diff --git a/gui/src/client/api.ts b/gui/src/client/api.ts
index 6bed1e46..1271caab 100644
--- a/gui/src/client/api.ts
+++ b/gui/src/client/api.ts
@@ -7,6 +7,7 @@ import {
   ApiClient,
   BaseImgParams,
   BlendParams,
+  ChainPipeline,
   FilterResponse,
   HighresParams,
   ImageResponse,
@@ -430,6 +431,16 @@ export function makeClient(root: string, token: Maybe<string> = undefined, f = f
         }
       };
     },
+    async chain(chain: ChainPipeline): Promise<ImageResponse> {
+      const url = makeApiUrl(root, 'chain');
+      const body = JSON.stringify(chain);
+
+      // eslint-disable-next-line no-return-await
+      return await parseRequest(url, {
+        body,
+        method: 'POST',
+      });
+    },
     async ready(key: string): Promise<ReadyResponse> {
       const path = makeApiUrl(root, 'ready');
       path.searchParams.append('output', key);
diff --git a/gui/src/client/local.ts b/gui/src/client/local.ts
index 97f785a8..273e5168 100644
--- a/gui/src/client/local.ts
+++ b/gui/src/client/local.ts
@@ -39,6 +39,9 @@ export const LOCAL_CLIENT = {
   async outpaint(model, params, upscale) {
     throw new NoServerError();
   },
+  async chain(chain) {
+    throw new NoServerError();
+  },
   async noises() {
     throw new NoServerError();
   },
diff --git a/gui/src/client/types.ts b/gui/src/client/types.ts
index b9d22495..d1912d7b 100644
--- a/gui/src/client/types.ts
+++ b/gui/src/client/types.ts
@@ -162,6 +162,22 @@ export interface HighresParams {
   highresStrength: number;
 }
 
+export interface Txt2ImgStage {
+  name: string;
+  type: 'source-txt2img';
+  params: Txt2ImgParams;
+}
+
+export interface Img2ImgStage {
+  name: string;
+  type: 'blend-img2img';
+  params: Img2ImgParams;
+}
+
+export interface ChainPipeline {
+  stages: Array<Txt2ImgStage | Img2ImgStage>;
+}
+
 /**
  * Output image data within the response.
  */
@@ -354,6 +370,8 @@ export interface ApiClient {
    */
   blend(model: ModelParams, params: BlendParams, upscale?: UpscaleParams): Promise<ImageResponseWithRetry>;
 
+  chain(chain: ChainPipeline): Promise<ImageResponse>;
+
   /**
    * Check whether job has finished and its output is ready.
    */
diff --git a/gui/src/client/utils.ts b/gui/src/client/utils.ts
new file mode 100644
index 00000000..d1d69141
--- /dev/null
+++ b/gui/src/client/utils.ts
@@ -0,0 +1,42 @@
+import { ChainPipeline, HighresParams, ModelParams, Txt2ImgParams, UpscaleParams } from './types.js';
+
+export interface PipelineVariable {
+  parameter: 'prompt' | 'cfg' | 'seed' | 'steps';
+  input: string;
+  values: Array<string>;
+}
+
+export interface PipelineGrid {
+  enabled: boolean;
+  columns: PipelineVariable;
+  rows: PipelineVariable;
+}
+
+// eslint-disable-next-line max-params
+export function buildPipelineForTxt2ImgGrid(grid: PipelineGrid, model: ModelParams, params: Txt2ImgParams, upscale?: UpscaleParams, highres?: HighresParams): ChainPipeline {
+  const pipeline: ChainPipeline = {
+    stages: [],
+  };
+
+  let i = 0;
+
+  for (const column of grid.columns.values) {
+    for (const row of grid.rows.values) {
+      pipeline.stages.push({
+        name: `cell-${i}`,
+        type: 'source-txt2img',
+        params: {
+          ...params,
+          [grid.columns.parameter]: column,
+          [grid.rows.parameter]: row,
+        },
+      });
+
+      i += 1;
+    }
+  }
+
+  // TODO: add final grid stage
+
+  return pipeline;
+}
diff --git a/gui/src/components/card/ErrorCard.tsx b/gui/src/components/card/ErrorCard.tsx
index fe683e67..9bb6e455 100644
--- a/gui/src/components/card/ErrorCard.tsx
+++ b/gui/src/components/card/ErrorCard.tsx
@@ -1,4 +1,4 @@
-import { mustExist } from '@apextoaster/js-utils';
+import { Maybe, doesExist, mustExist } from '@apextoaster/js-utils';
 import { Delete, Replay } from '@mui/icons-material';
 import { Alert, Box, Card, CardContent, IconButton, Tooltip } from '@mui/material';
 import { Stack } from '@mui/system';
@@ -15,7 +15,7 @@ import { ClientContext, ConfigContext, OnnxState, StateContext } from '../../sta
 export interface ErrorCardProps {
   image: ImageResponse;
   ready: ReadyResponse;
-  retry: RetryParams;
+  retry: Maybe<RetryParams>;
 }
 
