AI Video Model Comparison
Compare provider-documented limits and locally verified Seedance settings without turning unlike credits or marketing claims into a false winner. Runway facts on this page come only from Runway public documentation.
Duration: Seedance 2.5 is provider-described at up to 30 seconds; Runway Gen-4.5 is provider-described at 2–10 seconds.
Resolution: AISeedance25 exposes verified 480p and 720p Seedance output; Runway documents 720p Gen-4.5 output.
References: ByteDance describes up to 50 multimodal inputs; Runway documents text or text-plus-image Gen-4.5 inputs.
Free access: AISeedance25 has no free signup credits; its $15 trial pack covers three Seedance 2.5 720p 5-second videos. Runway documents 125 one-time Free-plan credits, while Gen-4.5 requires Standard or higher.
Every cell carries an evidence label. Runway cells are never presented as independently verified by AISeedance25.
| Dimension | Seedance 2.5 | Runway |
|---|---|---|
| Maximum single-generation duration | Up to 30 seconds· provider-described | 2–10 seconds in Gen-4.5· provider-described |
| Native output resolution | 480p / 720p✓ verified | 720p in Gen-4.5· provider-described |
| Base video inputs | Text, image, video and audio references· provider-described | Text for Text to Video; text and one input image for Image to Video· provider-described |
| Reference workflow | Up to 50 multimodal inputs· provider-described | Gen-4.5 supports Image to Video; broader Gen-4 References is an image workflow and supports up to three references· provider-described |
| Frame rate | 24 fps✓ verified | 24 fps or 25 fps in Gen-4.5· provider-described |
| Starting allowance | No free credits; $15 one-time trial pack (3,000 credits, one per account)✓ verified | 125 one-time Runway Free-plan credits; Gen-4.5 requires Standard or higher· provider-described |
| Independent verification on this site | AISeedance25 operates a Seedance 2.5 integration✓ verified | Not independently verified by AISeedance25· provider-described |
Use the same shot brief, duration target and framing. The generator shows its credit estimate before submission. Model project retries in the Seedance Cost Calculator.
Resolution
Aspect ratio
Duration
5s
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| Scenario | Better pick | Reason |
|---|---|---|
| A single continuous shot longer than 10 seconds | Seedance 2.5 | Its provider-documented single-generation ceiling reaches 30 seconds. |
| A 2–10 second 720p shot with 24/25 fps selection | Runway Gen-4.5 | Runway documents those exact Gen-4.5 controls; confirm current access in your account. |
| A reference-heavy multimodal brief | Seedance 2.5 | ByteDance describes up to 50 image, video, audio and other reference inputs. |
| Choosing only by output quality | Run a matched-prompt test | Published specifications cannot establish which model better fits a particular shot. |
| Choosing only by price | Verify both providers first | This comparison does not publish a cross-provider price conclusion without matched first-party rates. |
Seedance 2.5 is ByteDance Seed's audio-video generation model. ByteDance describes up to 30-second generation, multimodal reference control and editing capabilities. AISeedance25 exposes text, image, video and audio-reference workflows through an independent provider-backed integration.
Read the Seedance 2.5 GuideRunway describes Gen-4.5 as supporting Text to Video and Image to Video with 2–10 second duration, 720p output and 24/25 fps controls. AISeedance25 does not operate a Runway integration and cannot independently verify Runway's published specifications.
Runway facts on this page come from its public documentation for Gen-4.5, Free-plan access, and Gen-4 Image References. Seedance provider claims are checked against the ByteDance Seed model page. Provider documentation can change; re-check it before a production commitment.
There is no evidence-based universal winner. Seedance 2.5 has the longer provider-documented single-generation ceiling and broader multimodal reference claim. Runway Gen-4.5 documents 720p output, 2–10 second duration, and selectable 24 or 25 fps. Choose by the requirements of the shot and run a matched-prompt test.
Seedance 2.5 is provider-described at up to 30 seconds in one generation. Runway documents 2–10 seconds for Gen-4.5. These are provider specifications, not a claim that every long prompt will preserve quality or continuity equally well.
The AISeedance25 Seedance 2.5 route exposes 480p and 720p, while Runway documents 720p output for Gen-4.5. Runway also offers upscale workflows on eligible plans, but an upscale is not the same claim as native generation resolution.
ByteDance describes Seedance 2.5 as accepting up to 50 multimodal inputs. Runway Gen-4.5 documents text input for Text to Video and text plus an image for Image to Video. Runway also documents up to three references in its separate Gen-4 Image References workflow.
Runway documents 125 one-time credits on its Free plan, but its Gen-4.5 guide lists Standard and higher as the plan requirement. Runway also states that Free-plan model availability can change, so confirm the model selector in your own account.
No. AISeedance25 does not operate a Runway integration and cannot independently verify Runway outputs or current account-level availability. Every Runway specification on this page is provider-described from Runway public documentation.
This page does not make a cheaper-model claim. The two platforms use different credits, plans, access rules and generation settings. Compare current first-party quotes for the same duration, resolution and workflow before making a cost decision.
Use the same shot brief you would test in Runway, review the Seedance quote before submission, and compare the completed files against your actual production requirements.
Test Seedance 2.5Review the testing methodology, the Seedance resolution guide, and current Seedance pricing before making a production decision.
