Hedra vs Elyumfor Grok Imagine 1.5
Hedra prices Grok Imagine from 2.14 cents as an image model; Elyum sells 1 to 15s video at 6 credits/second and charges only on keep.
Grok Imagine 1.5 is xAI's video model for short, stylised clips that come back fast. It is the usual pick for 15-second social story beats, not a long photoreal render. Image-to-video stays close to the still, including lighting and detail. Native audio (sound effects, ambience, dialogue) generates in the same pass, and xAI's June 2026 Video 1.5 update targeted clearer speech that lands on the action plus fewer warps over the clip. On Elyum you can run text to video, image to video, and reference to video, in clips from 1 to 15 seconds, with three aspect ratios.
Hedra's Grok Imagine model page lists an xAI image model from 2.14 cents per generation, not confirmed as version 1.5 or as video. Elyum sells Grok Imagine 1.5 as 1 to 15s video at 6 credits per second and charges only on keep. Hedra's Hedra pricing page starts at $15/mo (Basic, 1,500 credits) with no monthly rollover. Elyum plans and credits start Free (up to 150 credits once (our algorithm may grant them), no card) and Plus at $9/mo. Elyum refunds a kill in full. Hedra's refund terms were not independently confirmed, and Trustpilot reviewers have reported charges on artifacted output.
One more gap: Elyum has no timeline editor, no stock footage, no talking-head avatars of its own, and no team seats. Hedra's Character-3 is the reason many people open Hedra in the first place. If you need a lip-synced portrait from a still plus audio, that is Hedra's job, not Elyum's. If you need Grok Imagine 1.5 next to Seedance or Wan in one credit balance, use the Elyum models catalog.
Grok Imagine 1.5 on Hedra
Hedra lists Grok Imagine on its image catalog from 2.14 cents per generation (standard). The listing is not confirmed as version 1.5 and not confirmed as a video model. Hedra does not publish a per-second Grok Imagine 1.5 video rate, and does not publish a plan that uniquely unlocks the model. Paid plans start at Basic ($15/mo, 1,500 credits, slower generations, commercial use). Creator is $30/mo and 5,400 credits. Professional and Teams are $75/mo and 14,400 credits. Free is 100 one-time credits. Third-party reviews say free output is watermarked and not licensed for commercial use.
A bad render on Hedra is the unclear part. Hedra has a documented Generation History & Credit Refunds page, but the exact terms were not independently fetched. A Trustpilot reviewer wrote that credits were charged even when the resulting video had visible artifacts, and that refund requests went unanswered for a long time. Monthly subscription credits expire each billing cycle. Add-on packs are reported by a third-party review to persist (not independently confirmed). Hedra also publishes API v3 and an MCP server. See the Hedra alternative page for the wider studio comparison.
Grok Imagine 1.5 on Elyum
On Elyum, Grok Imagine 1.5 is video: text to video, image to video, and reference to video, clips from 1 to 15 seconds, three aspect ratios. The rate is 6 credits per second. A kept 5s take is 30 credits ($0.30). A kept 15s take is 90 credits ($0.90). 1 credit equals $0.01. Every render comes back as a free preview. You keep the takes you want (that is the only charge) or kill the rest for a full refund. A failed generation is never charged. Free allows one kill a month; Plus, Pro, and Ultra kill freely. Kept downloads are full quality with no watermark, and commercial use is included.
You can run it from the web studio or from Claude, ChatGPT, and Cursor through Elyum's MCP server and a REST API. The same credit balance covers 50+ models. If you are comparing other video models on both studios, see Hedra vs Elyum for Seedance 2.5 or Hedra vs Elyum for Wan 3.
What a Grok Imagine 1.5 take costs
| Scenario | Hedra | Elyum |
|---|---|---|
| One 5s take you keep | 2.14 cents per Grok Imagine image generation (standard). Video rate not published. | 5 x 6.4 = 30 credits ($0.30) |
| Ten 5s takes, keep two | 10 x 2.14 cents = 21.4 cents if all image gens bill (refunds unconfirmed) | 2 × 30 credits = 60 credits ($0.60); eight kills refund |
| A failed generation | Refund terms not independently confirmed; Trustpilot reports artifact charges | Never charged |
| Monthly plan to access the model | Free: 100 one-time credits (watermarked, per reviews). Paid from $15/mo Basic. | No. Free plan is up to 150 credits once (our algorithm may grant them), no card. |
| Watermark on the file | Free: watermarked (third-party). Paid plans: no watermark. | None on kept takes |
| One 15s video you keep | Not published as a video model or as a 15s rate | 15 x 6.4 = 90 credits ($0.90) |
Elyum: 1 credit = $0.01, charged only when you keep a take. Hedra figures from its own pricing pages and independent reviews, verified 2026-09-07; sources at the end. Full rate card on the Grok Imagine 1.5 page.