 export function ErrorCard(props: ErrorCardProps) {
@@ -30,8 +30,11 @@ export function ErrorCard(props: ErrorCardProps) {
 
   async function retryImage() {
     removeHistory(image);
-    const { image: nextImage, retry: nextRetry } = await client.retry(retryParams);
-    pushHistory(nextImage, nextRetry);
+
+    if (doesExist(retryParams)) {
+      const { image: nextImage, retry: nextRetry } = await client.retry(retryParams);
+      pushHistory(nextImage, nextRetry);
+    }
   }
 
   const retry = useMutation(retryImage);
diff --git a/gui/src/components/control/VariableControl.tsx b/gui/src/components/control/VariableControl.tsx
new file mode 100644
index 00000000..cd159954
--- /dev/null
+++ b/gui/src/components/control/VariableControl.tsx
@@ -0,0 +1,107 @@
+import { doesExist, mustExist } from '@apextoaster/js-utils';
+import { Checkbox, FormControl, InputLabel, MenuItem, Select, Stack, TextField } from '@mui/material';
+import * as React from 'react';
+import { useContext } from 'react';
+import { useStore } from 'zustand';
+
+import { PipelineGrid } from '../../client/utils.js';
+import { OnnxState, StateContext } from '../../state.js';
+
+export interface VariableControlProps {
+  selectGrid: (state: OnnxState) => PipelineGrid;
+  setGrid: (grid: Partial<PipelineGrid>) => void;
+}
+
+export type VariableKey = 'prompt' | 'steps' | 'seed';
+
+export function VariableControl(props: VariableControlProps) {
+  const store = mustExist(useContext(StateContext));
+  const grid = useStore(store, props.selectGrid);
+
+  return <Stack direction='column' spacing={2}>
+    <Stack direction='row' spacing={2}>
+      <InputLabel>Grid Mode</InputLabel>
+      <Checkbox checked={grid.enabled} onChange={() => props.setGrid({
+        enabled: grid.enabled === false,
+      })} />
+    </Stack>
+    <Stack direction='row' spacing={2}>
+      <FormControl>
+        <InputLabel id='TODO'>Columns</InputLabel>
+        <Select onChange={(event) => props.setGrid({
+          columns: {
+            parameter: event.target.value as VariableKey,
+            input: '',
+            values: [],
+          },
+        })} value={grid.columns.parameter}>
+          <MenuItem key='prompt' value='prompt'>Prompt</MenuItem>
+          <MenuItem key='seed' value='seed'>Seed</MenuItem>
+          <MenuItem key='steps' value='steps'>Steps</MenuItem>
+        </Select>
+      </FormControl>
+      <TextField label={grid.columns.parameter} value={grid.columns.input} onChange={(event) => props.setGrid({
+        columns: {
+          parameter: grid.columns.parameter,
+          input: event.target.value,
+          values: rangeSplit(grid.columns.parameter, event.target.value),
+        },
+      })} />
+    </Stack>
+    <Stack direction='row' spacing={2}>
+      <FormControl>
+        <InputLabel id='TODO'>Rows</InputLabel>
+        <Select onChange={(event) => props.setGrid({
+          rows: {
+            parameter: event.target.value as VariableKey,
+            input: '',
+            values: [],
+          }
+        })} value={grid.rows.parameter}>
+          <MenuItem key='prompt' value='prompt'>Prompt</MenuItem>
+          <MenuItem key='seed' value='seed'>Seed</MenuItem>
+          <MenuItem key='steps' value='steps'>Steps</MenuItem>
+        </Select>
+      </FormControl>
+      <TextField label={grid.rows.parameter} value={grid.rows.input} onChange={(event) => props.setGrid({
+        rows: {
+          parameter: grid.rows.parameter,
+          input: event.target.value,
+          values: rangeSplit(grid.rows.parameter, event.target.value),
+        }
+      })} />
+    </Stack>
+  </Stack>;
+}
+
+export function rangeSplit(parameter: string, value: string): Array<string> {
+  // string values
+  if (parameter === 'prompt') {
+    return value.split('\n');
+  }
+
+  return value.split(',').map((it) => it.trim()).flatMap((it) => expandRanges(it));
+}
+
+export const EXPR_STRICT_NUMBER = /^[0-9]+$/;
+export const EXPR_NUMBER_RANGE = /^([0-9]+)-([0-9]+)$/;
+
+export function expandRanges(range: string): Array<string> {
+  if (EXPR_STRICT_NUMBER.test(range)) {
+    // entirely numeric, return without parsing
+    return [range];
+  }
+
+  if (EXPR_NUMBER_RANGE.test(range)) {
+    const match = EXPR_NUMBER_RANGE.exec(range);
+    if (doesExist(match)) {
+      const [_full, startStr, endStr] = Array.from(match);
+      const start = parseInt(startStr, 10);
+      const end = parseInt(endStr, 10);
+
+      return new Array(end - start).fill(0).map((_value, idx) => (idx + start).toFixed(0));
+    }
+  }
+
+  return [];
+}
diff --git a/gui/src/components/tab/Txt2Img.tsx b/gui/src/components/tab/Txt2Img.tsx
index 76e669ce..d5347926 100644
--- a/gui/src/components/tab/Txt2Img.tsx
+++ b/gui/src/components/tab/Txt2Img.tsx
@@ -15,15 +15,27 @@ import { ModelControl } from '../control/ModelControl.js';
 import { UpscaleControl } from '../control/UpscaleControl.js';
 import { NumericField } from '../input/NumericField.js';
 import { Profiles } from '../Profiles.js';
+import { VariableControl } from '../control/VariableControl.js';
+import { PipelineGrid, buildPipelineForTxt2ImgGrid } from '../../client/utils.js';
 
