diff --git a/src/common/components/forms/useLLMSelect.tsx b/src/common/components/forms/useLLMSelect.tsx
index 6a7f5cfa5..83b47ff5e 100644
--- a/src/common/components/forms/useLLMSelect.tsx
+++ b/src/common/components/forms/useLLMSelect.tsx
@@ -11,7 +11,7 @@ import { findModelVendor } from '~/modules/llms/vendors/vendors.registry';
 import { llmsGetVendorIcon, LLMVendorIcon } from '~/modules/llms/components/LLMVendorIcon';
 
 import type { DModelDomainId } from '~/common/stores/llms/model.domains.types';
-import { DLLM, DLLMId, LLM_IF_OAI_Reasoning, LLM_IF_Outputs_Audio, LLM_IF_Outputs_Image, LLM_IF_Tools_WebSearch } from '~/common/stores/llms/llms.types';
+import { DLLM, DLLMId, getLLMPricing, LLM_IF_OAI_Reasoning, LLM_IF_Outputs_Audio, LLM_IF_Outputs_Image, LLM_IF_Tools_WebSearch } from '~/common/stores/llms/llms.types';
 import { PhGearSixIcon } from '~/common/components/icons/phosphor/PhGearSixIcon';
 import { StarredNoXL2 } from '~/common/components/StarIcons';
 import { TooltipOutlined } from '~/common/components/TooltipOutlined';
@@ -182,7 +182,7 @@ export function useLLMSelect(
 
       let features = '';
       const isNotSymlink = !llm.label.startsWith('🔗');
-      const seemsFree = !!llm.pricing?.chat?._isFree;
+      const seemsFree = !!getLLMPricing(llm)?.chat?._isFree;
       if (isNotSymlink) {
         // check features
         if (seemsFree) features += 'free ';
diff --git a/src/common/stores/llms/llms.types.ts b/src/common/stores/llms/llms.types.ts
index 9d4baaba6..2948959d6 100644
--- a/src/common/stores/llms/llms.types.ts
+++ b/src/common/stores/llms/llms.types.ts
@@ -51,6 +51,7 @@ export interface DLLM {
   userParameters?: DModelParameterValues; // user has set these parameters
   userContextTokens?: DLLMContextTokens;       // user override for context window
   userMaxOutputTokens?: DLLMMaxOutputTokens;   // user override for max output tokens
+  userPricing?: DModelPricing;                 // user override for model pricing
 }
 
 
@@ -121,6 +122,18 @@ export function getLLMMaxOutputTokens(llm: DLLM | null): DLLMMaxOutputTokens | u
   return llm.userMaxOutputTokens ?? llm.maxOutputTokens;
 }
 
+/**
+ * Returns the effective pricing for a model.
+ * Checks user override first, then falls back to model default.
+ */
+export function getLLMPricing(llm: DLLM | null): DModelPricing | undefined {
+  if (!llm)
+    return undefined; // undefined if no model
+
+  // Check user override first, then fall back to model default
+  return llm.userPricing ?? llm.pricing;
+}
+
 
 /// Interfaces ///
 
diff --git a/src/common/stores/llms/store-llms-domains_slice.ts b/src/common/stores/llms/store-llms-domains_slice.ts
index f3f82772b..27e637b2a 100644
--- a/src/common/stores/llms/store-llms-domains_slice.ts
+++ b/src/common/stores/llms/store-llms-domains_slice.ts
@@ -3,7 +3,7 @@ import type { StateCreator } from 'zustand/vanilla';
 import type { ModelVendorId } from '~/modules/llms/vendors/vendors.registry';
 
 import type { DModelDomainId } from './model.domains.types';
-import { DLLM, DLLMId, isLLMHidden, isLLMVisible } from './llms.types';
+import { DLLM, DLLMId, getLLMPricing, isLLMHidden, isLLMVisible } from './llms.types';
 import { LlmsRootState, useModelsStore } from './store-llms';
 import { ModelDomainsList, ModelDomainsRegistry } from './model.domains.registry';
 import { createDModelConfiguration, DModelConfiguration } from './modelconfiguration.types';
@@ -275,7 +275,7 @@ function _groupLlmsByVendorRankedByElo(llms: ReadonlyArray<DLLM>): PreferredRank
     const eloCostItem = {
       id: llm.id,
       cbaElo: llm.benchmark?.cbaElo,
-      costRank: !llm.pricing ? undefined : _getLlmCostBenchmark(llm),
+      costRank: !getLLMPricing(llm) ? undefined : _getLlmCostBenchmark(llm),
     };
     if (!group)
       acc.push({ vendorId: llm.vId, llmsByElo: [eloCostItem] });
@@ -295,8 +295,9 @@ function _groupLlmsByVendorRankedByElo(llms: ReadonlyArray<DLLM>): PreferredRank
 
