Predict the complex.
Can a model place proteins, ligands and nucleic acids into a plausible 3D assembly?
Modern drug discovery is no longer one structure model or one docking score. Compare complex predictors, affinity-aware models, protein generators, sequence designers and AI docking systems by the scientific role they can actually support.
AlphaFold 3, Chai-1 and early Boltz lineages made multimodal complex prediction mainstream. Newer systems add affinity signals, generative protein design, sequence optimization, hit-discovery pipelines and agent-accessible compute.
Can a model place proteins, ligands and nucleic acids into a plausible 3D assembly?
Can multiple models generate molecules, estimate interaction evidence and survive independent structural, docking, physics and experimental challenge?
A protein generator should not be compared to a pose predictor as if both emitted the same kind of evidence. The atlas keeps task, input, output and boundary explicit.
What 3D assembly is plausible?
AlphaFold 3 · Chai-1 · Boltz-2.1 · Protenix-v2Which interactions deserve stronger follow-up?
Boltz-2.1 · interaction-aware ranking layersWhat new binder or scaffold should be proposed?
Chai-2/3 · BoltzProt-1 · RFdiffusion3Which amino-acid sequence fits the structural hypothesis?
ProteinMPNN · LigandMPNNWhat chemistry should be generated or screened?
BoltzMol-1 + medicinal-chemistry generatorsDo independent docking models agree on geometry?
DiffDock · CarsiDock · SurfDock · classical dockingSearch by scientific task, model family, access route or role. Select up to four models to compare inputs, outputs, strengths and failure boundaries side-by-side.
Joint structure + binding prediction
Protein / nucleic-acid / small-molecule complexes
3D structures, confidence and binding metrics
Best role: A single accessible route for complex prediction plus affinity-oriented outputs.
Boundary: Predicted binding metrics are model evidence, not measured affinity and not a substitute for orthogonal physics or assay data.
Small-molecule hit discovery
Target context + molecular-design constraints
Designed / screened small-molecule candidates
Best role: Integrated hit-discovery workflow tied to the Boltz structure/affinity family.
Boundary: Experimental hit campaigns are not equivalent to prospective performance on a new target; target-specific validation is required.
De novo protein and nanobody design
Target structure / interaction context
Designed protein candidates + interaction-oriented ranking
Best role: End-to-end protein design with dedicated interaction scoring in the same product family.
Boundary: Generation and ranking should remain separate evidence objects; model ranking is not measured binding.
Advanced molecular design
Platform-defined therapeutic design context
Designed therapeutic hypotheses
Best role: Latest Chai platform generation for partner molecular-design workflows.
Boundary: Public technical detail is more limited than for open models; BioAtlas should separate platform claims from independently reproducible evidence.
Structure prediction + biomolecular design
Proteins, complexes, antibodies and ligand-related contexts
Predicted structures and design hypotheses
Best role: Open model family spanning structure prediction and newer biomolecular design workflows.
Boundary: Developer-reported design hit rates and benchmark gains are task-specific and should remain attached to their exact protocols.
De novo antibody and binder design
Target sequence/structure, framework/format and epitope constraints
Designed antibodies / binders
Best role: Zero-shot biologics design with controllable antibody formats and target context.
Boundary: Generative-design success claims are not interchangeable with structure-prediction benchmarks; experimental validation remains decisive.
All-atom protein design
Protein, ligand, nucleic-acid and atom-level constraints
Designed protein structures / backbones in molecular context
Best role: Atom-level conditional design for binders, enzymes and nucleic-acid interfaces.
Boundary: RFD3 is a structural generator; sequence redesign and downstream filtering may still require MPNN-style methods and independent validation.
Multimodal biomolecular complex
Protein, nucleic acid, ligand and complex context
3D complex structures + confidence
Best role: Broad complex-structure baseline and ecosystem reference point.
Boundary: Structure confidence is not binding affinity, potency, selectivity or experimental proof.
Protein–ligand docking and pose refinement
Protein pocket + ligand
Predicted bound poses
Best role: Independent learned docking evidence for pose convergence studies.
Boundary: Pose convergence across learned dockers is stronger evidence than one pose, but still not experimental confirmation.
Multimodal complex prediction
Proteins, ligands, nucleic acids, multimers, optional restraints
Predicted biomolecular complexes + confidence
Best role: Independent complex-prediction challenger with a distinct model lineage.
Boundary: Chai-1 prediction evidence should not be conflated with Chai-2/3 generative-design claims.
Sequence design conditioned on ligand / molecular context
Protein structure + ligand or interaction context
Designed protein sequences
Best role: Sequence optimization when the target design is explicitly conditioned on non-protein context.
Boundary: Use alongside structural and biophysical checks rather than treating sequence likelihood as functional proof.
Protein–ligand complex structure
Protein sequence / structure context + ligand
Protein–ligand complex poses
Best role: Independent learned complex-prediction evidence outside the AF3/Boltz/Chai lineages.
Boundary: Pose plausibility does not establish biochemical affinity or medicinal-chemistry quality.
All-atom biomolecular assembly prediction
Proteins and non-protein molecular context
All-atom structural hypotheses
Best role: A structurally distinct all-atom lineage useful as an independent challenger.
Boundary: Do not treat cross-model agreement as independence if models share training data, templates or related structural priors.
Surface-aware protein–ligand docking
Protein surface / pocket + ligand
Candidate complex poses
Best role: Geometric surface-aware alternative for challenging docking comparisons.
Boundary: Use as a complementary pose hypothesis generator, not an isolated affinity oracle.
Protein–ligand pose prediction
Protein structure + ligand
Candidate ligand poses + confidence
Best role: Fast learned pose generation as an orthogonal challenger to classical docking.
Boundary: Docking confidence is not a free-energy estimate and should not be used alone to rank biological potency.
Protein sequence design for fixed/backbone-conditioned structures
Protein backbone / structural context
Designed amino-acid sequences
Best role: Efficient sequence design after a structural generator proposes a backbone.
Boundary: Sequence recovery and structural compatibility do not establish expression, stability, function or therapeutic developability.
Use independent model families to generate and challenge hypotheses, then add physics and experiment as different evidence classes rather than averaging everything into one opaque score.
Is this model valid for the exact molecular task?
Do structurally different models support the same hypothesis?
Does docking / MD / free-energy evidence contradict the learned model?
Are limitations, uncertainty and next experiment explicit?
The useful stack is not “replace physics with AI.” It is complementary learned models → independent structural / pose challenge → physics where justified → experiment.
Structure accuracy, pose accuracy, affinity prediction, binder hit rate and sequence recovery answer different questions. Cross-paper headline numbers should not be treated as directly comparable unless dataset, split, metric, protocol and target domain align.
A convincing complex can still have the wrong energetic ranking.
Expression, stability, specificity and manufacturability remain separate gates.
Model confidence or docking score should not be read as measured biology.
Related models may share data, templates or architectural priors.
BioAtlas preserves model identity, exact role, public evidence and limitations. BayesARC can use those qualified model choices inside programme workflows without pretending any single prediction is experimental truth.