 export function Txt2Img() {
   const { params } = mustExist(useContext(ConfigContext));
 
   async function generateImage() {
     const state = store.getState();
-    const { image, retry } = await client.txt2img(model, selectParams(state), selectUpscale(state), selectHighres(state));
+    const grid = selectVariable(state);
+    const params2 = selectParams(state);
+    const upscale = selectUpscale(state);
+    const highres = selectHighres(state);
 
-    pushHistory(image, retry);
+    if (grid.enabled) {
+      const chain = buildPipelineForTxt2ImgGrid(grid, model, params2, upscale, highres);
+      const image = await client.chain(chain);
+      pushHistory(image);
+    } else {
+      const { image, retry } = await client.txt2img(model, params2, upscale, highres);
+      pushHistory(image, retry);
+    }
   }
 
   const client = mustExist(useContext(ClientContext));
@@ -33,7 +45,7 @@ export function Txt2Img() {
   });
 
   const store = mustExist(useContext(StateContext));
-  const { pushHistory, setHighres, setModel, setParams, setUpscale } = useStore(store, selectActions, shallow);
+  const { pushHistory, setHighres, setModel, setParams, setUpscale, setVariable } = useStore(store, selectActions, shallow);
   const { height, width } = useStore(store, selectReactParams, shallow);
   const model = useStore(store, selectModel);
 
