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Pika H3 Flex
Turn a written scene into a 5–15s MP4 where picture, voice and score land together. Pika H3 Flex works entirely online — nothing to install.
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Meet the Pika H3 Flex engine
Its sampler draws sound and image in the same pass; we host it, so all you need is a browser tab.
- A fresh training run on MiniMax H3Released October 29, 2026, this build needs only six sampling steps to deliver 24 fps clips of 5–15 seconds with stereo sound mixed in.
- Start from words or a still frameFeed it a prompt, an opening image, an ending frame, or a pair — enough to bring a photo to life or connect two scenes.
- Runs in the cloud, not on your GPUOwn the hardware? The LoRA weights sit on a 33B base and load in ComfyUI. Otherwise the model runs server-side while you watch from any browser.
Three steps from idea to finished MP4
Every render follows the same short path — write it, configure it, save it.
What Pika H3 Flex brings to a render
Six traits that decide how a finished clip looks, sounds and costs.
Audio generated alongside the frames
Dialogue, music, sound effects and ambience come out of the same pass as the visuals, so no manual alignment is needed.
Fast sampling means more attempts
Because each pass is quick, you can try three or four variations of one beat and keep the best rather than settling for the first.
Draft cheap, finish sharp
Test an idea at 480p or 768p, then push the winner to 1080p, 2K or 4K — sound and frame rate carry over untouched.
A ratio for every screen
Choose 21:9, 16:9, 1:1, 4:3, 3:4 or 9:16 up front, so a single shot suits a widescreen cut, a square post or a vertical short.
Optional prompt enhancer
Leave the enhancer on and a few words get fleshed out; turn it off and a long, specific prompt is obeyed word for word.
Credits back on failed runs
If a job errors, times out or is blocked by moderation, the credits go straight back — only completed videos are billed.
Common questions about Pika H3 Flex
Model background, pricing, clip length and running it yourself — answered in plain terms.
What is Pika H3 Flex, and when was it released?
A retrained MiniMax H3 model from Pika, released October 29, 2026. It samples in six steps, outputs 5–15 second clips at 24 fps with stereo sound generated in the same pass, and ships with open LoRA weights.
Is this the official Pika site?
No — this is an independent studio that runs the model in your browser, adding credits, automatic refunds and a download history. It has no affiliation with Pika Labs or MiniMax.
What does a single video cost in credits?
Billing is per second — 480p at 2 credits, 768p at 4, 1080p at 7, 2K at 8 and 4K at 16. A five-second 768p render comes to 20 credits; a fifteen-second 4K one to 240, shown before you start.
What is the maximum clip length?
Every render runs 5, 10 or 15 seconds at 24 fps; longer sequences are assembled from multiple generations, shot by shot.
Can I install it locally with ComfyUI?
You can — the LoRA weights load onto the 33B base in ComfyUI or diffusers. Be aware a five-second 480p clip asks for roughly 66–69 GiB of VRAM and 211 GB of storage, which is why most people use the hosted version.
How do I get a character to speak with matching lip sync?
Quote the exact line, name who says it, then list voice, ambience and effects after Sound:. Speech and mouth movement are produced as one.
Make your first Pika H3 Flex video
Write the scene and its audio, choose 5, 10 or 15 seconds, and save an MP4 with sound already matched. There is no free tier — plans start at $9.90 one-time or $11.90/mo billed yearly, and failed renders are refunded.