diff --git a/.changeset/mean-flies-wave.md b/.changeset/mean-flies-wave.md
new file mode 100644
index 0000000000..eecb7e7829
--- /dev/null
+++ b/.changeset/mean-flies-wave.md
@@ -0,0 +1,6 @@
+---
+"@quri/squiggle-lang": patch
+"@quri/squiggle-components": patch
+---
+
+Seeds should be stored for Model Revisions
diff --git a/packages/components/src/lib/hooks/usePlaygroundSettings.ts b/packages/components/src/lib/hooks/usePlaygroundSettings.ts
index 08dd10f04c..d37e5db2a2 100644
--- a/packages/components/src/lib/hooks/usePlaygroundSettings.ts
+++ b/packages/components/src/lib/hooks/usePlaygroundSettings.ts
@@ -1,12 +1,13 @@
 import merge from "lodash/merge.js";
 import { useCallback, useState } from "react";
 
+import { generateSeed } from "@quri/squiggle-lang";
+
 import {
   defaultPlaygroundSettings,
   PartialPlaygroundSettings,
   type PlaygroundSettings,
 } from "../../components/PlaygroundSettings.js";
-import { randomSeed } from "../seedGenerator.js";
 
 export type Args = {
   defaultSettings: PartialPlaygroundSettings;
@@ -41,7 +42,7 @@ export function usePlaygroundSettings({
       ...settings,
       environment: {
         ...settings.environment,
-        seed: randomSeed(),
+        seed: generateSeed(),
       },
     });
   };
diff --git a/packages/components/src/lib/seedGenerator.ts b/packages/components/src/lib/seedGenerator.ts
deleted file mode 100644
index 5a0af1f853..0000000000
--- a/packages/components/src/lib/seedGenerator.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import sample from "lodash/sample.js";
-
-import { seedWords } from "./seedWords.js";
-
-export function randomSeed(): string {
-  return [sample(seedWords), sample(seedWords), sample(seedWords)].join("_");
-}
diff --git a/packages/hub/package.json b/packages/hub/package.json
index fd51912bca..769ab86415 100644
--- a/packages/hub/package.json
+++ b/packages/hub/package.json
@@ -4,6 +4,7 @@
   "private": true,
   "scripts": {
     "db:migrate": "PRISMA_HIDE_UPDATE_MESSAGE=1 prisma migrate deploy",
+    "db:reset": "PRISMA_HIDE_UPDATE_MESSAGE=1 prisma migrate reset",
     "dev": "next dev -p 3001",
     "start": "__NEXT_PRIVATE_PREBUNDLED_REACT=next next start",
     "gen:prisma": "PRISMA_HIDE_UPDATE_MESSAGE=1 prisma generate",
diff --git a/packages/hub/prisma/migrations/20240217215104_squiggle_snippet_seed/migration.sql b/packages/hub/prisma/migrations/20240217215104_squiggle_snippet_seed/migration.sql
new file mode 100644
index 0000000000..25b51cbf73
--- /dev/null
+++ b/packages/hub/prisma/migrations/20240217215104_squiggle_snippet_seed/migration.sql
@@ -0,0 +1,3 @@
+ALTER TABLE "SquiggleSnippet" ADD COLUMN     "seed" TEXT DEFAULT 'DEFAULT_SEED';
+UPDATE "SquiggleSnippet" SET "seed" = 'DEFAULT_SEED' WHERE "seed" IS NULL;
+ALTER TABLE "SquiggleSnippet" ALTER COLUMN "seed" SET NOT NULL;
\ No newline at end of file
diff --git a/packages/hub/prisma/schema.prisma b/packages/hub/prisma/schema.prisma
index 049cdff78a..cdd6023fd6 100644
--- a/packages/hub/prisma/schema.prisma
+++ b/packages/hub/prisma/schema.prisma
@@ -211,8 +211,7 @@ model ModelRevision {
   // optional until we populate old rows after migration
   author   User?   @relation(fields: [authorId], references: [id])
   authorId String?
-
-  comment String @default("")
+  comment  String  @default("")
 
   contentType ModelType
 
@@ -233,6 +232,7 @@ model SquiggleSnippet {
 
   code    String
   version String
+  seed    String
 
   revision ModelRevision?
 }
diff --git a/packages/hub/schema.graphql b/packages/hub/schema.graphql
index 09546eb950..7b1eb05dad 100644
--- a/packages/hub/schema.graphql
+++ b/packages/hub/schema.graphql
@@ -347,6 +347,9 @@ input MutationCreateSquiggleSnippetModelInput {
 
