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Sora is no longer an option. OpenAI closed the Sora app on April 26, 2026 and removed Sora 2 from its API on September 24, 2026. Between the two left, Kling 3.0 makes longer clips with native audio, from 3 to 15 seconds, and Runway's Gen-4.5 costs 12 credits a second at 720p. On Oakgen, Kling v3 Pro costs 284 credits for 5 seconds with audio. All facts were read on October 25, 2026.
This post first ran in March 2026, when Sora was still live. We rewrote it in October from each vendor's current pages.
How do Kling, Runway and Sora compare in 2026?
Kling and Runway are both live and both sell credits. Sora is shut down. The table uses each vendor's own pages, read on October 25, 2026.
| Kling 3.0 | Kling 4.0 | Runway Gen-4.5 | Sora 2 | |
|---|---|---|---|---|
| Status | Live | Full launch in October 2026, Flash in early access since September 28 | Live | App closed April 26, 2026, API removed September 24, 2026 |
| Clip length | 3 to 15 seconds | 3 to 30 seconds | Credits charged per second, 2-second minimum on the API | None |
| Resolution | 720p, 1080p, 4K | 720p, 1080p, 4K, 10-bit HDR at 1080p and 4K | 720p (1280:720 on the API) | None |
| Native audio | Yes, single channel | Yes, two-channel stereo | Not listed on the pricing page | None |
| Multi-shot or keyframes | Multi-shot, start and end frames | Up to 10 keyframes | Not listed | None |
| Price signal | Runway's API lists Kling 3.0 Pro at 17 credits a second with audio ($0.17) | No price on the Kling pages we could load | 12 credits a second ($0.12 on the API) | None |
| On Oakgen | Yes, as Kling v3 Pro | No | No | No |
Kling specs come from Kling's Kling 3.0 page and its Kling 4.0 vs 3.0 comparison. Runway figures come from Runway's pricing page, its API pricing page (credits at $0.01 each) and its Gen-4.5 API page. Sora's status comes from OpenAI's help center and API deprecations page.
What happened to Sora 2?
OpenAI shut it down in two stages. Its help center says "The Sora web and app experiences were discontinued on April 26, 2026" and "The Sora API will be discontinued on September 24, 2026". The API deprecations page lists the Videos API, sora-2, sora-2-pro and the dated snapshots with a shutdown date of 2026-09-24 and no recommended replacement.
If you made videos in Sora, the help center says you can still export them at sora.chatgpt.com/sunset, and that OpenAI will delete Sora data after any final export window. For what to use instead, see our Sora replacements guide.
What does Kling do well, and where does it fall short?
Kling covers the most ground for prompt-to-clip work. Kling's own pages describe Kling 3.0 as generating video and audio in one pass, including dialogue in five languages, with multi-shot sequences and clips from 3 to 15 seconds. Kling 4.0 doubles the length to 30 seconds and adds stereo sound and HDR, but Kling says the full model only launches in October 2026.
Pros
- Native audio with dialogue, sound effects and lip sync on Kling 3.0, per Kling's feature page
- Clips up to 15 seconds on 3.0 and 30 seconds on 4.0
- Start and end frames on 3.0, and up to 10 keyframes on 4.0
- 720p, 1080p and 4K listed for both versions in Kling's own comparison
Cons
- Kling 4.0 is new and only partly rolled out, so most third-party apps, Oakgen included, still run 3.0
- Kling 3.0 audio is single channel and its output is 8-bit SDR, by Kling's own comparison
- Kling's developer pricing page did not render for us, so we used Runway's API listing as the price signal
What does Runway do well, and where does it fall short?
Runway is a full video app as well as a model. Its pricing page lists Gen-4.5 at 12 credits a second, Aleph 2.0 for editing at 140 credits per 5 seconds, and models from other labs, including Kling 3.0 and Seedance 2.5, on the paid plans.
Pros
- One plan covers Runway's own models and several outside ones, including Kling 3.0
- Aleph 2.0 edits existing footage, which a prompt-only model cannot
- Gen-4.5 is cheap per second on the API at $0.12
- Professional export formats for Gen-4.5 and Aleph 2.0 on the API, for an extra per-second charge
Cons
- Gen-4.5 outputs 720p on Runway's API page
- The pricing page sells audio as separate models and does not list native audio for Gen-4.5
- The Standard plan's 625 credits cover about 52 seconds of Gen-4.5 a month, by Runway's own example
| Runway plan | Monthly | Billed yearly | Credits a month |
|---|---|---|---|
| Free | $0 | $0 | 125, one time |
| Standard | $15 | $12 a month | 625 |
| Pro | $35 | $28 a month | 2,250 |
| Max | $95 | $76 a month | 9,500 |
Plans from Runway's pricing page, read on October 25, 2026.
Which one should you pick?
Pick by the job, since no one tool leads on everything.
- Talking or sound-heavy clips from a prompt. Kling 3.0, for native audio with dialogue.
- Clips longer than 15 seconds in one pass. Kling 4.0 once it is fully out, or Seedance 2.5 on Oakgen, which runs up to 30 seconds.
