What is the latest version of Chai?

The current shipped version of Chai is 1, as of September 12, 2026.

How much does Chai cost?

Chai has no published flat entry price. Pricing is not publicly disclosed (enterprise/license agreements)

← Science & Bio

Chai

Name: Chai
Author: Chai Discovery

Chai Discovery · #2 most active of 8 in Science & Bio

Compare →

Structure prediction and de novo binder design aimed at drug programs.

Website

Trust score · Mixed

3 data points checked · 2026-09-10

Model stack: DisputedEntry price: DisputedVersion: DisputedHow this works →

Current version

Entry cost

Pricing is not publicly disclosed (enterprise/license agreements)

Changes / 30d

The short answers · verified September 12, 2026

What is the latest version of Chai?: The current shipped version of Chai is 1, as of September 12, 2026.
How much does Chai cost?: Chai has no published flat entry price. Pricing is not publicly disclosed (enterprise/license agreements)
What AI model does Chai use?: Chai runs primarily on Chai-1.

Source: Chai Discovery — www.chaidiscovery.com · Reusable under CC BY 4.0 — cite Tomorrow

Capabilities

De novo binders
Complex prediction
Antibody design
Web tool
drug discovery
molecule design
antibody discovery
molecular design
drug discovery AI
biochemical structure prediction
antibody design
biochemical structure modeling
Molecular design suite
AI-driven antibody discovery
Drug discovery platform
AI drug discovery
Biochemical structure prediction
Molecules design suite
AI-driven drug discovery
biochemical structure learning
molecular design suite
biochemical structure foundation model
structure prediction
biochemical structure foundation models
Molecular Design
Antibody Discovery
Drug Discovery AI
Biochemical Structure Prediction
biochemical structure design
Biochemical interaction modeling
AI-Driven Antibody Discovery
Drug Discovery
Biochemical Structure Modeling
biochemical interaction modelling
Computer-aided design suite for molecules
Drug-like antibody design
Biochemical structure modeling
De novo molecule design
biochemical structure simulation
computer-aided design suite for molecules
biochemical modeling

Pricing

Pricing is not publicly disclosed (enterprise/license agreements)

Entry price over time

1 of 27 points reconstructed from Internet Archive captures (hollow dots) — dated by capture, not by when we first saw the page. View a capture

7/10/2025 · $09/12/2026 · $0

Geek mode

Models under the hood

Chai-1
Chai Discovery
disclosed
Chai-2
Chai Discovery
disclosed

Context window

—

Public API

yes

Multi-model routing

Shared model stack

Other tracked products running on the same foundation models — a quick read on how much of the catalog moves when one of these models changes.

Chai-1Chai Discovery · 1 product
- Chai
Chai-2Chai Discovery · 1 product
- Chai

green disclosed · amber inferred · grey unattributed. Aliases are folded into one model; provider concentration counts only models with an established vendor.

Reported scale

Reference data. Each figure is whatever the source actually said — weekly users, downloads, revenue run-rate — with its own definition and date. These are not comparable between tools and are never used to rank anything.

No public usage figure on record for this product.

Also in Science & Bio

All Science & Bio

Lila Sciences

Lila SciencesUnited States

Autonomous science factories

Version: LILA
Cost: Pricing is not publicly disclosed. Contact Lila Sciences for custom enterprise solutions.
Model: LILA

FutureHouse

FutureHouseUnited States

Agents for scientific literature

Version: Robin
Cost: Free / Non-profit organization building open research tools and hosting a fellowship
Model: Multiple

Boltz

MITUnited States

Open structure prediction

Version: Boltz API
Cost: Pricing is not publicly disclosed (contact sales or try API)
Model: Boltz-2

Altos Labs

Altos LabsUnited States

Cellular rejuvenation research

Version: Cellular Rejuvenation Programming
Cost: Biotech company, not a software product. No commercial software/API pricing.
Model: Proprietary

Xaira Therapeutics

Xaira TherapeuticsUnited States

AI-first drug discovery

Version: X-Atlas/Pisces and X-Cell
Cost: Enterprise/proprietary drug discovery platform, no public pricing or individual tiers
Model: Proprietary

ESM3

EvolutionaryScaleUnited States

Frontier protein language model

Version: ESM3
Cost: Available through the Biohub Platform API, with an open-source version (ESM3-open) available on GitHub.
Model: ESM Cambrian

