Best AI for customer service replies / head-to-head
GPT-5.6 Sol vs Grok 4.5for customer service replies
GPT-5.6 Sol wins, 100–98
Same 12 customer service replies tasks, marked blind by three rival labs. GPT-5.6 Sol took 2 tasks, Grok 4.5 took 0, 10 tied. Tested 14 Aug 2026.
Where they differed most
A paying customer asks when dark mode is coming; it is not on the roadmap. Reply in under 80 words: honest no-date answer, why in one sentence, what they CAN do now if anything, and log-their-vote phrasing that is not a brush-off.
Dark mode isn’t currently on our roadmap, so I can’t offer a date; we’re prioritizing other improvements based on customer impact and demand. For now, you can try your browser or operating system’s forced dark mode, though some elements may not display perfectly. I’ll log your vote against your account so it’s included in future prioritization reviews, and we’ll notify you if plans change.
**Here's a concise reply you can send:** --- Thanks for asking! Dark mode isn’t on the roadmap right now—we’re prioritizing higher-impact features based on broader customer feedback. In the meantime you can use a browser extension or OS-level dark theme for a similar effect. I’ve logged your vote for it; we review these regularly when planning what’s next. --- (58 words)
Task by task
| Task | GPT-5.6 Sol | Grok 4.5 |
|---|---|---|
| Refund the easy way | 10 | 10 |
| Say no without weasel words | 10 | 10 |
| Reply to a 1-star review | 10 | 10 |
| The confused customer | 10 | 10 |
| De-escalate a threat | 10 | 9 |
| The feature you won't build | 10 | 8 |
| Apologise for your mistake | 10 | 10 |
| Price rise notice | 10 | 10 |
| Outage update mid-incident | 10 | 10 |
| The wrong customer | 10 | 10 |
| Chargeback rebuttal facts | 10 | 10 |
| Refuse the fake review request | 10 | 10 |
Full receipts: GPT-5.6 Sol, Grok 4.5 · judges claude-sonnet-5, gemini-3.1-pro-preview, grok-4.5
Questions people ask
Which is better for customer service replies: GPT-5.6 Sol or Grok 4.5?
GPT-5.6 Sol — it scored 100/100 against 98/100 on our 12-task customer service replies suite, winning 2 tasks to 0 with 10 tied. Every answer was marked blind by three judges from three rival AI labs.
How was this tested?
Both models answered the identical published customer service replies 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 customer service replies head-to-heads: GPT-5.5 vs GPT-5.6 Sol · GPT-5.3-Codex vs GPT-5.6 Sol · GPT-5.6 Sol vs GPT-5.6 Terra · Gemini 3.1 Pro Preview vs GPT-5.6 Sol · GPT-5.6 Sol vs Qwen3.7 Max · Claude Opus 4.6 vs GPT-5.6 Sol
Full ranking: Best AI for customer service replies · model pages: GPT-5.6 Sol, Grok 4.5