 // Hypothetical cost benchmark for a model, based on total cost of 100k input tokens and 10k output tokens.
 function _getLlmCostBenchmark(llm: DLLM): number | undefined {
-  if (!llm.pricing?.chat) return undefined;
-  const costIn = getLlmCostForTokens(100000, 100000, llm.pricing.chat.input);
-  const costOut = getLlmCostForTokens(100000, 10000, llm.pricing.chat.output);
+  const pricing = getLLMPricing(llm);
+  if (!pricing?.chat) return undefined;
+  const costIn = getLlmCostForTokens(100000, 100000, pricing.chat.input);
+  const costOut = getLlmCostForTokens(100000, 10000, pricing.chat.output);
   return (costIn !== undefined && costOut !== undefined) ? costIn + costOut : undefined;
 }
diff --git a/src/common/stores/llms/store-llms.ts b/src/common/stores/llms/store-llms.ts
index 45f27c554..d0365f66e 100644
--- a/src/common/stores/llms/store-llms.ts
+++ b/src/common/stores/llms/store-llms.ts
@@ -86,6 +86,7 @@ export const useModelsStore = create<LlmsStore>()(persist(
               ...(existing.userParameters !== undefined ? { userParameters: { ...existing.userParameters } } : {}),
               ...(existing.userContextTokens !== undefined ? { userContextTokens: existing.userContextTokens } : {}),
               ...(existing.userMaxOutputTokens !== undefined ? { userMaxOutputTokens: existing.userMaxOutputTokens } : {}),
+              ...(existing.userPricing !== undefined ? { userPricing: existing.userPricing } : {}),
             };
           });
         }
diff --git a/src/modules/aix/client/aix.client.ts b/src/modules/aix/client/aix.client.ts
index 4851b3c88..a0ba19a82 100644
--- a/src/modules/aix/client/aix.client.ts
+++ b/src/modules/aix/client/aix.client.ts
@@ -2,7 +2,7 @@ import { findServiceAccessOrThrow } from '~/modules/llms/vendors/vendor.helpers'
 
 import type { DMessage, DMessageGenerator } from '~/common/stores/chat/chat.message';
 import type { MaybePromise } from '~/common/types/useful.types';
-import { DLLM, DLLMId, LLM_IF_HOTFIX_NoTemperature, LLM_IF_OAI_Responses, LLM_IF_Outputs_Audio, LLM_IF_Outputs_Image, LLM_IF_Outputs_NoText } from '~/common/stores/llms/llms.types';
+import { DLLM, DLLMId, getLLMPricing, LLM_IF_HOTFIX_NoTemperature, LLM_IF_OAI_Responses, LLM_IF_Outputs_Audio, LLM_IF_Outputs_Image, LLM_IF_Outputs_NoText } from '~/common/stores/llms/llms.types';
 import { DMetricsChatGenerate_Lg, metricsChatGenerateLgToMd, metricsComputeChatGenerateCostsMd } from '~/common/stores/metrics/metrics.chatgenerate';
 import { DModelParameterValues, getAllModelParameterValues } from '~/common/stores/llms/llms.parameters';
 import { apiStream } from '~/common/util/trpc.client';
@@ -535,7 +535,7 @@ function _llToDMessage(src: AixChatGenerateContent_LL, dest: AixChatGenerateCont
 function _updateGeneratorCostsInPlace(generator: DMessageGenerator, llm: DLLM, debugCostSource: string) {
   // Compute costs
   const logLlmRefId = getAllModelParameterValues(llm.initialParameters, llm.userParameters).llmRef || llm.id;
-  const costs = metricsComputeChatGenerateCostsMd(generator.metrics, llm.pricing?.chat, logLlmRefId);
+  const costs = metricsComputeChatGenerateCostsMd(generator.metrics, getLLMPricing(llm)?.chat, logLlmRefId);
   if (!costs) {
     // FIXME: we shall warn that the costs are missing, as the only way to get pricing is through surfacing missing prices
     return;
diff --git a/src/modules/llms/models-modal/LLMOptionsModal.tsx b/src/modules/llms/models-modal/LLMOptionsModal.tsx
index 32425f859..fb00751dc 100644
--- a/src/modules/llms/models-modal/LLMOptionsModal.tsx
+++ b/src/modules/llms/models-modal/LLMOptionsModal.tsx
@@ -9,7 +9,7 @@ import VisibilityIcon from '@mui/icons-material/Visibility';
 import VisibilityOffIcon from '@mui/icons-material/VisibilityOff';
 