   """Defaults to false"""
   isPrivate: Boolean
+
+  """A unique seed, used for calculation"""
+  seed: String!
   slug: String!
   version: String!
 }
@@ -667,11 +670,13 @@ interface SquiggleOutput {
 type SquiggleSnippet implements Node {
   code: String!
   id: ID!
+  seed: String!
   version: String!
 }
 
 input SquiggleSnippetContentInput {
   code: String!
+  seed: String!
   version: String!
 }
 
diff --git a/packages/hub/src/app/admin/upgrade-versions/UpgradeVersionsPage.tsx b/packages/hub/src/app/admin/upgrade-versions/UpgradeVersionsPage.tsx
index e02ee978c3..19ac93bb0a 100644
--- a/packages/hub/src/app/admin/upgrade-versions/UpgradeVersionsPage.tsx
+++ b/packages/hub/src/app/admin/upgrade-versions/UpgradeVersionsPage.tsx
@@ -44,6 +44,7 @@ const UpgradeableModel: FC<{ modelRef: UpgradeVersionsPage_Model$key }> = ({
               id
               code
               version
+              seed
             }
           }
         }
diff --git a/packages/hub/src/app/api/updateModelSeeds/route.ts b/packages/hub/src/app/api/updateModelSeeds/route.ts
new file mode 100644
index 0000000000..b454ccc1dd
--- /dev/null
+++ b/packages/hub/src/app/api/updateModelSeeds/route.ts
@@ -0,0 +1,80 @@
+import { PrismaClient } from "@prisma/client";
+import { NextRequest, NextResponse } from "next/server";
+
+import { generateSeed } from "@quri/squiggle-lang";
+
+const prisma = new PrismaClient();
+
+async function updateSquiggleSnippetsSeedForModels() {
+  // Retrieve all models
+  const models = await prisma.model.findMany({
+    include: {
+      revisions: {
+        include: {
+          squiggleSnippet: true,
+        },
+        orderBy: {
+          createdAt: "desc",
+        },
+        take: 1,
+      },
+    },
+  });
+
+  for (const model of models) {
+    const lastRevision = model.revisions[0];
+
+    // Check if the last revision's SquiggleSnippet has the DEFAULT_SEED
+    if (
+      lastRevision.squiggleSnippet &&
+      lastRevision.squiggleSnippet.seed === "DEFAULT_SEED"
+    ) {
+      const newSeed = generateSeed();
+
+      // Update all SquiggleSnippets for all revisions of the current model
+      for (const revision of model.revisions) {
+        if (revision.squiggleSnippet) {
+          await prisma.squiggleSnippet.update({
+            where: {
+              id: revision.squiggleSnippet.id,
+            },
+            data: {
+              seed: newSeed,
+            },
+          });
+        }
+      }
+    }
+  }
+}
+
+export async function POST(req: NextRequest) {
+  const adminToken = req.headers.get("x-admin-token");
+  const secretToken = process.env["ADMIN_SECRET_TOKEN"];
+
+  if (!secretToken || adminToken !== secretToken) {
+    return new NextResponse(null, {
+      status: 401,
+      statusText: "Unauthorized access.",
+    });
+  }
+
+  try {
+    await updateSquiggleSnippetsSeedForModels();
+    return new NextResponse(
+      JSON.stringify({
+        message:
+          "Successfully updated seeds for models where the last revision had DEFAULT_SEED.",
+      }),
+      { status: 200 }
+    );
+  } catch (error) {
+    console.error("An error occurred:", error);
+    return new NextResponse(
+      JSON.stringify({
+        error: "An error occurred while updating seeds.",
+      }),
+      { status: 500 }
+    );
+  }
+}
diff --git a/packages/hub/src/app/models/[owner]/[slug]/EditSquiggleSnippetModel.tsx b/packages/hub/src/app/models/[owner]/[slug]/EditSquiggleSnippetModel.tsx
index 1a766aa3fc..3b8614a839 100644
--- a/packages/hub/src/app/models/[owner]/[slug]/EditSquiggleSnippetModel.tsx
+++ b/packages/hub/src/app/models/[owner]/[slug]/EditSquiggleSnippetModel.tsx
@@ -31,6 +31,7 @@ import {
 import { EditModelExports } from "@/components/exports/EditModelExports";
 import { ReactRoot } from "@/components/ReactRoot";
 import { FormModal } from "@/components/ui/FormModal";
+import { SAMPLE_COUNT_DEFAULT } from "@/constants";
 import { useAvailableHeight } from "@/hooks/useAvailableHeight";
 import { useMutationForm } from "@/hooks/useMutationForm";
 import { extractFromGraphqlErrorUnion } from "@/lib/graphqlHelpers";
@@ -151,6 +152,7 @@ export const EditSquiggleSnippetModel: FC<Props> = ({
               id
               code
               version
+              seed
             }
           }
           exports {
@@ -183,6 +185,8 @@ export const EditSquiggleSnippetModel: FC<Props> = ({
     "SquiggleSnippet"
   );
 
