# Comment and sentiment research with AI: what a comment section is really saying Your AI reads the comments under the posts you choose and tells you the topics and their shares, the questions people ask and the overall mood, with quotes. It uses the Comment analysis tool and 15 interfaces. A real run recorded 2026-10-18 answered “What are people saying in the comments under NASA's latest TikTok videos?” with 1 request for 38 credits (≈ $0.076–$0.13). Failed calls are free. - Page: https://socialtoai.com/use-cases/comment-sentiment-research/ - Last updated: 2026-10-21 ## What you get Your AI reads the comments under the posts you choose and tells you the topics and their shares, the questions people ask and the overall mood, with quotes. A popular post has hundreds of comments, and the platform shows them a page at a time. Counting topics and moods across several posts by hand rarely gets done. ## What it uses The ready-made tool does the whole job in one request: SocialToAI runs the searches, reads the posts and comments, and returns one result with its sources. Each is priced before it runs. - [Comment analysis](https://socialtoai.com/tools/comment-insights.md): The topics in their comments and how big each is, plus questions, buying intent and complaints. From 38 credits a run. Your AI can also call the interfaces one at a time. These are the ones this job reads; each costs a fixed number of credits per call. | Platform | Interface | What it returns | Price key | Credits | | --- | --- | --- | --- | --- | | TikTok | [Comments](https://socialtoai.com/tiktok-comments-api.md) | The comments under one video: text, likes, reply count and time. | `tiktok.comments` | 2 | | TikTok | [Comments · reply_of](https://socialtoai.com/tiktok-comments-api.md) | The comments under one video: text, likes and time. | `tiktok.comments:replies` | 2 | | YouTube | [Comments](https://socialtoai.com/youtube-comments-api.md) | The comments under one video: text, likes and reply count. | `youtube.comments` | 2 | | YouTube | [Comments · reply_of](https://socialtoai.com/youtube-comments-api.md) | The comments under one video: text and likes. | `youtube.comments:replies` | 2 | | Instagram | [Comments](https://socialtoai.com/instagram-comments-api.md) | The comments under one post: text, likes and time. | `instagram.comments` | 2 | | Instagram | [Comments · reply_of](https://socialtoai.com/instagram-comments-api.md) | The comments under one post: text and time. | `instagram.comments:replies` | 2 | | Reddit | [Comments](https://socialtoai.com/reddit-comments-api.md) | The comments under one post: text, likes, reply count and time. | `reddit.comments` | 2 | | X | [Comments](https://socialtoai.com/x-comments-api.md) | The comments under one post: text, likes, reply count and time. | `x.comments` | 2 | | Xiaohongshu | [Comments](https://socialtoai.com/xiaohongshu-comments-api.md) | The comments under one note: text, likes, reply count and time. | `xiaohongshu.comments` | 12 | | Xiaohongshu | [Comments · reply_of](https://socialtoai.com/xiaohongshu-comments-api.md) | The comments under one note: text, likes and time. | `xiaohongshu.comments:replies` | 12 | | Douyin | [Comments](https://socialtoai.com/douyin-comments-api.md) | The comments under one video: text, likes, reply count and time. | `douyin.comments` | 2 | | Douyin | [Comments · reply_of](https://socialtoai.com/douyin-comments-api.md) | The comments under one video: text, likes and time. | `douyin.comments:replies` | 2 | | Bilibili | [Comments](https://socialtoai.com/bilibili-comments-api.md) | The comments under one video: text, likes, reply count and time. | `bilibili.comments` | 2 | | Bilibili | [Comments · reply_of](https://socialtoai.com/bilibili-comments-api.md) | The comments under one video: text, likes, reply count and time. | `bilibili.comments:replies` | 2 | 1 more on the platforms' own pages: [TikTok API](https://socialtoai.com/platforms/tiktok.md), [YouTube