Google: Gemini 3.5 Flash

Name: Google: Gemini 3.5 Flash API pricing — cross-validated
Creator: llmburn
License: https://creativecommons.org/licenses/by/4.0/

Last Verified 2026-10-01 ✓ 3 independent sources agree context 1,048,576 JSON ↓

Pricing matrix USD per 1M tokens

Field	Consensus	Evidence
Input	$1.50	✓ 3 independent sources 3 sources
Output	$9	✓ 3 independent sources 3 sources
Cache read	$0.15	✓ 3 independent sources 3 sources
Cache write (5m)	$0.083	single source 2 sources
Cache write (1h)	Unverified（未验证，不填 0）	not published
Reasoning tokens	$9	single source 1 source

证据链：各源原值并列（audit trail，点击展开）

Field	Source	Raw value (USD/1M)	Independent	Observed
input	openrouter	1.5000	yes	2026-10-01 08:00
input	litellm	1.5000	yes	2026-10-01 08:00
input	litellm <span class="badge mute">mirror</span>	1.5000	no	2026-10-01 08:00
input	modelsdev	1.5000	yes	2026-10-01 08:00
input	modelsdev	1.5000	yes	2026-10-01 08:00
output	openrouter	9.0000	yes	2026-10-01 08:00
output	litellm	9.0000	yes	2026-10-01 08:00
output	litellm <span class="badge mute">mirror</span>	9.0000	no	2026-10-01 08:00
output	modelsdev	9.0000	yes	2026-10-01 08:00
output	modelsdev	9.0000	yes	2026-10-01 08:00
cache_read	openrouter	0.1500	yes	2026-10-01 08:00
cache_read	litellm	0.1500	yes	2026-10-01 08:00
cache_read	litellm <span class="badge mute">mirror</span>	0.1500	no	2026-10-01 08:00
cache_read	modelsdev	0.1500	yes	2026-10-01 08:00
cache_read	modelsdev	0.1500	yes	2026-10-01 08:00
cache_write	openrouter	0.0833	yes	2026-10-01 08:00
cache_write	litellm <span class="badge mute">mirror</span>	0.0833	no	2026-10-01 08:00
reasoning_out	openrouter	9.0000	yes	2026-10-01 08:00

This is an estimate based on public sticker prices, not your invoice. Machine-readable: /data/v1/pricing/google-gemini-3-5-flash.json