+  const seed = content.seed;
+
   const initialFormValues: SquiggleSnippetFormShape = useMemo(() => {
     return {
       code: content.code,
@@ -232,6 +236,7 @@ export const EditSquiggleSnippetModel: FC<Props> = ({
         content: {
           code: formData.code,
           version,
+          seed: seed,
         },
         relativeValuesExports: formData.relativeValuesExports,
         exports: formData.exports,
@@ -399,6 +404,11 @@ export const EditSquiggleSnippetModel: FC<Props> = ({
     };
   }
 
+  playgroundProps.environment = {
+    sampleCount: SAMPLE_COUNT_DEFAULT,
+    seed: seed,
+  };
+
   if (
     versionSupportsOnOpenExport.propsByVersion<"SquigglePlayground">(
       squiggle.version,
diff --git a/packages/hub/src/app/new/model/NewModel.tsx b/packages/hub/src/app/new/model/NewModel.tsx
index fe961efb9e..14c5ffc5fe 100644
--- a/packages/hub/src/app/new/model/NewModel.tsx
+++ b/packages/hub/src/app/new/model/NewModel.tsx
@@ -6,6 +6,7 @@ import { FormProvider } from "react-hook-form";
 import { useLazyLoadQuery } from "react-relay";
 import { graphql } from "relay-runtime";
 
+import { generateSeed } from "@quri/squiggle-lang";
 import { Button, CheckboxFormField } from "@quri/ui";
 import { defaultSquiggleVersion } from "@quri/versioned-squiggle-components";
 
@@ -102,6 +103,7 @@ export const NewModel: FC = () => {
         isPrivate: data.isPrivate,
         code: defaultCode,
         version: defaultSquiggleVersion,
+        seed: generateSeed(),
       },
     }),
     onCompleted: (result) => {
diff --git a/packages/hub/src/constants.ts b/packages/hub/src/constants.ts
index 4fafce342f..4555d4d32a 100644
--- a/packages/hub/src/constants.ts
+++ b/packages/hub/src/constants.ts
@@ -3,3 +3,7 @@
 // Note that only `NEXT_PUBLIC_*` vars are affected; others can be used through `process.env.FOO` without issues.
 
 export const VERCEL_URL = process.env["NEXT_PUBLIC_VERCEL_URL"];
+
+export const SAMPLE_COUNT_DEFAULT = 1000;
+
+export const DEFAULT_SEED = "DEFAULT_SEED";
diff --git a/packages/hub/src/graphql/mutations/adminUpdateModelVersion.ts b/packages/hub/src/graphql/mutations/adminUpdateModelVersion.ts
index ddacc7a7e5..b7fdbd75d7 100644
--- a/packages/hub/src/graphql/mutations/adminUpdateModelVersion.ts
+++ b/packages/hub/src/graphql/mutations/adminUpdateModelVersion.ts
@@ -54,6 +54,7 @@ builder.mutationField("adminUpdateModelVersion", (t) =>
               create: {
                 code: model.currentRevision.squiggleSnippet.code,
                 version: input.version,
+                seed: model.currentRevision.squiggleSnippet.seed,
               },
             },
             contentType: "SquiggleSnippet",
diff --git a/packages/hub/src/graphql/mutations/createSquiggleSnippetModel.ts b/packages/hub/src/graphql/mutations/createSquiggleSnippetModel.ts
index 55bf004bf7..45381a4709 100644
--- a/packages/hub/src/graphql/mutations/createSquiggleSnippetModel.ts
+++ b/packages/hub/src/graphql/mutations/createSquiggleSnippetModel.ts
@@ -36,6 +36,10 @@ builder.mutationField("createSquiggleSnippetModel", (t) =>
       isPrivate: t.input.boolean({
         description: "Defaults to false",
       }),
+      seed: t.input.string({
+        required: true,
+        description: "A unique seed, used for calculation",
+      }),
     },
     resolve: async (_, { input }, { session }) => {
       const model = await prisma.$transaction(async (tx) => {
@@ -67,6 +71,7 @@ builder.mutationField("createSquiggleSnippetModel", (t) =>
               create: {
                 code: input.code,
                 version: input.version,
+                seed: input.seed,
               },
             },
             author: {
diff --git a/packages/hub/src/graphql/mutations/updateSquiggleSnippetModel.ts b/packages/hub/src/graphql/mutations/updateSquiggleSnippetModel.ts
index 7074b387fc..c396a1ad5d 100644
--- a/packages/hub/src/graphql/mutations/updateSquiggleSnippetModel.ts
+++ b/packages/hub/src/graphql/mutations/updateSquiggleSnippetModel.ts
@@ -35,6 +35,7 @@ const SquiggleSnippetContentInput = builder.inputType(
     fields: (t) => ({
       code: t.string({ required: true }),
       version: t.string({ required: true }),
+      seed: t.string({ required: true }),
     }),
   }
 );
@@ -144,6 +145,7 @@ builder.mutationField("updateSquiggleSnippetModel", (t) =>
               create: {
                 code: input.content.code,
                 version: input.content.version,
+                seed: input.content.seed,
               },
             },
             contentType: "SquiggleSnippet",
diff --git a/packages/hub/src/graphql/queries/runSquiggle.ts b/packages/hub/src/graphql/queries/runSquiggle.ts
index eb86528dcd..dd4a590f03 100644
--- a/packages/hub/src/graphql/queries/runSquiggle.ts
+++ b/packages/hub/src/graphql/queries/runSquiggle.ts
@@ -3,6 +3,7 @@ import crypto from "crypto";
 
