Open Model WeightsPIKA LABS · FIELD VERIFIED
Primary sources last checked on 4 Nov 2026. Verification freshness is tracked separately from factual change, and unknown values remain explicit rather than inferred.
CONCEPTUAL MODEL BRIEF · ORIGINAL ILLUSTRATION
A topic-specific editorial visual, not an independent model performance measurement.MODEL INTELLIGENCE · SOURCE-FIRST
Open Model Weights records Pika H3 Flex as a 33.123B-parameter text, images → video and audio open-weight model in the Pika H3 Flex family, with Pika Labs listed as the developer. The checked source repository provides 27 recognized weight artifacts, format evidence for Safetensors and a context window that is not declared in the checked standard sources. Values that are not evidenced in the checked sources remain explicitly undisclosed or unknown.
The repository declares other. Commercial-use classification requires license-specific review. Open Model Weights reports the checked license evidence and classification; this is not legal advice.
The checked sources declare MiniMaxAI/MiniMax-H3 as lineage evidence. Training recipe status: not-disclosed-in-checked-repository; data disclosure status: not-disclosed-in-standard-metadata-or-obvious-model-card-section.
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DIRECT ANSWER · FEATURED MODEL BRIEFING
Source-grounded editorial layer · reviewed 2026-11-04
Pika H3 Flex is a six-step video-and-audio generation adapter package built on MiniMax-H3, not a separate new foundation model. The repository publishes matching LoRA Safetensors and base components under a custom license that requires separate rights review. Open Model Weights independently inspected the exact repository revision, listed weight artifacts and declared license; it has not run the model or reproduced publisher benchmark results. The repository includes a separately checked license file.
WHY IT MATTERS
Pika distributes rank-128 FL2VA and Ref2VA LoRA adapters for different MiniMax-H3 transformer partitions. The exact configuration and operational assumptions should be checked against the source model card rather than assumed from the name alone.
The primary source carries custom non-Apache license conditions; commercial status is unknown in automatic verification. The exact configuration and operational assumptions should be checked against the source model card rather than assumed from the name alone.
Publisher descriptions cover six-step native 480p or 768p local generation; higher resolutions belong to a hosted API. The exact configuration and operational assumptions should be checked against the source model card rather than assumed from the name alone.
MODEL-SELECTION VIEW
Pika distributes rank-128 FL2VA and Ref2VA LoRA adapters for different MiniMax-H3 transformer partitions. The exact configuration and operational assumptions should be checked against the source model card rather than assumed from the name alone.
The repository Pika-Labs/Pika-H3-Flex was checked at commit 3ff166447d5edb1406107ab8370c42000ce173e4. This evidence establishes a real published weight distribution, but no independent user task or hardware benchmark was performed by Open Model Weights.
The repository exposes public Safetensors but some files are bundled base model components, not newly trained Pika base weights. The exact configuration and operational assumptions should be checked against the source model card rather than assumed from the name alone.
The published weight manifest and associated processor or tokenizer components must be pinned to 3ff166447d5edb1406107ab8370c42000ce173e4 to avoid silently mixing revisions. Converted quantizations and separately licensed dependencies are outside an automatic equivalence guarantee.
The primary source carries custom non-Apache license conditions; commercial status is unknown in automatic verification. The exact configuration and operational assumptions should be checked against the source model card rather than assumed from the name alone.
The exact repository license identifier is other. Commercial-use clearance is recorded only as supported by checked source metadata and text; third-party assets, deployment software, encoders and data sources retain their own terms.
Publisher descriptions cover six-step native 480p or 768p local generation; higher resolutions belong to a hosted API. The exact configuration and operational assumptions should be checked against the source model card rather than assumed from the name alone.
Publisher benchmarks are useful context but depend on their chosen prompts, hardware, code revision and comparison conditions. Open Model Weights does not claim to have reproduced any reported ranking or speed figure.
The adapters depend on matching MiniMax-H3 components, modular Diffusers paths and large storage requirements. The exact configuration and operational assumptions should be checked against the source model card rather than assumed from the name alone.
Actual deployment of Pika H3 Flex Video Adapters requires consistent model code, configuration, runtime, security permissions and memory budget. Do not infer general usability solely from public downloads or parameter count.
IMPLEMENTATION & EVALUATION
Reproducible operator checklist; these steps are not claims of an OMW model run.
A named model does not guarantee identical checkpoint revisions.
Record 40-character SHA, original file names, configuration and tokenizer/processor versions.
Unpinned revisions can silently change weights or usage requirements.
A specialist checkpoint can fail outside the publisher's demonstrated conditions.
Document actual prompt templates, modality preprocessing, inference backend and compatible software versions.
Using unsupported serving backends can invalidate comparisons.
Model card labels and code licenses are not automatically permission for every deployed use.
Check exact weight terms, notices, tool permissions, data privacy and runtime isolation.
Restricted weight rights or unsafe action tools can make a deployment unsuitable.
Vendor benchmark figures are useful evidence, but are not OMW-run observations.
Pre-register held-out tasks and compare baseline checkpoint, hardware, quality, memory and error rates.
Attributing first-party results to independent inference would mislead readers.