@@ -79,6 +91,7 @@ export function Txt2Img() {
       </Stack>
       <HighresControl selectHighres={selectHighres} setHighres={setHighres} />
       <UpscaleControl selectUpscale={selectUpscale} setUpscale={setUpscale} />
+      <VariableControl selectGrid={selectVariable} setGrid={setVariable} />
       <Button
         variant='contained'
         onClick={() => generate.mutate()}
@@ -99,6 +112,8 @@ export function selectActions(state: OnnxState) {
     setParams: state.setTxt2Img,
     // eslint-disable-next-line @typescript-eslint/unbound-method
     setUpscale: state.setTxt2ImgUpscale,
+    // eslint-disable-next-line @typescript-eslint/unbound-method
+    setVariable: state.setTxt2ImgVariable,
   };
 }
 
@@ -124,3 +139,7 @@ export function selectHighres(state: OnnxState): HighresParams {
 export function selectUpscale(state: OnnxState): UpscaleParams {
   return state.txt2imgUpscale;
 }
+
+export function selectVariable(state: OnnxState): PipelineGrid {
+  return state.txt2imgVariable;
+}
diff --git a/gui/src/state.ts b/gui/src/state.ts
index 25398689..5144fd7d 100644
--- a/gui/src/state.ts
+++ b/gui/src/state.ts
@@ -25,6 +25,7 @@ import {
 } from './client/types.js';
 import { Config, ConfigFiles, ConfigState, ServerParams } from './config.js';
 import { CorrectionModel, DiffusionModel, ExtraNetwork, ExtraSource, ExtrasFile, UpscalingModel } from './types.js';
+import { PipelineGrid } from './client/utils.js';
 
 export const MISSING_INDEX = -1;
 
@@ -38,7 +39,7 @@ export type TabState<TabParams> = ConfigFiles<Required<TabParams>> & ConfigState
 export interface HistoryItem {
   image: ImageResponse;
   ready: Maybe<ReadyResponse>;
-  retry: RetryParams;
+  retry: Maybe<RetryParams>;
 }
 
 export interface ProfileItem {
@@ -60,7 +61,7 @@ interface HistorySlice {
   history: Array<HistoryItem>;
   limit: number;
 
-  pushHistory(image: ImageResponse, retry: RetryParams): void;
+  pushHistory(image: ImageResponse, retry?: RetryParams): void;
   removeHistory(image: ImageResponse): void;
   setLimit(limit: number): void;
   setReady(image: ImageResponse, ready: ReadyResponse): void;
@@ -90,6 +91,7 @@ interface Txt2ImgSlice {
   txt2imgModel: ModelParams;
   txt2imgHighres: HighresParams;
   txt2imgUpscale: UpscaleParams;
+  txt2imgVariable: PipelineGrid;
 
   resetTxt2Img(): void;
 
@@ -97,6 +99,7 @@ interface Txt2ImgSlice {
   setTxt2ImgModel(params: Partial<ModelParams>): void;
   setTxt2ImgHighres(params: Partial<HighresParams>): void;
   setTxt2ImgUpscale(params: Partial<UpscaleParams>): void;
+  setTxt2ImgVariable(params: Partial<PipelineGrid>): void;
 }
 
 interface Img2ImgSlice {
@@ -305,6 +308,19 @@ export function createStateSlices(server: ServerParams) {
     scale: server.scale.default,
     upscaleOrder: server.upscaleOrder.default,
   };
+  const defaultGrid: PipelineGrid = {
+    enabled: false,
+    columns: {
+      input: '',
+      parameter: 'seed',
+      values: [],
+    },
+    rows: {
+      input: '',
+      parameter: 'seed',
+      values: [],
+    },
+  };
 
   const createTxt2ImgSlice: Slice<Txt2ImgSlice> = (set) => ({
     txt2img: {
@@ -321,6 +337,9 @@ export function createStateSlices(server: ServerParams) {
     txt2imgUpscale: {
       ...defaultUpscale,
     },
+    txt2imgVariable: {
+      ...defaultGrid,
+    },
     setTxt2Img(params) {
       set((prev) => ({
         txt2img: {
@@ -353,6 +372,14 @@ export function createStateSlices(server: ServerParams) {
         },
       }));
     },
+    setTxt2ImgVariable(params) {
+      set((prev) => ({
+        txt2imgVariable: {
+          ...prev.txt2imgVariable,
+          ...params,
+        },
+      }));
+    },
     resetTxt2Img() {
       set({
         txt2img: {