Change history

Sep 12, 2026first seenversion
Chai moved to 1
Chai-11
source
Sep 11, 2026first seenversion
Chai moved to Chai-1
ChaiChai-1
source
Sep 10, 2026first seencapability
New capabilities: biochemical modeling
40 tracked41 tracked · +biochemical modeling
source
Sep 9, 2026first seencapability
New capabilities: computer-aided design suite for molecules
39 tracked40 tracked · +computer-aided design suite for molecules
source
Sep 8, 2026first seencapability
New capabilities: biochemical structure simulation
38 tracked39 tracked · +biochemical structure simulation
source
Sep 7, 2026first seencapability
New capabilities: Computer-aided design suite for molecules, Drug-like antibody design, Biochemical structure modeling
34 tracked38 tracked · +Computer-aided design suite for molecules, Drug-like antibody design, Biochemical structure modeling, De novo molecule design
source
Sep 6, 2026first seencapability
New capabilities: biochemical interaction modelling
33 tracked34 tracked · +biochemical interaction modelling
source
Sep 4, 2026first seencapability
New capabilities: AI-Driven Antibody Discovery, Drug Discovery, Biochemical Structure Modeling
30 tracked33 tracked · +AI-Driven Antibody Discovery, Drug Discovery, Biochemical Structure Modeling
source
Sep 3, 2026first seenversion
Chai moved to Chai
1Chai
source
Sep 2, 2026first seencapability
New capabilities: Biochemical interaction modeling
29 tracked30 tracked · +Biochemical interaction modeling
source
Aug 31, 2026first seencapability
New capabilities: biochemical structure design
28 tracked29 tracked · +biochemical structure design
source
Aug 30, 2026first seenversion
Chai moved to 1
Chai-11
source
Aug 30, 2026first seencapability
New capabilities: Molecular Design, Antibody Discovery, Drug Discovery AI
24 tracked28 tracked · +Molecular Design, Antibody Discovery, Drug Discovery AI, Biochemical Structure Prediction
source
Aug 27, 2026first seenversion
Chai moved to Chai-1
1Chai-1
source
Aug 26, 2026first seenversion
Chai moved to 1
Chai-11
source
Aug 26, 2026first seencapability
New capabilities: biochemical structure foundation models
23 tracked24 tracked · +biochemical structure foundation models
source
Aug 25, 2026first seenversion
Chai moved to Chai-1
1Chai-1
source
Aug 24, 2026first seenversion
Chai moved to 1
Chai-11
source
Aug 24, 2026first seencapability
New capabilities: structure prediction
22 tracked23 tracked · +structure prediction
source
Aug 22, 2026first seencapability
New capabilities: molecular design suite, biochemical structure foundation model
20 tracked22 tracked · +molecular design suite, biochemical structure foundation model
source
Aug 19, 2026first seenversion
Chai moved to Chai-1
1Chai-1
source
Aug 19, 2026first seencapability
New capabilities: biochemical structure learning
19 tracked20 tracked · +biochemical structure learning
source
Aug 18, 2026first seenversion
Chai moved to 1
Chai1
source
Aug 17, 2026first seencapability
New capabilities: Molecules design suite, AI-driven drug discovery
17 tracked19 tracked · +Molecules design suite, AI-driven drug discovery
source
Aug 16, 2026first seenversion
Chai moved to Chai
Chai-1Chai
source
Aug 16, 2026first seencapability
New capabilities: AI drug discovery, Biochemical structure prediction
15 tracked17 tracked · +AI drug discovery, Biochemical structure prediction
source
Aug 11, 2026first seencapability
New capabilities: Molecular design suite, AI-driven antibody discovery, Drug discovery platform
12 tracked15 tracked · +Molecular design suite, AI-driven antibody discovery, Drug discovery platform
source
Aug 10, 2026first seenversion
Chai moved to Chai-1
1Chai-1
source
Aug 10, 2026first seencapability
New capabilities: antibody design, biochemical structure modeling
10 tracked12 tracked · +antibody design, biochemical structure modeling
source
Aug 9, 2026first seencapability
New capabilities: molecular design, drug discovery AI, biochemical structure prediction
7 tracked10 tracked · +molecular design, drug discovery AI, biochemical structure prediction
source
Aug 8, 2026first seenversion
Chai moved to 1
Chai-21
source
Aug 8, 2026first seenmodel
Chai added Chai-1 to its model stack
Chai-2Chai-1, Chai-2
source
Aug 8, 2026first seencapability
New capabilities: drug discovery, molecule design, antibody discovery
4 tracked7 tracked · +drug discovery, molecule design, antibody discovery
source
Jul 10, 2026first seencapability
New capabilities: artificial intelligence
4 tracked5 tracked · +artificial intelligence
source
May 4, 2026first seencapability
New capabilities: antibody design, drug-like antibody design
3 tracked5 tracked · +antibody design, drug-like antibody design
source
Mar 7, 2026first seencapability
New capabilities: de novo antibody design, artificial intelligence
3 tracked5 tracked · +de novo antibody design, artificial intelligence
source
Feb 18, 2026first seencapability
New capabilities: de novo design, molecular engineering
3 tracked5 tracked · +de novo design, molecular engineering
source
Jan 14, 2026first seencapability
New capabilities: de novo antibody design
3 tracked4 tracked · +de novo antibody design
source
Dec 12, 2025first seencapability
New capabilities: molecular engineering, drug discovery
3 tracked5 tracked · +molecular engineering, drug discovery
source
Nov 18, 2025first seencapability
New capabilities: biology foundation models
3 tracked4 tracked · +biology foundation models
source

Subscribe to Chai changes

Chai compared

Straight head-to-head pages against the busiest products in Science & Bio.

Chai vs Lila Sciences Chai vs FutureHouse Chai vs Boltz Chai vs Altos Labs Chai vs Xaira Therapeutics Chai vs ESM3

How to cite this page

Free to cite and reuse under CC BY 4.0. Permalink: https://tomorrow.aliensquad.ai/tools/chai-discovery

APA

Tomorrow. (2026). Chai — version, pricing and model stack [Data set entry]. AlienSquad. Retrieved 2026-09-13, from https://tomorrow.aliensquad.ai/tools/chai-discovery

BibTeX

@misc{tomorrow-tools-chai-discovery,
  author       = {{Tomorrow}},
  title        = {Chai — version, pricing and model stack},
  year         = {2026},
  publisher    = {AlienSquad},
  howpublished = {\url{https://tomorrow.aliensquad.ai/tools/chai-discovery}},
  note         = {Accessed: 2026-09-13}
}