diff --git a/docs/project/ROADMAP.md b/docs/project/ROADMAP.md
index 20256d2..281bfc8 100644
--- a/docs/project/ROADMAP.md
+++ b/docs/project/ROADMAP.md
@@ -6,6 +6,14 @@ Directional roadmap for AgentMonitor. This is a planning snapshot, not a release
 
 Concise record of shipped work that has left `BACKLOG.md`. Newest first.
 
+- Cache-inclusive unknown-pricing visibility (2026-08-04) — *What:* Top Models now
+  offers an All tokens view that includes input, output, cache-read, and cache-write
+  traffic; model tables use the same total. The Usage page persistently identifies
+  pricing-incomplete models, their cache-inclusive observed tokens, and their event count
+  without fabricating a cost. The warning stays visible when a formerly unknown model
+  receives pricing but its historical $0 rows still need `amon costs recalc`. *Why:* a
+  cache-heavy new model can otherwise vanish from the default Cost view before or after
+  its pricing record arrives.
 - Configurable Claude history root (2026-07-29) — *What:*
   `AGENTMONITOR_CLAUDE_DIR` now supplies one Claude data root to startup sync,
   live and periodic watcher discovery, automatic and historical event import,
diff --git a/docs/system/FEATURES.md b/docs/system/FEATURES.md
index f1eb773..1168173 100644
--- a/docs/system/FEATURES.md
+++ b/docs/system/FEATURES.md
@@ -143,6 +143,7 @@ Product-surface reference for AgentMonitor.
 - Summary totals, daily series, project/model/tier/agent attribution, and top-session views all use cost/token-bearing event rows as their source of truth.
 - Codex aggregate usage reconciles overlapping telemetry sources: when a Codex session has imported JSONL usage and OTEL usage rows, imported usage is treated as authoritative and overlapping OTEL usage rows are ignored for rollups. Raw events remain queryable in monitor/session history.
 - Usage models are classified at query time into canonical model, provider, family, tier, lifecycle, and pricing-status fields. Unknown and deprecated models remain visible in responses.
+- The Usage page’s Top Models **All tokens** view includes input, output, cache-read, and cache-write traffic. A persistent pricing warning names affected models and their observed token volume when pricing is unknown or known pricing has not yet been applied to historical zero-cost rows; it keeps cost totals explicitly non-estimated and directs the operator to `amon costs recalc` for the latter state.
 - Usage endpoints accept optional `model`, `provider`, and `tier` filters in addition to date, project, and agent filters. Classification filters are applied consistently before summary, daily, attribution, tier, agent, and top-session panels aggregate.
 - Usage summary includes `prior_total_cost_usd` and `cost_delta_pct` for the immediately preceding same-length date range when a valid current range is supplied.
 - Usage budget reports live at `/api/v2/usage/budgets`. They read an optional local JSON config, reuse usage filters to compute current spend, and return alert states without blocking or enforcing agent activity.
diff --git a/frontend/src/lib/components/usage/UsageBreakdownTable.svelte b/frontend/src/lib/components/usage/UsageBreakdownTable.svelte
index b10c7a9..b75d3bc 100644
--- a/frontend/src/lib/components/usage/UsageBreakdownTable.svelte
+++ b/frontend/src/lib/components/usage/UsageBreakdownTable.svelte
@@ -36,6 +36,11 @@
     return base;
   }
 
