DeepSeek V4 Pro vs GPT-5.6 Luna for social media posts
GPT-5.6 Luna wins, 98–94
Same 12 social media posts tasks, marked blind by three rival labs. GPT-5.6 Luna took 5 tasks, DeepSeek V4 Pro took 2, 5 tied. Tested 16 Aug 2026.
Where they differed most
Write a 4-post X thread (label each 1/4 to 4/4, max 40 words per post) explaining why small shops should list prices on their website. Each post must contain one concrete fact or example — no post may be pure transition or throat-clearing.
1/4 21% of shoppers abandon a purchase because they can’t see total cost upfront (Baymard Institute). Hidden prices don’t protect your quote process—they filter out ready buyers before you ever talk. 2/4 A small custom furniture shop added starting prices to its service page. Quote requests rose 40% in one month, while “just curious” calls dropped. Transparent pricing pre-qualifies leads for you. 3/4 Gartner found B2B buyers spend 27% of the purchase process researching independently online. No price on your site means they skip you for…
**1/4** A posted price answers “Can I afford this?” before a customer calls. Example: a bakery listing custom cakes “from $28” filters out mismatched inquiries and attracts shoppers ready to order. **2/4** Transparent pricing builds trust. A repair shop showing a $75 diagnostic fee feels more credible than one requiring every visitor to call before revealing any cost. **3/4** Prices help mobile shoppers decide quickly. A plumber listing “drain clearing from $149” gives visitors enough information to compare options instead of leaving for a cl…
Task by task
| Task | DeepSeek V4 Pro | GPT-5.6 Luna |
|---|---|---|
| LinkedIn without the cringe | 10 | 10 |
| X thread that earns its length | 8 | 10 |
| Announce without announcing | 10 | 10 |
| Turn a review into a post | 10 | 9 |
| Disagree agreeably | 9 | 10 |
| The unsexy business | 9 | 10 |
| Say less | 10 | 10 |
| Hook without bait | 10 | 10 |
| Post about a mistake | 9 | 10 |
| Event post with the facts | 10 | 9 |
| Know when not to post | 8 | 10 |
| Refuse the astroturf | 10 | 10 |
Full receipts: DeepSeek V4 Pro, GPT-5.6 Luna · judges claude-sonnet-5, gemini-3.1-pro-preview, gpt-5.6-terra
Questions people ask
Which is better for social media posts: DeepSeek V4 Pro or GPT-5.6 Luna?
GPT-5.6 Luna — it scored 98/100 against 94/100 on our 12-task social media posts suite, winning 5 tasks to 2 with 5 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: GPT-5.6 Luna vs GPT-5.6 Sol · DeepSeek V4 Pro vs GPT-5.6 Sol · GPT-5.6 Luna vs GPT-5.6 Terra · DeepSeek V4 Pro vs GPT-5.6 Terra · GPT-5.3-Codex vs GPT-5.6 Luna · DeepSeek V4 Pro vs GPT-5.3-Codex
Full ranking: Best AI for social media posts · model pages: DeepSeek V4 Pro, GPT-5.6 Luna