 import type { DPricingChatGenerate } from '~/common/stores/llms/llms.pricing';
-import { DLLMId, getLLMContextTokens, getLLMMaxOutputTokens, isLLMVisible } from '~/common/stores/llms/llms.types';
+import { DLLMId, getLLMContextTokens, getLLMMaxOutputTokens, getLLMPricing, isLLMVisible } from '~/common/stores/llms/llms.types';
 import { FormLabelStart } from '~/common/components/forms/FormLabelStart';
 import { GoodModal } from '~/common/components/modals/GoodModal';
 import { ModelDomainsList, ModelDomainsRegistry } from '~/common/stores/llms/model.domains.registry';
@@ -107,6 +107,60 @@ export function LLMOptionsModal(props: { id: DLLMId, onClose: () => void }) {
 
   const handleMaxOutputTokensReset = () => updateLLM(llm.id, { userMaxOutputTokens: undefined });
 
+  const handleInputPriceChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    const value = event.target.value;
+    const numValue = value ? parseFloat(value) : undefined;
+    updateLLM(llm.id, {
+      userPricing: {
+        chat: {
+          ...llm.userPricing?.chat,
+          input: numValue,
+          output: llm.userPricing?.chat?.output,
+        },
+      },
+    });
+  };
+
+  const handleInputPriceReset = () => {
+    const newPricing = { ...llm.userPricing };
+    if (newPricing.chat) {
+      delete newPricing.chat.input;
+      // If no other pricing fields are set, clear userPricing entirely
+      if (!newPricing.chat.output && !newPricing.chat.cache) {
+        updateLLM(llm.id, { userPricing: undefined });
+      } else {
+        updateLLM(llm.id, { userPricing: newPricing });
+      }
+    }
+  };
+
+  const handleOutputPriceChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    const value = event.target.value;
+    const numValue = value ? parseFloat(value) : undefined;
+    updateLLM(llm.id, {
+      userPricing: {
+        chat: {
+          ...llm.userPricing?.chat,
+          input: llm.userPricing?.chat?.input,
+          output: numValue,
+        },
+      },
+    });
+  };
+
+  const handleOutputPriceReset = () => {
+    const newPricing = { ...llm.userPricing };
+    if (newPricing.chat) {
+      delete newPricing.chat.output;
+      // If no other pricing fields are set, clear userPricing entirely
+      if (!newPricing.chat.input && !newPricing.chat.cache) {
+        updateLLM(llm.id, { userPricing: undefined });
+      } else {
+        updateLLM(llm.id, { userPricing: newPricing });
+      }
+    }
+  };
+
   const handleLlmDelete = () => {
     removeLLM(llm.id);
     props.onClose();
@@ -235,7 +289,7 @@ export function LLMOptionsModal(props: { id: DLLMId, onClose: () => void }) {
             {llm.description}
           </Typography>}
 
-          {!!llm.pricing?.chat?._isFree && <Typography level='body-xs'>
+          {!!getLLMPricing(llm)?.chat?._isFree && <Typography level='body-xs'>
             🎁 Free model - note: refresh models to check for updates in pricing
           </Typography>}
 
