AI video generator pricing compared by cost per finished minute: credits, free tiers, and plan math for HeyGen, Synthesia, Veo, Kling, Runway, D-ID, and Hedra.
AI video generator pricing is hard to compare because every tool bills in a different unit. Some charge credits per second of footage, some per minute of finished video, some per video, and some per listing or project.
This guide converts the major tools into one unit, the cost of one finished minute on the cheapest plan that clears it, and explains the credit rules that change the real bill.
All prices were verified in October 2026 from vendor pricing pages, credit guides, and dated pricing trackers.
The Short Answer
Presenter-style tools are the cheapest per finished minute, at roughly $1.50 to $3.00. Cinematic models cost more per minute, from about $1.50 on Google Veo 3.1 Lite to more than $15 on Runway's flagship model, because they bill every second of generated footage and most teams discard several takes.
Cost Per Finished Minute
Method: plan price divided by included credits, multiplied by the credits one finished minute uses. Veo figures assume 8-second generations at 10 (Lite) or 20 (Fast) credits each. Cinematic figures assume every generation is kept; in practice, budget for re-rolls.
Why Cinematic Models Cost More Than They Look
A presenter tool renders the minute you asked for. A cinematic model generates a few seconds at a time, and many takes are discarded for warped hands, drifting objects, or the wrong camera move.
HeyGen's August 2026 photo-to-video test discarded roughly three clips in every ten across generative tools, which pushes real cost up by about a third. Plan for that buffer when you compare per-second rates.
How Each Pricing Model Works
Credits per minute of finished video
HeyGen, Synthesia, and Hedra charge credits by output length, with different rates per model. On HeyGen, Avatar III costs 4 credits a minute, Avatar IV 31, and Avatar V 48, so the same plan covers very different amounts of video depending on the engine.
Credits per second of footage
Kling and Runway bill every generated second. Kling 3.0 charges 6 credits a second at 720p without audio, 12 at 1080p with audio, and 30 for native 4K. Runway's Gen-4.5 charges 25 credits a second and Gen-4 Turbo 5.
Credits per generation
Google Flow charges per Veo generation regardless of exact length: 10 credits for Lite, 20 for Fast, and 100 for Quality.
Minutes per month
D-ID sells a monthly pool of minutes shared across video, translation, and agents. Pro includes 15 minutes for $29.
Per-second API billing
Developer APIs bill per second without a subscription. HeyGen's API charges $0.0167 a second for an Avatar III Digital Twin, $0.05 for an Avatar IV photo avatar, and $0.0667 for Avatar V, from a $5 prepaid wallet.
Free Tiers Compared
The Credit Rules That Change Your Real Bill
- Rollover. Most subscription credits expire monthly. Hedra's don't roll over, and Runway's Max plan rolls over one month. HeyGen's API credits expire 12 months after purchase.
- Top-ups. HeyGen sells extra credits at $5 per 100 on Pro and above, but Creator can't buy one-time packs.
- Model multipliers. Lip-synced dubbing costs double on Synthesia, at 240 credits a minute against 120. HeyGen's Precision translation costs 10 credits a minute.
- Resolution and audio. Kling's rate doubles from 6 to 12 credits a second when you move from silent 720p to 1080p with audio.
- Annual billing. Kling's annual plans run about 34% cheaper, and HeyGen Creator drops from $29 to $24 a month.
Which Pricing Model Fits Your Work
- Long scripted videos (training, explainers, updates): per-minute presenter tools are cheapest, starting around $1.50 a minute on HeyGen.
- Short cinematic clips: Google Veo 3.1 Lite is cheapest at about $1.50 a minute of footage before re-rolls.
- Hero shots with precise camera moves: Runway costs the most per minute but offers the most control.
- Product features built on video generation: per-second APIs avoid paying for unused subscription credits.
FAQ
How much does an AI video generator cost per minute?
About $1.50 to $3.00 a finished minute for presenter tools such as HeyGen and Synthesia. Cinematic models range from about $1.50 on Veo 3.1 Lite to $15 on Runway Gen-4.5, before re-rolls.
What is the cheapest AI video generator?
For finished presenter video, HeyGen Creator at about $1.50 a minute on Avatar IV. For cinematic clips, Google Veo 3.1 Lite through Google AI Pro at $19.99 a month.
Do AI video credits roll over?
Usually not. Most monthly credits expire at the end of the billing cycle. Runway Max rolls over one month, and HeyGen API credits last 12 months.
Why do AI video tools use credits instead of minutes?
Because different models cost different amounts to run. Credits let one plan cover cheap and expensive models at different rates, such as HeyGen's 31 credits a minute for Avatar IV and 48 for Avatar V.
Is annual billing worth it for AI video?
If you'll use the tool every month, yes. Kling's annual plans save about 34%, and HeyGen Creator drops from $29 to $24 a month.
The Bottom Line
Compare AI video generator pricing by cost per finished minute, not by plan price. Presenter tools are cheapest for long scripted videos, Veo 3.1 Lite is cheapest for cinematic clips, and every generative model needs a buffer for discarded takes.
Greetings! My name is Ayesha Shaheryar. My words have helped millions over the past two years. As a HeyGen expert and a writer, I am here to introduce tips and tricks to edit your next video in no time.