Proposed tests, not OMW benchmark results. Read the official model card at the pinned source revision ↗ Inspect OMW field evidence ↗
PRIMARY & INDEPENDENT SOURCES
FAQ
Pika distributes rank-128 FL2VA and Ref2VA LoRA adapters for different MiniMax-H3 transformer partitions. The official checkpoint must be distinguished from third-party conversions and derivatives.
Yes. Exact public Safetensors were found in Pika-Labs/Pika-H3-Flex at the pinned source revision. External dependencies may have different access conditions.
The primary source carries custom non-Apache license conditions; commercial status is unknown in automatic verification. The source verifier only records evidenced permissions and does not issue legal clearance.
Publisher descriptions cover six-step native 480p or 768p local generation; higher resolutions belong to a hosted API. OMW has not run a separate evaluation.
The adapters depend on matching MiniMax-H3 components, modular Diffusers paths and large storage requirements. Operators should verify compatible software and isolate external tools.
Test reference preservation, motion coherence, stereo audio, hardware cost and component license boundaries. No unperformed independent speed or quality measurement is claimed.
03 · PRACTICAL TECHNICAL PROFILE
Inspect weight-memory estimates, model lineage and runtime evidence separately from promotional or untested performance claims.
DEPLOYMENT PROFILE
These bars visualize weight-only decimal-GB estimates. They exclude KV cache, activations, runtime overhead, optimizer state and sharding.
LICENSE & USE
Commercial-use classification requires license-specific review
This section summarizes the checked repository evidence. It is not legal advice. Inspect license evidence ↗
LINEAGE & PROVENANCE
Open Model Weights does not infer a hidden base model or training corpus when the checked sources do not declare one.
RUNTIME SIGNALS
Declared and model-card-mentioned runtimes are discovery signals. They are not treated as Open Model Weights runtime tests unless explicitly measured.
EVIDENCE TRAIL
This is where the article remains auditable: source links on one side, the registry's observed change history on the other.
Official Hugging Face repository SHA unchanged; prior field evidence retained.
Checked Hugging Face API metadata, exact repository file list, model card and config when accessible.
04 · EVIDENCE AND UPDATES
Inspect dated source checks and any differences between published claims and the evidence; these checks are not independent model benchmarks.
FRESHNESS & VERIFICATION
A verification check does not pretend the model changed. Open Model Weights updates the verification date after a real primary-source check, while factual-update dates move only when retained source evidence changes.
CONFLICT INTELLIGENCE
05 · SOURCE RECORD
Full repository-level attributes, licensing, format details and provenance are available below without hiding or rewriting the original data.
01 · WEIGHTS
audio_vae/diffusion_pytorch_model.safetensorscomfy/loras/pika_h3_flex_fl2va_comfy_bf16.safetensorscomfy/loras/pika_h3_flex_ref2va_comfy_bf16.safetensorsfl2va/adapter.safetensorsref2va/adapter.safetensorstext_encoder/model-00001-of-00002.safetensorstext_encoder/model-00002-of-00002.safetensorstext_encoder/model.safetensors.index.jsontransformer/diffusion_pytorch_model-00001-of-00007.safetensorstransformer/diffusion_pytorch_model-00002-of-00007.safetensorstransformer/diffusion_pytorch_model-00003-of-00007.safetensorstransformer/diffusion_pytorch_model-00004-of-00007.safetensorstransformer/diffusion_pytorch_model-00005-of-00007.safetensorstransformer/diffusion_pytorch_model-00006-of-00007.safetensorstransformer/diffusion_pytorch_model-00007-of-00007.safetensorstransformer/diffusion_pytorch_model.safetensors.index.jsontransformer_ref/diffusion_pytorch_model-00001-of-00007.safetensorstransformer_ref/diffusion_pytorch_model-00002-of-00007.safetensorstransformer_ref/diffusion_pytorch_model-00003-of-00007.safetensorstransformer_ref/diffusion_pytorch_model-00004-of-00007.safetensorstransformer_ref/diffusion_pytorch_model-00005-of-00007.safetensorstransformer_ref/diffusion_pytorch_model-00006-of-00007.safetensorstransformer_ref/diffusion_pytorch_model-00007-of-00007.safetensorstransformer_ref/diffusion_pytorch_model.safetensors.index.jsonvae/diffusion_pytorch_model-00001-of-00002.safetensorsvae/diffusion_pytorch_model-00002-of-00002.safetensorsvae/diffusion_pytorch_model.safetensors.index.json02 · LICENSE
Classification describes the checked license terms; it is not legal advice.
License / model-card evidence ↗03 · HARDWARE
Weight-only decimal-GB estimate from total parameter count; excludes KV cache, activations, runtime overhead, optimizer state and sharding.
04 · FORMATS
“Not observed” means no matching repository artifact/name/dtype signal was found; it does not prove no third-party conversion exists.
05 · LINEAGE
06 · TRAINING ASSETS
07 · RUNTIME SUPPORT
Open Model Weights separates model-repository evidence from external runtime-release evidence. An external support statement does not change the official model repository's weight formats and does not imply an Open Model Weights inference benchmark.
08 · SOURCES
09 · VERIFICATION HISTORY
Official Hugging Face repository SHA unchanged; prior field evidence retained.
Checked Hugging Face API metadata, exact repository file list, model card and config when accessible.