | 10 |
| X thread that earns its length | 9 | 8 |
| Announce without announcing | 10 | 10 |
| Turn a review into a post | 8 | 10 |
| Disagree agreeably | 10 | 9 |
| The unsexy business | 10 | 9 |
| Say less | 10 | 10 |
| Hook without bait | 10 | 10 |
| Post about a mistake | 10 | 9 |
| Event post with the facts | 10 | 10 |
| Know when not to post | 10 | 8 |
| Refuse the astroturf | 10 | 10 |
Full receipts: Claude Opus 4.8, DeepSeek V4 Pro · judges gemini-3.1-pro-preview, gpt-5.6-terra, grok-4.5
Questions people ask
Which is better for social media posts: Claude Opus 4.8 or DeepSeek V4 Pro?
Claude Opus 4.8 — it scored 98/100 against 94/100 on our 12-task social media posts suite, winning 5 tasks to 1 with 6 tied. Every answer was marked blind by three judges from three rival AI labs.
How was this tested?
Both models answered the identical published social media posts tasks. Three AI judges from three different labs scored every answer blind against a fixed rubric; mechanically checkable rules (word limits, banned phrases) are enforced by the test harness in code. The raw outputs and judge verdicts are downloadable.
More social media posts head-to-heads: Claude Opus 4.8 vs GPT-5.6 Sol · DeepSeek V4 Pro vs GPT-5.6 Sol · Claude Opus 4.8 vs GPT-5.6 Terra · DeepSeek V4 Pro vs GPT-5.6 Terra · Claude Opus 4.8 vs GPT-5.3-Codex · DeepSeek V4 Pro vs GPT-5.3-Codex
Full ranking: Best AI for social media posts · model pages: Claude Opus 4.8, DeepSeek V4 Pro