 import { SqProject, SqValue } from "@quri/squiggle-lang";
 
+import { DEFAULT_SEED, SAMPLE_COUNT_DEFAULT } from "@/constants";
 import { builder } from "@/graphql/builder";
 import { prisma } from "@/prisma";
 
@@ -80,9 +81,9 @@ export async function runSquiggle(code: string): Promise<SquiggleOutput> {
   const MAIN = "main";
 
   const env = {
-    sampleCount: 1000, // int
+    sampleCount: SAMPLE_COUNT_DEFAULT, // int
     xyPointLength: 1000, // int
-    seed: "default_seed",
+    seed: DEFAULT_SEED,
   };
 
   const project = SqProject.create({ environment: env });
diff --git a/packages/hub/src/graphql/types/ModelRevision.ts b/packages/hub/src/graphql/types/ModelRevision.ts
index 056ee4acec..7baed3f336 100644
--- a/packages/hub/src/graphql/types/ModelRevision.ts
+++ b/packages/hub/src/graphql/types/ModelRevision.ts
@@ -9,6 +9,7 @@ export const SquiggleSnippet = builder.prismaNode("SquiggleSnippet", {
   fields: (t) => ({
     code: t.exposeString("code"),
     version: t.exposeString("version"),
+    seed: t.exposeString("seed"),
   }),
 });
 
diff --git a/packages/squiggle-lang/src/index.ts b/packages/squiggle-lang/src/index.ts
index 928f1c9f6a..5005bee76f 100644
--- a/packages/squiggle-lang/src/index.ts
+++ b/packages/squiggle-lang/src/index.ts
@@ -130,3 +130,5 @@ export {
   SCALE_POWER_DEFAULT_CONSTANT,
   SCALE_SYMLOG_DEFAULT_CONSTANT,
 } from "./value/VScale.js";
+
+export { generateSeed } from "./utility/seedGenerator.js";
diff --git a/packages/squiggle-lang/src/utility/seedGenerator.ts b/packages/squiggle-lang/src/utility/seedGenerator.ts
new file mode 100644
index 0000000000..d8647d6ddc
--- /dev/null
+++ b/packages/squiggle-lang/src/utility/seedGenerator.ts
@@ -0,0 +1,11 @@
+import sample from "lodash/sample.js";
+
+import { seedWords } from "./seedWords.js";
+
+export function generateSeed(): string {
+  return [
+    sample(seedWords)?.toUpperCase(),
+    sample(seedWords)?.toUpperCase(),
+    sample(seedWords)?.toUpperCase(),
+  ].join("_");
+}
diff --git a/packages/components/src/lib/seedWords.ts b/packages/squiggle-lang/src/utility/seedWords.ts
similarity index 100%
rename from packages/components/src/lib/seedWords.ts
rename to packages/squiggle-lang/src/utility/seedWords.ts