@@ -245,7 +299,7 @@ export function LLMOptionsModal(props: { id: DLLMId, onClose: () => void }) {
             max output tokens: <b>{getLLMMaxOutputTokens(llm)?.toLocaleString() ?? 'not provided'}</b><br />
             {!!llm.created && <>created: <TimeAgo date={new Date(llm.created * 1000)} /><br /></>}
             {/*· tags: {llm.tags.join(', ')}*/}
-            {!!llm.pricing?.chat && prettyPricingComponent(llm.pricing.chat)}
+            {!!getLLMPricing(llm)?.chat && prettyPricingComponent(getLLMPricing(llm)!.chat!)}
             {/*{!!llm.benchmark && <>benchmark: <b>{llm.benchmark.cbaElo?.toLocaleString() || '(unk) '}</b> CBA Elo<br /></>}*/}
             {llm.parameterSpecs?.length > 0 && <>options: {llm.parameterSpecs.map(ps => ps.paramId).join(', ')}<br /></>}
             {Object.keys(llm.initialParameters || {}).length > 0 && <>initial parameters: {JSON.stringify(llm.initialParameters, null, 2)}<br /></>}
@@ -297,6 +351,57 @@ export function LLMOptionsModal(props: { id: DLLMId, onClose: () => void }) {
             </Grid>
           </Grid>
 
+          {/* Advanced: Pricing Overrides */}
+          <Grid container spacing={2} alignItems='center' sx={{ mt: 1 }}>
+            <Grid xs={12}>
+              <Typography level='title-sm'>
+                Pricing Override (for hypothetical cost tracking)
+              </Typography>
+            </Grid>
+
+            <Grid xs={12} md={6}>
+              <FormControl orientation='horizontal' sx={{ flexWrap: 'wrap', alignItems: 'center' }}>
+                <FormLabelStart title='Input Price' description='$/Million Tokens' sx={{ minWidth: 120 }} />
+                <Input
+                  type='number'
+                  variant='outlined'
+                  placeholder={
+                    // NOTE: direct access to the underlying, instead of via getLLMPricing
+                    typeof llm.pricing?.chat?.input === 'number' ? llm.pricing.chat.input.toString() : 'not set'
+                  }
+                  value={llm.userPricing?.chat?.input ?? ''}
+                  onChange={handleInputPriceChange}
+                  endDecorator={llm.userPricing?.chat?.input !== undefined && (
+                    <Button size='sm' variant='plain' onClick={handleInputPriceReset}>Reset</Button>
+                  )}
+                  slotProps={{ input: { min: 0, step: 0.01 } }}
+                  sx={{ flex: 1 }}
+                />
+              </FormControl>
+            </Grid>
+
+            <Grid xs={12} md={6}>
+              <FormControl orientation='horizontal' sx={{ flexWrap: 'wrap', alignItems: 'center' }}>
+                <FormLabelStart title='Output Price' description='$/Million Tokens' sx={{ minWidth: 120 }} />
+                <Input
+                  type='number'
+                  variant='outlined'
+                  placeholder={
+                    // NOTE: direct access to the underlying, instead of via getLLMPricing
+                    typeof llm.pricing?.chat?.output === 'number' ? llm.pricing.chat.output.toString() : 'not set'
+                  }
+                  value={llm.userPricing?.chat?.output ?? ''}
+                  onChange={handleOutputPriceChange}
+                  slotProps={{ input: { min: 0, step: 0.01 } }}
+                  endDecorator={llm.userPricing?.chat?.output !== undefined && (
+                    <Button size='sm' variant='plain' onClick={handleOutputPriceReset}>Reset</Button>
+                  )}
+                  sx={{ flex: 1 }}
+                />
+              </FormControl>
+            </Grid>
+          </Grid>
+
         </Box>}
       </FormControl>
 
diff --git a/src/modules/llms/models-modal/ModelsList.tsx b/src/modules/llms/models-modal/ModelsList.tsx
index 2295aaf86..a0e4f5862 100644
--- a/src/modules/llms/models-modal/ModelsList.tsx
+++ b/src/modules/llms/models-modal/ModelsList.tsx
@@ -8,7 +8,7 @@ import VisibilityOffOutlinedIcon from '@mui/icons-material/VisibilityOffOutlined
 import VisibilityOutlinedIcon from '@mui/icons-material/VisibilityOutlined';
 