- Editing footage you already shot. Runway, with Aleph 2.0.
- The lowest price per second through an API. Runway's Gen-4.5 at $0.12, if 720p is enough.
- Sora's look. Sora is gone. Test Seedance 2.5 or Kling v3 Pro on the same prompt, and see our Seedance 2.5 vs Kling 3 vs Veo 3.1 comparison.
How do you use Kling on Oakgen?
Oakgen's video generator runs Kling v3 Pro (check the model picker for newer Kling versions as they are added), and it does not offer Runway or Sora models. The Kling v3 Pro generator takes a prompt of up to 2,500 characters, a duration from 3 to 15 seconds, an aspect ratio of 16:9, 9:16 or 1:1, and an audio switch that is on by default.
| Kling model on Oakgen | What it does | Credits per second | 5-second clip |
|---|---|---|---|
| Kling v3 Pro, audio on | Text or image to video | 57 | 284 |
| Kling v3 Pro, audio off | Text or image to video | 38 | 190 |
| Kling V3 Pro Motion Control | Moves a character image with the motion from a reference video | 57 | 284 |
| Kling O3 Pro Video Edit | Edits a clip you upload from a text instruction | 57 | 284 |
Prices are from Oakgen's pricing code on October 25, 2026, and the generator shows the exact cost before each run. In money, 284 credits is about $1.35 on the Basic plan ($19 for 4,000 credits) and about $0.94 on the monthly Creator plan ($99 for 30,000 credits), using the pricing page on October 30, 2026. Plan prices can change.
The same credits also run Seedance 2.5, Seedance 2.0, MiniMax H3 Max, Gemini Omni Flash and Grok Imagine Video in the AI video generator, so you can run one prompt on Kling and on a second model and keep the better clip.
When is another tool a better choice than Oakgen?
- You want Kling 4.0 now. Oakgen does not have it yet. Use Kling's own app.
- Your work is mostly editing. Runway's Aleph 2.0 and its editing tools cover more than Oakgen's video-edit models.
- You need the cheapest Kling per second. Runway's API lists Kling 3.0 Pro with audio at 17 credits, or $0.17, a second. Oakgen charges 57 credits a second, which is between about $0.19 and $0.27 depending on your plan.
- You live in one vendor's app all day. Kling's own subscription gets new Kling features first.
How we checked this
We read OpenAI's Sora discontinuation article and API deprecations page, Kling's Kling 3.0 page, Kling 4.0 release note and Kling 4.0 vs 3.0 comparison, and Runway's pricing page, API pricing page and Gen-4.5 API page, all on October 25, 2026. Some of these pages block automated requests, so we read their text through a reader proxy. Kling's developer pricing page did not load. Oakgen facts come from the Kling v3 Pro model config and Oakgen's pricing code on the same date. We did not run these models side by side for this article.
Try Kling v3 Pro on Oakgen
Make a 3 to 15 second clip with native audio and see the credit cost before you generate.
Related reading
Frequently asked questions
Is Sora 2 still available?
No. OpenAI's help center says the Sora web and app experiences were discontinued on April 26, 2026, and OpenAI's API deprecations page lists the Videos API, sora-2 and sora-2-pro as removed on September 24, 2026, with no replacement named. You can still export old Sora content from sora.chatgpt.com/sunset.
Is Kling better than Runway?
For generating clips from a prompt, Kling has the longer limits on its own pages: 3 to 15 seconds with native audio on Kling 3.0, against Runway's Gen-4.5, which its API lists at 720p and 12 credits a second. Runway is the better fit if you edit existing footage, since its Aleph 2.0 model is built for that, and Runway also hosts Kling 3.0 inside its own app.
What is the difference between Kling 3.0 and Kling 4.0?
Kling's own comparison, read on October 25, 2026, lists 3 to 15 seconds, 8-bit SDR and single-channel audio for Kling 3.0, and 3 to 30 seconds, 10-bit HDR at 1080p and 4K, two-channel stereo and up to 10 keyframes for Kling 4.0. Kling says the full 4.0 model launches in October 2026. Oakgen offers Kling v3 Pro, not Kling 4.0.
How much does Kling cost on Oakgen?
Kling v3 Pro costs 57 credits per second with audio on and 38 credits per second with audio off, so a 5-second clip is 284 or 190 credits, according to Oakgen's pricing code on October 25, 2026. Clips run 3 to 15 seconds. The generator shows the exact cost before you run it.
How much does Runway Gen-4.5 cost?
Runway's pricing page, read on October 25, 2026, says Gen-4.5 uses 12 credits per second, so a 5-second clip is 60 credits. The Standard plan is $15 a month for 625 credits, or $12 a month billed yearly. Runway's API sells credits at $0.01 each, which makes Gen-4.5 $0.12 per second there.
Did Oakgen test Kling, Runway and Sora side by side?
No. This comparison uses each vendor's published limits and prices, read on October 25, 2026, and Oakgen's own model configs and pricing code. It tells you which tool fits which job on paper, not which output looks best.
