From 4bb505a13328169ed0ce962e67fbd8a6c082dbca Mon Sep 17 00:00:00 2001
From: Gurden Batra <gurden@darkmatterlabs.org>
Date: Fri, 12 Jun 2026 00:04:11 +0200
Subject: [PATCH] =?UTF-8?q?fix(llm):=20correct=20model=20cost=20table=20?=
 =?UTF-8?q?=E2=80=94=20Haiku=204.5=20and=20Opus=20were=20mispriced?=
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usage.ts priced Haiku 4.5 at Haiku-3 rates (25/125 micro-cents/1k =
$0.25/$1.25 per MTok) — actual Haiku 4.5 is $1/$5 per MTok. Opus was at
1500/7500 ($15/$75) — actual Opus 4.7/4.8 is $5/$25. The Settings usage
dashboard computes cost from this table at read time, so it was understating
extraction spend ~4x and overstating any Opus use ~3x.

Corrected to per-MTok×100 micro-cents/1k: Haiku 100/500, Opus 500/2500;
added the claude-haiku-4-5 alias and a claude-opus-4-8 row. Updated tests.
---
 src/lib/llm/__tests__/usage.test.ts | 13 ++++++++++---
 src/lib/llm/usage.ts                | 10 +++++++---
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/src/lib/llm/__tests__/usage.test.ts b/src/lib/llm/__tests__/usage.test.ts
index ff1ecc4..a620f46 100644
--- a/src/lib/llm/__tests__/usage.test.ts
+++ b/src/lib/llm/__tests__/usage.test.ts
@@ -3,10 +3,17 @@ import { estimateCostMicroCents } from '../usage';
 
 describe('estimateCostMicroCents', () => {
   it('estimates cost for Haiku model', () => {
-    // Haiku: $0.00025/1k input, $0.00125/1k output
-    // 1000 input + 1000 output = $0.00025 + $0.00125 = $0.0015 = 150 micro-cents
+    // Haiku 4.5: $1/MTok input, $5/MTok output → $0.001/1k in, $0.005/1k out
+    // 1000 input + 1000 output = $0.001 + $0.005 = $0.006 = 600 micro-cents
     const cost = estimateCostMicroCents('claude-haiku-4-5-20251001', 1000, 1000);
-    expect(cost).toBe(150);
+    expect(cost).toBe(600);
+  });
+
+  it('estimates cost for Opus model', () => {
+    // Opus 4.8: $5/MTok input, $25/MTok output → $0.005/1k in, $0.025/1k out
+    // 1000 input + 1000 output = $0.005 + $0.025 = $0.03 = 3000 micro-cents
+    const cost = estimateCostMicroCents('claude-opus-4-8', 1000, 1000);
+    expect(cost).toBe(3000);
   });
 
   it('estimates cost for Sonnet model', () => {
diff --git a/src/lib/llm/usage.ts b/src/lib/llm/usage.ts
index 69740a6..64b51c2 100644
--- a/src/lib/llm/usage.ts
+++ b/src/lib/llm/usage.ts
@@ -1,11 +1,15 @@
 import type { LLMResponse } from './index';
 
-// Cost in micro-cents per 1k tokens (1 micro-cent = $0.00001)
+// Cost in micro-cents per 1k tokens (1 micro-cent = $0.00001).
+// Per-1k micro-cents = (USD per 1M tokens) × 100. Rates per Anthropic pricing:
+//   Haiku 4.5  $1 / $5    Sonnet 4.6  $3 / $15    Opus 4.7/4.8  $5 / $25
 const MODEL_COSTS: Record<string, { inputPer1k: number; outputPer1k: number }> = {
-  'claude-haiku-4-5-20251001': { inputPer1k: 25, outputPer1k: 125 },
+  'claude-haiku-4-5-20251001': { inputPer1k: 100, outputPer1k: 500 },
+  'claude-haiku-4-5': { inputPer1k: 100, outputPer1k: 500 },
   'claude-sonnet-4-6': { inputPer1k: 300, outputPer1k: 1500 },
   'claude-sonnet-4-20250514': { inputPer1k: 300, outputPer1k: 1500 },
-  'claude-opus-4-7': { inputPer1k: 1500, outputPer1k: 7500 },
+  'claude-opus-4-8': { inputPer1k: 500, outputPer1k: 2500 },
+  'claude-opus-4-7': { inputPer1k: 500, outputPer1k: 2500 },
 };
 
 export function estimateCostMicroCents(