Where the two differ
Hedra lists Grok Imagine as an xAI image model from 2.14 cents per generation. Version 1.5 and video are not confirmed. Elyum lists Grok Imagine 1.5 as video, 1 to 15s, three aspect ratios, text/image/reference to video.
Hedra's published Grok Imagine price is per generation (2.14 cents standard). Elyum bills per second of video kept: 6 credits/second ($0.064/s). Previews on Elyum are free.
Elyum charges only on keep. Kill refunds in full (one kill a month on Free). Failed gens are never charged. Hedra documents a refund page, but exact terms were not confirmed. Trustpilot reviewers reported charges for artifacted video and slow refunds.
Hedra Basic is $15/mo for 1,500 credits that do not roll over. Elyum Free is up to 150 credits once (our algorithm may grant them); Plus is $9/mo. Hedra add-on packs reportedly persist (third-party, not independently confirmed).
Hedra Basic is slower; Creator is faster; Professional and Teams are fastest. Hedra's Character-3 avatar stack has no Elyum equivalent. Elyum has no timeline editor and does not publish a Grok Imagine 1.5 queue speed.
Both publish a developer API and an MCP server. Hedra's API v3 is pay-per-use, separate from subscription credits. Elyum uses the same credit balance in the studio, MCP, and REST API.
Pick Hedra when
- Hedra's Character-3 talking-avatar model is the reason to open Hedra, and independent reviewers rate its lip-sync among the best tested in 2026.
- Hedra lists Grok Imagine from 2.14 cents per image generation, cheaper than Elyum's per-second video rate if a still is what you need.
- Hedra publishes granular API prices and offers API v3 plus MCP behind one key, with a catalog of about 46 video, 35 image, and 12 audio models.
- The free tier is 100 credits, enough for a few test generations before a $15/mo Basic plan.
Pick Elyum when
- Grok Imagine 1.5 is video here: 1 to 15s, text/image/reference, $0.32 for a kept 5s take (5 x 6.4 credits).
- Previews are free. You pay only for keeps. Kills refund in full. Failed generations are never charged.
- Free plan is up to 150 credits once (our algorithm may grant them), no card. Plus is $9/mo versus Hedra Basic at $15/mo.
- Kept files have no watermark and include commercial use. Same credit balance across 50+ models.
Grok Imagine 1.5 in three styles, rendered on Elyum
Getting the most out of Grok Imagine 1.5
- Write for 15 seconds or less. Name one camera move (slow dolly in, handheld track, locked-off) and one motion beat. Stacked moves in a short clip are how faces warp.
- Put the audio in the prompt. Grok Imagine 1.5 generates SFX, ambience, and dialogue with the picture. Write the spoken line and the beat it hits, plus room tone or a sound effect.
- For image-to-video, keep the still's framing and lighting. Prompt only what should move (hair, cloth, a hand, a car). The model holds the still; extra restyling fights it.
- Use reference-to-video when a face, product, or location must hold while action changes. Feed stills of the lock, then describe the new motion, not a new identity.
- Pick one of the three aspect ratios to match the final cut. Do not ask the model to letterbox, add captions, or crop after the fact.
- Stay stylised and short. This model is for look and motion on social beats. Avoid photoreal minute-long plate language and crowded multi-character blocking.
Frequently asked questions
How much does a Grok Imagine 1.5 video cost on Elyum vs Hedra?
Is Grok Imagine 1.5 the same model on both?
What happens to a bad Grok Imagine 1.5 take?
Do I need a subscription to use Grok Imagine 1.5 on Elyum?
Does Hedra watermark Grok Imagine output?
Can I call Grok Imagine 1.5 from an API or MCP?
- Hedra Pricing (accessed 2026-09-07)
- Hedra All Models catalog (accessed 2026-09-07)
- Hedra Video Generation API (accessed 2026-09-07)
- Hedra Veo model page (accessed 2026-09-07)
- Hedra Nano Banana model page (accessed 2026-09-07)
- Hedra Grok Imagine model page (accessed 2026-09-07)
- Hedra Best AI Video Models blog (accessed 2026-09-07)
- Hedra Reviews - Trustpilot (accessed 2026-09-07)
- Hedra AI Review 2026: Pricing, Character-3, and Is It Still Worth It? (fluxnote.io) (accessed 2026-09-07)
- Hedra AI Review 2026: What Holds It Back (lovart.ai, June 2026) (accessed 2026-09-07)
- Hedra Generation History & Credit Refunds docs (accessed 2026-09-07)
Related comparisons
Create everything. Keep the best.
Grok Imagine 1.5 is a AI video generator you can preview free on Elyum. Keep the takes you love, kill the rest for a full refund.