Our verdict: pick by the job, then check the credit rule
If most of your videos are talking heads, interviews or narrated tutorials, the AI features that save editing time are transcript-based: filler-word removal, gap shortening, retake detection and audio clean-up. Descript documents all four. If your work is short social video built from templates and stock, captions with styles and generation tools matter more, and CapCut and FlexClip document more of those.
Whichever tool you choose, AI features are not free once you leave the trial: most draw on a monthly credit allowance that does not roll over. Treat the allowance as a budget line.
Feature matrix from official documentation
Each cell summarises what the vendor's own pages said on 30 October 2026. Where pages conflict, both are shown.
| Feature | Descript | Filmora | CapCut | FlexClip |
|---|---|---|---|---|
| Auto captions | Dynamic captions unlimited on all plans; SRT/VTT export | Speech to Text and Dynamic Captions; plan gating not stated in guide | Free on CapCut Web per tool page; help article lists auto captions among Pro advanced tools | AI subtitles; downloads SRT, VTT and more; segments under 30 minutes advised |
| Silence or gap removal | Shorten Word Gaps (AI credits) | Silence Detection; delete all silent clips in text-based editing | Not documented on pages fetched | Not documented on pages fetched |
| Filler-word removal | Remove Filler Words, English only (AI credits) | Not documented on pages fetched | Not documented on pages fetched | Remove Filler Words in AI text-based editing (40-minute max) |
| Audio clean-up | Studio Sound: noise, echo, level differences | Not checked for this guide | Standard includes noise reduction and loudness adjustment | Not checked for this guide |
| AI voice | AI speech and voice clones (limited on Free) | Text to speech and voice cloning | Text to speech, 200+ voices, free to try; Premium TTS uses credits | Text to speech up to 4,000 characters a section; voice cloning |
| Generation | Generated video and layouts use credits | Not checked for this guide | Pro: AI avatars and AI-generated content | Text to video; AI Plan from $9.9 for 300 credits |
| Included credits | Free 100 one-time; Hobbyist 400, Creator 800, Business 1,500 a month | Advanced 1,000 every 30 days; Perpetual 1,000 one-time | Pro 1,200 AI points after March 2026 change | Plus 300 a month; Business 600 or 800 (pages conflict) |
How credits are charged
Descript says most credit costs scale with media length, the model chosen or the amount removed. Studio Sound and Remove Filler Words are capped at 30 credits per file per application, and Underlord has no fixed price per action. Unused credits reset at renewal. Top-ups (350 for $35, 1,000 for $80, 4,000 for $200) are sold only on Creator and Business, expire after 12 months and are non-refundable.
FlexClip shows the estimated credit cost before each generation and says the amount displayed is what will be charged. Plan credits refresh each billing cycle without rolling over; one-time packs last 365 days. Filmora issues subscription credits every 30 days from purchase. CapCut's help describes credits as a pay-per-use currency for advanced AI features such as AI image generation, AI script-to-video and Premium Text-to-Speech, separate from Pro, which unlocks features such as 4K export and watermark-free output and sometimes includes monthly bonus credits.
Which AI features save real time, by video type
This is editorial judgement from how the features are documented, not measured time savings.
| Video type | Most useful AI features | Lower value | Main review risk |
|---|---|---|---|
| Narrated screen tutorial | Captions, gap shortening, audio clean-up | Generation, avatars | Cutting pauses where the viewer needs to watch the screen |
| Interview or podcast video | Filler-word removal, retake detection, audio clean-up | Templates | Over-cutting natural speech; speaker overlap |
| Short social clips | Styled captions, text to speech, templates | Transcript editing of long media | Caption errors in large on-screen text |
| Product promo | Text to video, voice, stock | Filler removal | Generated claims or visuals that do not match the product |
Review steps before publishing
AI edits change what the viewer hears and reads, so review them as carefully as a manual edit. Descript's Remove Retakes marks earlier takes as ignored text you can restore, and its filler-word tool lets you choose per instance; use those review modes rather than applying everything at once.
- Watch every cut point created by filler or gap removal at normal speed.
- Read captions against the audio, especially names, numbers and negations.
- Listen to AI voice lines for mispronounced product names and wrong emphasis.
- Check that you have the speaker's permission before cloning or synthesising a voice.
- Confirm generated visuals do not imply features, results or people that are not real.
- Compare final duration with the original to catch accidental large deletions.
Who should skip paying for AI features
If you publish one or two videos a month with clean audio and little speech, the included free features or a manual edit may be enough; paying for a credit allowance you do not use is the most common waste. If your only need is captions, check whether your destination platform generates them for free: YouTube documents automatic captions in many languages, though it says creators should always review them.
Questions before you decide
Which AI video editor removes filler words automatically?
On the official pages we fetched, Descript (English transcripts, uses AI credits) and FlexClip (Remove Filler Words inside AI text-based editing, up to 40 minutes) document it. Filmora documents silence detection but not filler words, and CapCut pages we fetched documented neither.
Are CapCut auto captions free?
CapCut's pages conflict. Its AI caption generator page says the feature on CapCut Web is free to use, while its Standard vs Pro help article lists auto captions among Pro advanced AI tools. Check whether a Pro prompt appears in your app before planning around it.
Do AI credits roll over?
Not for the included allowances we checked. Descript resets unused credits at renewal and FlexClip says plan credits do not roll over. Paid top-ups last longer: 12 months for Descript and 365 days for FlexClip one-time packs.
Sources & verification
Product details and prices can change. Check the linked provider before buying.
- Descript pricing Accessed 30 Oct 2026
- Descript Help: sound good with AI tools Accessed 30 Oct 2026
- Descript Help: track and understand your media minutes and AI credits Accessed 30 Oct 2026
- Descript Help: top ups for media minutes and AI credits Accessed 30 Oct 2026
- Descript Help: filler words Accessed 30 Oct 2026
- Wondershare Filmora: plans, perpetual licence terms and FAQ Accessed 30 Oct 2026
- Filmora user guide: Silence Detection (Windows) Accessed 30 Oct 2026
- Filmora user guide: auto captions (Windows) Accessed 30 Oct 2026
- Filmora user guide: AI text-based editing Accessed 30 Oct 2026
- Filmora user guide: AI voice cloning Accessed 30 Oct 2026
- CapCut Help: CapCut Standard vs Pro Accessed 30 Oct 2026
- CapCut Help: buying Pro plans Accessed 30 Oct 2026
- CapCut Help: pricing change Accessed 30 Oct 2026
- CapCut: AI caption generator (CapCut Web) Accessed 30 Oct 2026
- CapCut: text to speech Accessed 30 Oct 2026
- FlexClip: pricing and free version explained Accessed 30 Oct 2026
- FlexClip Help: video editor plan benefits Accessed 30 Oct 2026
- FlexClip Help: types of AI credits and how they are issued Accessed 30 Oct 2026
- FlexClip Help: AI tools credit consumption guide Accessed 30 Oct 2026
- FlexClip Help: AI text-based editing Accessed 30 Oct 2026
- FlexClip Help: AI text-to-speech tool Accessed 30 Oct 2026
- FlexClip Help: AI video generator (text to video) Accessed 30 Oct 2026
- FlexClip Help: supported video, audio, image, font, subtitle and LUT file formats Accessed 30 Oct 2026
- YouTube Help: use automatic captioning Accessed 30 Oct 2026
- Descript Help: Exporting subtitles Accessed 30 Oct 2026
Sources link directly to providers. Product buttons may use separately labeled affiliate links. Read our disclosure.