API](https://socialtoai.com/platforms/youtube.md), [Instagram API](https://socialtoai.com/platforms/instagram.md), [Reddit API](https://socialtoai.com/platforms/reddit.md), [X (Twitter) API](https://socialtoai.com/platforms/x.md), [Xiaohongshu (RedNote) API](https://socialtoai.com/platforms/xiaohongshu.md), [Douyin API](https://socialtoai.com/platforms/douyin.md), [Bilibili API](https://socialtoai.com/platforms/bilibili.md). ## A worked example A real run on the live service, recorded 2026-10-18: the question, the calls the AI chose and what it answered. The credits are what the run was charged. > What are people saying in the comments under NASA's latest TikTok videos? | Platform | Tool | Sent | Requests | Returned | Credits | | --- | --- | --- | --- | --- | --- | | TikTok | [`comment_insights`](https://socialtoai.com/tools/comment-insights.md) | `targets: ["https://www.tiktok.com/@nasa/video/7691683140015820046","https://www.tiktok.com/@nasa/video/7694283957839400206"] · scale: "small"` | 1 | 199 comments | 38 | | **Total** | | | 1 | 199 items | **38** | Recorded 2026-10-18 I read 199 comments under 2 videos; 157 could be judged. The topics that come up most: 1. **Excitement about space** (18%, 28 comments): [“fuck yeah space is so fucking cool”](https://www.tiktok.com/@nasa/video/7691683140015820046) 2. **Flat-earth and “space is fake” claims** (17%, 27 comments): [“people saying the world is flat and this is all lies lol”](https://www.tiktok.com/@nasa/video/7694283957839400206) 3. **SpaceX missions** (13%, 21 comments): [“Imagine your last car ride on earth is in a Tesla”](https://www.tiktok.com/@nasa/video/7691683140015820046) Used 38 credits · $0.13. Every claim links to its source. The posts it rests on, and the same calls as API requests, are in the [whole recorded run](https://socialtoai.com/docs/guides/analyse-tiktok-comments.md). 38 credits is $0.13 at 300 credits per dollar (purchases from $10) and $0.076 at 500 per dollar (from $200). Failed calls are free, and a search that runs and finds nothing is charged as a call. ## Platform by platform - [How do I analyse the comments under TikTok videos with AI?](https://socialtoai.com/docs/guides/analyse-tiktok-comments.md) - [How do I get my AI to read Reddit and X for product complaints?](https://socialtoai.com/docs/guides/read-reddit-and-x-for-product-complaints.md) - [How do I find out what viewers complain about in YouTube comments with AI?](https://socialtoai.com/docs/guides/analyse-youtube-comments.md) - [How do I see what people ask in the comments under Douyin videos with AI?](https://socialtoai.com/docs/guides/analyse-douyin-comments.md) ## Give this to your AI Connect SocialToAI once: in [Claude](https://socialtoai.com/connect/claude.md), [ChatGPT](https://socialtoai.com/connect/chatgpt.md), [Claude Code](https://socialtoai.com/connect/claude-code.md), [Cursor](https://socialtoai.com/connect/cursor.md) and [Codex](https://socialtoai.com/connect/codex.md) you sign in and press Allow, with no key to paste; other clients are on [the connect page](https://socialtoai.com/mcp.md). Then paste this and replace the parts in angle brackets. Never paste a key into a chat. **Prompt** ``` Use the SocialToAI tools (https://mcp.socialtoai.com/mcp) to analyse the comments under these posts: . With the Comment analysis tool, tell me the main topics and their shares, the questions people ask most, and the overall mood, with three quotes per topic. Tell me what it cost in credits. ``` - [The whole recorded run](https://socialtoai.com/docs/guides/analyse-tiktok-comments.md): What are people saying in the comments under NASA's latest TikTok videos? - [Comment analysis](https://socialtoai.com/tools/comment-insights.md): The topics in their comments and how big each is, plus questions, buying intent and complaints - [TikTok API](https://socialtoai.com/platforms/tiktok.md): Every call on TikTok, with its credits. - [YouTube API](https://socialtoai.com/platforms/youtube.md): Every call on YouTube, with its credits.