 import type { DModelsServiceId } from '~/common/stores/llms/llms.service.types';
-import { DLLM, DLLMId, getLLMContextTokens, getLLMMaxOutputTokens, isLLMHidden, LLM_IF_ANT_PromptCaching, LLM_IF_GEM_CodeExecution, LLM_IF_OAI_Complete, LLM_IF_OAI_Fn, LLM_IF_OAI_Json, LLM_IF_OAI_PromptCaching, LLM_IF_OAI_Realtime, LLM_IF_OAI_Reasoning, LLM_IF_OAI_Vision, LLM_IF_Outputs_Audio, LLM_IF_Outputs_Image, LLM_IF_Tools_WebSearch } from '~/common/stores/llms/llms.types';
+import { DLLM, DLLMId, getLLMContextTokens, getLLMMaxOutputTokens, getLLMPricing, isLLMHidden, LLM_IF_ANT_PromptCaching, LLM_IF_GEM_CodeExecution, LLM_IF_OAI_Complete, LLM_IF_OAI_Fn, LLM_IF_OAI_Json, LLM_IF_OAI_PromptCaching, LLM_IF_OAI_Realtime, LLM_IF_OAI_Reasoning, LLM_IF_OAI_Vision, LLM_IF_Outputs_Audio, LLM_IF_Outputs_Image, LLM_IF_Tools_WebSearch } from '~/common/stores/llms/llms.types';
 import { GoodTooltip } from '~/common/components/GoodTooltip';
 import { PhGearSixIcon } from '~/common/components/icons/phosphor/PhGearSixIcon';
 import { STAR_EMOJI, StarredToggle, starredToggleStyle } from '~/common/components/StarIcons';
@@ -81,7 +81,7 @@ function ModelItem(props: {
   // derived
   const { llm, onModelClicked, onModelSetHidden /*, onModelSetStarred*/ } = props;
 
-  const seemsFree = !!llm.pricing?.chat?._isFree;
+  const seemsFree = !!getLLMPricing(llm)?.chat?._isFree;
   const isNotSymlink = !llm.label.startsWith('🔗');
 
 
diff --git a/src/modules/llms/vendors/openrouter/OpenRouterServiceSetup.tsx b/src/modules/llms/vendors/openrouter/OpenRouterServiceSetup.tsx
index b9def18be..df839d2a7 100644
--- a/src/modules/llms/vendors/openrouter/OpenRouterServiceSetup.tsx
+++ b/src/modules/llms/vendors/openrouter/OpenRouterServiceSetup.tsx
@@ -7,6 +7,7 @@ import VisibilityOutlinedIcon from '@mui/icons-material/VisibilityOutlined';
 import type { DModelsServiceId } from '~/common/stores/llms/llms.service.types';
 import { AlreadySet } from '~/common/components/AlreadySet';
 import { FormInputKey } from '~/common/components/forms/FormInputKey';
+import { getLLMPricing } from '~/common/stores/llms/llms.types';
 import { InlineError } from '~/common/components/InlineError';
 import { Link } from '~/common/components/Link';
 import { SetupFormRefetchButton } from '~/common/components/forms/SetupFormRefetchButton';
@@ -53,7 +54,7 @@ export function OpenRouterServiceSetup(props: { serviceId: DModelsServiceId }) {
     const { updateLLM } = llmsStoreActions();
     llms
       .filter(llm => llm.sId === props.serviceId)
-      .filter(llm => llm.pricing?.chat?._isFree === false)
+      .filter(llm => getLLMPricing(llm)?.chat?._isFree === false)
       .forEach(llm => updateLLM(llm.id, { userHidden: true }));
   };
 
diff --git a/src/modules/llms/vendors/openrouter/openrouter.vendor.ts b/src/modules/llms/vendors/openrouter/openrouter.vendor.ts
index 9f92eb2da..20473ac3e 100644
--- a/src/modules/llms/vendors/openrouter/openrouter.vendor.ts
+++ b/src/modules/llms/vendors/openrouter/openrouter.vendor.ts
@@ -1,6 +1,8 @@
 import type { IModelVendor } from '../IModelVendor';
 import type { OpenAIAccessSchema } from '../../server/openai/openai.router';
 
+import { getLLMPricing } from '~/common/stores/llms/llms.types';
+
 import { ModelVendorOpenAI } from '../openai/openai.vendor';
 
 
@@ -51,7 +53,7 @@ export const ModelVendorOpenRouter: IModelVendor<DOpenRouterServiceSettings, Ope
   rateLimitChatGenerate: async (llm) => {
     const now = Date.now();
     const elapsed = now - nextGenerationTs;
-    const wait = llm.pricing?.chat?._isFree
+    const wait = getLLMPricing(llm)?.chat?._isFree
       ? 5000 + 100 /* 5 seconds for free call, plus some safety margin */
       : 100;