+  function tokenTotal(row: UsageProjectBreakdown | UsageModelBreakdown | UsageTierBreakdown | UsageAgentBreakdown): number {
+    const base = row.input_tokens + row.output_tokens;
+    return kind === 'model' ? base + row.cache_read_tokens + row.cache_write_tokens : base;
+  }
+
   function handleSelect(row: UsageProjectBreakdown | UsageModelBreakdown | UsageTierBreakdown | UsageAgentBreakdown): void {
     if (kind === 'project' && 'project' in row) {
       void usage.setProject(row.project === 'unknown' ? '' : row.project);
@@ -90,7 +95,7 @@
             <div class="text-right">
               <div class="tabular font-mono text-body text-ok">{formatCost(row.cost_usd)}</div>
               <div class="mt-0.5 tabular font-mono text-meta text-text-faint">
-                {formatNumber(row.input_tokens + row.output_tokens)} tokens
+                {formatNumber(tokenTotal(row))} {kind === 'model' ? 'observed tokens' : 'tokens'}
               </div>
             </div>
           </div>
diff --git a/frontend/src/lib/components/usage/UsagePage.svelte b/frontend/src/lib/components/usage/UsagePage.svelte
index af27517..449bcd2 100644
--- a/frontend/src/lib/components/usage/UsagePage.svelte
+++ b/frontend/src/lib/components/usage/UsagePage.svelte
@@ -3,6 +3,7 @@
   import { usage } from '../../stores/usage.svelte';
   import { Select } from '../ui';
   import UsageCoverageBanner from './UsageCoverageBanner.svelte';
+  import UsageUnpricedWarning from './UsageUnpricedWarning.svelte';
   import UsageSummaryCards from './UsageSummaryCards.svelte';
   import UsageTimeline from './UsageTimeline.svelte';
   import UsageBreakdownTable from './UsageBreakdownTable.svelte';
@@ -25,9 +26,9 @@
 </script>
 
 <main class="flex-1 overflow-y-auto p-4 sm:p-6 space-y-4">
-  <!-- Cost-specific facets; shared date/project/agent live in the Analytics bar. -->
+  <!-- Usage-specific facets; shared date/project/agent live in the Analytics bar. -->
   <div class="flex flex-wrap items-center gap-2">
-    <span class="text-meta uppercase tracking-wide text-text-faint">Cost facets</span>
+    <span class="text-meta uppercase tracking-wide text-text-faint">Usage facets</span>
     <Select
       value={usage.provider}
       options={usage.providerOptions}
@@ -51,6 +52,7 @@
     />
   </div>
 
+  <UsageUnpricedWarning />
   <UsageCoverageBanner />
   <UsageSummaryCards />
 
diff --git a/frontend/src/lib/components/usage/UsageTopModels.svelte b/frontend/src/lib/components/usage/UsageTopModels.svelte
index 9a1ade3..39a00a4 100644
--- a/frontend/src/lib/components/usage/UsageTopModels.svelte
+++ b/frontend/src/lib/components/usage/UsageTopModels.svelte
@@ -92,12 +92,12 @@
     <div>
       <h3 class="text-h3">Top Models</h3>
       <p class="mt-0.5 text-meta text-text-muted">
-        Model mix by day. Click a day to drill the page into it.
+        Model mix by day. All tokens include cache reads and writes. Click a day to drill the page into it.
       </p>
     </div>
 
