From d259b24edeb8f40f126974d058766d236db2c824 Mon Sep 17 00:00:00 2001
From: Teknium <127238744+teknium1@users.noreply.github.com>
Date: Tue, 28 Jul 2026 10:22:59 -0700
Subject: [PATCH] feat(pricing): add gemini-3.6-flash and gemini-3.5-flash-lite
 official snapshot entries
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Follow-up to the #60063 salvage: the curated gemini list now carries
gemini-3.6-flash (aux default, #70416) and the vertex list carries
gemini-3.5-flash-lite (#68767) — both need snapshot pricing so direct
Gemini/Vertex sessions don't report cost=unknown.

Rates verified against https://ai.google.dev/gemini-api/docs/pricing
(2026-07-28): 3.6-flash $1.50/$7.50, cache read $0.15;
3.5-flash-lite $0.30/$2.50, cache read $0.03.
---
 agent/usage_pricing.py | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/agent/usage_pricing.py b/agent/usage_pricing.py
index ccb3560a9768..b7982e46ab05 100644
--- a/agent/usage_pricing.py
+++ b/agent/usage_pricing.py
@@ -511,6 +511,17 @@ _OFFICIAL_DOCS_PRICING: Dict[tuple[str, str], PricingEntry] = {
         pricing_version="deepseek-pricing-2026-07",
     ),
     # Google Gemini
+    (
+        "google",
+        "gemini-3.6-flash",
+    ): PricingEntry(
+        input_cost_per_million=Decimal("1.50"),
+        output_cost_per_million=Decimal("7.50"),
+        cache_read_cost_per_million=Decimal("0.15"),
+        source="official_docs_snapshot",
+        source_url="https://ai.google.dev/gemini-api/docs/pricing",
+        pricing_version="google-pricing-2026-07-28",
+    ),
     (
         "google",
         "gemini-3.5-flash",
@@ -522,6 +533,17 @@ _OFFICIAL_DOCS_PRICING: Dict[tuple[str, str], PricingEntry] = {
         source_url="https://ai.google.dev/pricing",
         pricing_version="google-pricing-2026-07-07",
     ),
+    (
+        "google",
+        "gemini-3.5-flash-lite",
+    ): PricingEntry(
+        input_cost_per_million=Decimal("0.30"),
+        output_cost_per_million=Decimal("2.50"),
+        cache_read_cost_per_million=Decimal("0.03"),
+        source="official_docs_snapshot",
+        source_url="https://ai.google.dev/gemini-api/docs/pricing",
+        pricing_version="google-pricing-2026-07-28",
+    ),
     (
         "google",
         "gemini-3.1-pro",