Chai Discovery vs Latent Labs (2026)
Both offer AI de novo antibody design as a product a research team can use, with published models and open validation, which sets them apart from the many shops in this field that sell through partnership agreements alone. Chai Discovery licenses foundation models across three published generations, released its structure model Chai-1 with open weights, and lets a customer specify target, epitope and format, including monoclonal and VHH, with design for agonism, antagonism and species cross reactivity. Latent Labs runs a browser platform and an API with a free daily quota and paid credits, publishes technical reports across antibodies, nanobodies and macrocyclic peptides including a ten donor immunogenicity panel, and adds an agent that runs a full campaign from a written goal. Chai is the one for a team that wants a published, improving model to design across many targets. Latent is the one for a team that wants a free tier to start and an agent to run campaigns end to end.
- Foundation models across three published generations, with an open weights structure model.
- Customer control over target, epitope and format, including agonism, antagonism and species cross reactivity.
- Published design results across dozens of antigens.
- A platform and API with a free daily quota and paid credits for larger campaigns.
- Technical reports across antibodies, nanobodies and macrocyclic peptides, with a ten donor immunogenicity panel.
- An agent that runs a whole design campaign from a written goal.
This comparison is published by AI Health Index, an independent research platform that compares healthcare AI vendors objectively. Chai Discovery and Latent Labs are each graded against the same capability taxonomy, from each vendor's own public materials and the regulatory record, under the AI Health Index verification standard. No vendor pays for placement, and no vendor has reviewed this page. How this evidence is graded
Plain facts
| Fact | Chai Discovery | Latent Labs |
|---|---|---|
| Primary category | Drug Discovery AI | Drug Discovery AI |
| Founded | 2024 | Not recorded |
| Headquarters | San Francisco, California | London, United Kingdom |
| Website | chaidiscovery.com | latentlabs.com |
Side by Side
Each record in one paragraph
Written to be quoted whole. Each paragraph states what the AI Health Index verified about the vendor, with the caveats attached. Generated from this pair’s live capability grades, so it moves when a grade moves.
The AI Health Index awards Chai Discovery its top capability grade on AI Centrality, AI Governance and Bias Disclosure and Setting and Specialty Coverage. Set against Latent Labs, Chai Discovery grades higher on AI Governance and Bias Disclosure and Setting and Specialty Coverage. Its thinnest published disclosure sits on Security Certifications and Trust Center and EHR and Interoperability Depth. Grades reflect evidence the AI Health Index could verify at the last review, so a low grade records disclosure the vendor has not published rather than a capability it has been shown to lack.
Source: AI Health Index, October 2026
The AI Health Index awards Latent Labs its top capability grade on AI Centrality. Set against Chai Discovery, Latent Labs grades higher on AI Safety and PHI Stewardship and Commercial Transparency. Its thinnest published disclosure sits on Security Certifications and Trust Center and EHR and Interoperability Depth. Grades reflect evidence the AI Health Index could verify at the last review, so a low grade records disclosure the vendor has not published rather than a capability it has been shown to lack.
Source: AI Health Index, October 2026
Questions buyers ask
Should we choose Chai Discovery or Latent Labs?
On the axes where the AI Health Index separates them, Chai Discovery grades higher on AI Governance and Bias Disclosure and Setting and Specialty Coverage, and Latent Labs grades higher on AI Safety and PHI Stewardship and Commercial Transparency. Neither leads on the greater share of scored axes, so the decision turns on which constraint is binding rather than on an overall winner.
Where do Chai Discovery and Latent Labs differ most?
The widest separation the AI Health Index records between Chai Discovery and Latent Labs is on AI Governance and Bias Disclosure, where Chai Discovery grades A and Latent Labs grades B. That axis sits in the Regulatory and Compliance group, so it should carry the most weight for a buyer whose binding constraint is where regulatory exposure sits and who carries it.
Where do Chai Discovery and Latent Labs grade the same?
The AI Health Index grades Chai Discovery and Latent Labs the same on several axes, including AI Centrality, Autonomy and Oversight Model and Model and Technology Transparency. Neither holds an advantage the index can evidence on those axes, so they should not carry weight in a selection between these two.
What have Chai Discovery and Latent Labs not disclosed?
At the last review, at least one of Chai Discovery and Latent Labs published thin or absent detail on Security Certifications and Trust Center and EHR and Interoperability Depth. The AI Health Index treats an absent disclosure as a gap in the public record rather than a failure of the product, so these are the axes to get in writing during diligence instead of inferring from the grade.
Related comparisons
Other published head to head assessments involving these vendors or their closest peers. The full set for this category is on the Drug Discovery AI page.
Both records were reviewed in October 2026. Chai sells model access through agreements; Latent offers a free tier with paid credits and partnerships. Both post technical reports rather than peer reviewed papers.
Ask both for design success rates with denominators on targets like yours, and how each handles the targets where the model comes up empty.