     <div class="flex shrink-0 rounded-sm border border-line" role="group" aria-label="Metric">
-      {#each [{ id: 'cost', label: 'Cost' }, { id: 'tokens', label: 'Tokens' }] as option}
+      {#each [{ id: 'cost', label: 'Cost' }, { id: 'tokens', label: 'All tokens' }] as option}
         <button
           class="px-2 py-1 text-meta transition-colors first:rounded-l-sm last:rounded-r-sm
             {metric === option.id ? 'bg-surface-2 text-text' : 'text-text-faint hover:text-text-muted'}"
diff --git a/frontend/src/lib/components/usage/UsageUnpricedWarning.svelte b/frontend/src/lib/components/usage/UsageUnpricedWarning.svelte
new file mode 100644
index 0000000..07a3784
--- /dev/null
+++ b/frontend/src/lib/components/usage/UsageUnpricedWarning.svelte
@@ -0,0 +1,35 @@
+<script lang="ts">
+  import { usage } from '../../stores/usage.svelte';
+  import { formatNumber } from '../../format';
+  import { summarizeIncompleteCostUsage } from './unpriced-usage';
+
+  const summary = $derived(summarizeIncompleteCostUsage(usage.models));
+  const warningMessage = $derived.by(() => {
+    if (!summary) return '';
+    if (summary.unknown_pricing_model_count > 0 && summary.unrecalculated_model_count > 0) {
+      return 'Some model pricing is unknown, and some historical costs have not been recalculated. Cost totals may be incomplete.';
+    }
+    if (summary.unknown_pricing_model_count > 0) {
+      return 'Model pricing is unknown. Cost totals may be incomplete until prices are added.';
+    }
+    return 'Known model pricing has not been applied to some historical usage. Cost totals may be incomplete until you run amon costs recalc.';
+  });
+  const modelPreview = $derived.by(() => {
+    if (!summary) return '';
+    const names = summary.models.slice(0, 3).join(', ');
+    const remaining = summary.models.length - 3;
+    return remaining > 0 ? `${names} +${remaining} more` : names;
+  });
+</script>
+
+{#if summary}
+  <div class="flex items-start gap-2 rounded-lg border border-warn/30 bg-warn/10 px-4 py-3 text-meta text-text-muted" role="status">
+    <span class="mt-1 inline-block h-1.5 w-1.5 shrink-0 rounded-full bg-warn" aria-hidden="true"></span>
+    <div>
+      <p class="text-text">{warningMessage}</p>
+      <p class="mt-1">
+        {formatNumber(summary.observed_tokens)} observed tokens across {formatNumber(summary.usage_events)} usage events from {formatNumber(summary.model_count)} model{summary.model_count === 1 ? '' : 's'}: <span class="font-mono text-text">{modelPreview}</span>
+      </p>
+    </div>
+  </div>
+{/if}
diff --git a/frontend/src/lib/components/usage/model-colors.ts b/frontend/src/lib/components/usage/model-colors.ts
index 5c96eb0..48c1c36 100644
--- a/frontend/src/lib/components/usage/model-colors.ts
+++ b/frontend/src/lib/components/usage/model-colors.ts
@@ -14,6 +14,8 @@ export interface ModelSliceLike {
   cost_usd: number;
   input_tokens: number;
   output_tokens: number;
+  cache_read_tokens?: number;
+  cache_write_tokens?: number;
 }
 
 export interface ModelDailyPointLike {
@@ -47,7 +49,9 @@ if (TOP_N > SERIES_COLORS.length) {
 export const METRICS: UsageMetric[] = ['cost', 'tokens'];
 
 export function measure(slice: ModelSliceLike, metric: UsageMetric): number {
-  return metric === 'cost' ? slice.cost_usd : slice.input_tokens + slice.output_tokens;
+  return metric === 'cost'
+    ? slice.cost_usd
+    : slice.input_tokens + slice.output_tokens + (slice.cache_read_tokens ?? 0) + (slice.cache_write_tokens ?? 0);
 }
 
 /** Models ranked over the whole range, so a model keeps its stack slot across days. */
@@ -70,7 +74,7 @@ export function rankModels(points: readonly ModelDailyPointLike[], metric: Usage
  * A model's hue must survive the metric toggle, so colors cannot be handed out by
  * rank — that repaints every survivor the moment the ranking changes. But they also
  * cannot be keyed to the cost ranking alone: a token-heavy, cheap model can enter the
- * Tokens top-N while sitting outside it, and would fall through to Other's gray,
+ * All-tokens top-N while sitting outside it, and would fall through to Other's gray,
  * putting two different categories on one color.
  *
  * So color the union of every metric's top-N — every model that can actually appear —
diff --git a/frontend/src/lib/components/usage/unpriced-usage.ts b/frontend/src/lib/components/usage/unpriced-usage.ts
new file mode 100644
index 0000000..e2486f2
--- /dev/null
+++ b/frontend/src/lib/components/usage/unpriced-usage.ts
@@ -0,0 +1,43 @@
+export interface ModelUsageLike {
+  model: string;
+  pricing_status: 'known' | 'deprecated' | 'unknown';
+  cost_usd: number;
+  input_tokens: number;
+  output_tokens: number;
+  cache_read_tokens: number;
+  cache_write_tokens: number;
+  usage_events: number;
+}
+
+export interface IncompleteCostUsageSummary {
+  model_count: number;
+  unknown_pricing_model_count: number;
+  unrecalculated_model_count: number;
+  usage_events: number;
+  observed_tokens: number;
+  models: string[];
+}
+
+export function observedTokens(model: Pick<ModelUsageLike, 'input_tokens' | 'output_tokens' | 'cache_read_tokens' | 'cache_write_tokens'>): number {
+  return model.input_tokens + model.output_tokens + model.cache_read_tokens + model.cache_write_tokens;
+}
+
+export function summarizeIncompleteCostUsage(models: readonly ModelUsageLike[]): IncompleteCostUsageSummary | null {
+  const affectedModels = models
+    .filter(model => (
+      model.pricing_status === 'unknown'
+      || (model.cost_usd === 0 && observedTokens(model) > 0)
+    ))
+    .sort((left, right) => observedTokens(right) - observedTokens(left) || left.model.localeCompare(right.model));
+
+  if (affectedModels.length === 0) return null;
+
+  return {
+    model_count: affectedModels.length,
+    unknown_pricing_model_count: affectedModels.filter(model => model.pricing_status === 'unknown').length,
+    unrecalculated_model_count: affectedModels.filter(model => model.pricing_status !== 'unknown').length,
+    usage_events: affectedModels.reduce((total, model) => total + model.usage_events, 0),
+    observed_tokens: affectedModels.reduce((total, model) => total + observedTokens(model), 0),
+    models: affectedModels.map(model => model.model),
+  };
+}
diff --git a/src/pricing/data/claude.json b/src/pricing/data/claude.json
index 10e61f3..dd83cf7 100644
--- a/src/pricing/data/claude.json
+++ b/src/pricing/data/claude.json
@@ -1,6 +1,6 @@
 {
   "provider": "anthropic",
-  "lastUpdated": "2026-07-08T00:00:00Z",
+  "lastUpdated": "2026-08-04T00:00:00Z",
   "models": {
     "claude-fable-5": {
       "aliases": [],
@@ -10,6 +10,14 @@
       "cacheWriteCostPerMTok": 12.5,
       "deprecated": false
     },
+    "claude-opus-5": {
+      "aliases": [],
+      "inputCostPerMTok": 5,
+      "outputCostPerMTok": 25,
+      "cacheReadCostPerMTok": 0.5,
+      "cacheWriteCostPerMTok": 6.25,
+      "deprecated": false
+    },
     "claude-opus-4-8": {
       "aliases": [],
       "inputCostPerMTok": 5,
diff --git a/tests/pricing.test.ts b/tests/pricing.test.ts
index ffd67cb..65c297f 100644
--- a/tests/pricing.test.ts
+++ b/tests/pricing.test.ts
@@ -54,6 +54,17 @@ describe('PricingRegistry', () => {
       assert.equal(pricing.deprecated, false);
     });
 
+    test('finds Claude Opus 5 and applies its published base and cache rates', () => {
+      const pricing = registry.lookup('claude-opus-5');
+      assert.ok(pricing);
+      assert.equal(pricing.provider, 'anthropic');
+      assert.equal(pricing.inputCostPerToken, 5 / 1_000_000);
+      assert.equal(pricing.outputCostPerToken, 25 / 1_000_000);
+      assert.equal(pricing.cacheReadCostPerToken, 0.5 / 1_000_000);
+      assert.equal(pricing.cacheWriteCostPerToken, 6.25 / 1_000_000);
+      assert.equal(pricing.deprecated, false);
+    });
+
     test('finds Claude Fable 5 with the published per-MTok rates', () => {
       const pricing = registry.lookup('claude-fable-5');
       assert.ok(pricing);
@@ -224,6 +235,15 @@ describe('PricingRegistry', () => {
       assert.equal(c.pricing_status, 'known');
     });
 
+    test('classifies Claude Opus 5 as a known anthropic/opus tier', () => {
+      const c = classifyModel('claude-opus-5');
+      assert.equal(c.canonical_model, 'claude-opus-5');
+      assert.equal(c.provider, 'anthropic');
+      assert.equal(c.family, 'claude');
+      assert.equal(c.tier, 'opus');
+      assert.equal(c.pricing_status, 'known');
+    });
+
     test('classifies the Antigravity flash id/display via gemini-3.5-flash', () => {
       for (const id of ['gemini-3-flash-a', 'Gemini 3.5 Flash (Medium)']) {
         const c = classifyModel(id);
diff --git a/tests/unpriced-usage.test.ts b/tests/unpriced-usage.test.ts
new file mode 100644
index 0000000..0b7b368
--- /dev/null
+++ b/tests/unpriced-usage.test.ts
@@ -0,0 +1,95 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import { summarizeIncompleteCostUsage } from '../frontend/src/lib/components/usage/unpriced-usage.js';
+
+test('summarizes cache-inclusive usage for unknown-priced models', () => {
+  const summary = summarizeIncompleteCostUsage([
+    {
+      model: 'known-model',
+      pricing_status: 'known',
+      cost_usd: 0.01,
+      input_tokens: 100,
+      output_tokens: 50,
+      cache_read_tokens: 1_000,
+      cache_write_tokens: 10,
+      usage_events: 2,
+    },
+    {
+      model: 'small-unknown',
+      pricing_status: 'unknown',
+      cost_usd: 0,
+      input_tokens: 10,
+      output_tokens: 5,
+      cache_read_tokens: 20,
+      cache_write_tokens: 2,
+      usage_events: 3,
+    },
+    {
+      model: 'cache-heavy-unknown',
+      pricing_status: 'unknown',
+      cost_usd: 0,
+      input_tokens: 1,
+      output_tokens: 2,
+      cache_read_tokens: 10_000,
+      cache_write_tokens: 500,
+      usage_events: 7,
+    },
+  ]);
+
+  assert.deepEqual(summary, {
+    model_count: 2,
+    unknown_pricing_model_count: 2,
+    unrecalculated_model_count: 0,
+    usage_events: 10,
+    observed_tokens: 10_540,
+    models: ['cache-heavy-unknown', 'small-unknown'],
+  });
+});
+
+test('does not warn when every model has known or deprecated pricing', () => {
+  assert.equal(summarizeIncompleteCostUsage([
+    {
+      model: 'known-model',
+      pricing_status: 'known',
+      cost_usd: 0.000005,
+      input_tokens: 1,
+      output_tokens: 0,
+      cache_read_tokens: 0,
+      cache_write_tokens: 0,
+      usage_events: 1,
+    },
+    {
+      model: 'deprecated-model',
+      pricing_status: 'deprecated',
+      cost_usd: 0.000005,
+      input_tokens: 1,
+      output_tokens: 0,
+      cache_read_tokens: 0,
+      cache_write_tokens: 0,
+      usage_events: 1,
+    },
+  ]), null);
+});
+
+test('retains known-priced usage with zero stored cost until recalculation', () => {
+  assert.deepEqual(summarizeIncompleteCostUsage([
+    {
+      model: 'claude-opus-5',
+      pricing_status: 'known',
+      cost_usd: 0,
+      input_tokens: 50,
+      output_tokens: 100,
+      cache_read_tokens: 1_000,
+      cache_write_tokens: 25,
+      usage_events: 4,
+    },
+  ]), {
+    model_count: 1,
+    unknown_pricing_model_count: 0,
+    unrecalculated_model_count: 1,
+    usage_events: 4,
+    observed_tokens: 1_175,
+    models: ['claude-opus-5'],
+  });
+});
diff --git a/tests/usage-model-colors.test.ts b/tests/usage-model-colors.test.ts
index b820445..58b60c8 100644
--- a/tests/usage-model-colors.test.ts
+++ b/tests/usage-model-colors.test.ts
@@ -51,6 +51,22 @@ describe('usage top models: series selection', () => {
     const points = [day(slice('opus', 5, 0), slice('ghost', 0, 0))];
     assert.deepEqual(rankModels(points, 'cost'), ['opus']);
   });
+
+  test('ranks cache-heavy unknown-priced models by all observed tokens', () => {
+    const points = [day(
+      slice('known-model', 10, 100),
+      {
+        model: 'unknown-model',
+        cost_usd: 0,
+        input_tokens: 1,
+        output_tokens: 1,
+        cache_read_tokens: 10_000,
+        cache_write_tokens: 500,
+      } as ModelDailyPointLike['models'][number],
+    )];
+
+    assert.equal(rankModels(points, 'tokens')[0], 'unknown-model');
+  });
 });
 
 describe('usage top models: color assignment', () => {