Gemini 3.5 Flash

Gemini 3.5 Flash is Google's high-efficiency multimodal model, bringing near-Pro level coding and reasoning at Flash-tier cost and speed. It is highly optimized for coding proficiency and parallel agentic execution loops, supporting text, image, video, audio, and PDF inputs.

Defaults to medium thinking effort for faster and more cost-efficient responses, with full support for thinking levels (minimal, low, medium, high) for fine-grained cost/performance trade-offs.

google/gemini-3.5-flash

Organization: Google
Family: gemini-flash
Providers: 32
Context: 1,048,576
Output limit: 65,536
Knowledge: 2025-01
Release: 2026-05-19
Updated: 2026-05-19
Weights: Closed
Input: text, image, video, audio, pdf
Output: text
Capabilities: Tools, Reasoning, Structured, Temperature

Providers

Compare every cataloged offer for this model, including its provider, route, token limits, price, and capabilities.

45 offers · USD per million tokens

Provider	Model ID	Context	Output	Input / output · 1M	Reasoning	Tools	Structured	Details
302.AI	gemini-3.5-flash-thinking	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
302.AI	gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Abacus	gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
AIHubMix	gemini-3.5-flash	1,000,000	64,000	$1.50 / $9.00	Yes	Yes	Yes	View
Cortecs	gemini-3.5-flash	1,048,576	65,535	$1.649 / $9.899	Yes	Yes	Yes	View
CrossModel	gemini/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
DevPass (LLM Gateway)	gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Eden AI	google/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Eden AI	vertex/gemini-3.5-flash@us	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Eden AI	vertex/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Eden AI	vertex/gemini-3.5-flash@eu	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
FastRouter	google/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
GitHub Copilot	gemini-3.5-flash	200,000	64,000	$1.50 / $9.00	Yes	Yes	Yes	View
Impossibl	google/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Kenari	gemini-3-5-flash	1,048,576	65,536	$0.00 / $0.00	Yes	Yes	Yes	View
Kilo Gateway	google/gemini-3.5-flash	1,048,576	65,536	$0.75 / $4.50	Yes	Yes	Yes	View
LLM Gateway	google-ai-studio/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
LLM Gateway	google-vertex/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Merge Gateway	google/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
NanoGPT	google/gemini-3.5-flash-thinking	1,048,576	65,536	$1.50 / $9.00	Yes	No	No	View
NanoGPT	google/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
NEAR AI Cloud	google/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Neon	gemini-3-5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Ofox	google/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Googlevia OpenRouter	google/gemini-3.5-flash unknown	1,048,576	65,536	$1.65 / $9.90	Yes	Yes	Yes	View
Googlevia OpenRouter	google/gemini-3.5-flash unknown	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Googlevia OpenRouter	google/gemini-3.5-flash unknown	1,048,576	65,536	$0.75 / $4.50	Yes	Yes	Yes	View
Googlevia OpenRouter	google/gemini-3.5-flash unknown	1,048,576	65,536	$2.70 / $16.20	Yes	Yes	Yes	View
Google AI Studiovia OpenRouter	google/gemini-3.5-flash unknown	1,048,576	65,536	$2.70 / $16.20	Yes	Yes	Yes	View
Google AI Studiovia OpenRouter	google/gemini-3.5-flash unknown	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Google AI Studiovia OpenRouter	google/gemini-3.5-flash unknown	1,048,576	65,536	$0.75 / $4.50	Yes	Yes	Yes	View
Opper	gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
OrcaRouter	google/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Pioneer	gemini-3.5-flash	1,000,000	64,000	$1.50 / $9.00	Yes	Yes	Yes	View
Poe	google/gemini-3.5-flash	1,048,576	65,536	$1.5152 / $9.0909	Yes	Yes	Yes	View
Requesty	gemini-3.5-flash@eu	1,048,576	65,535	$1.65 / $9.90	Yes	Yes	Yes	View
Requesty	gemini-3.5-flash	1,048,576	65,535	$1.50 / $9.00	Yes	Yes	Yes	View
SAP AI Core	gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Tempr Gateway	google/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
UnoRouter	gemini-3.5-flash	1,048,576	65,536	$0.1857 / $1.1142	Yes	Yes	Yes	View
Venice AI	gemini-3-5-flash	1,000,000	65,536	$1.55 / $9.45	Yes	Yes	Yes	View
Vercel AI Gateway	google/gemini-3.5-flash	1,000,000	64,000	$1.50 / $9.00	Yes	Yes	Yes	View
Vertex	gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View
Xpersona	gemini-3.5-flash	1,000,000	128,000	$1.55 / $12.20	Yes	Yes	Yes	View
ZenMux	google/gemini-3.5-flash	1,048,576	65,536	$1.50 / $9.00	Yes	Yes	Yes	View

Prices and limits apply to each offer. A dash means the value is not provided. OpenRouter offers show the hosting provider and routing channel separately.

Pricing

Compare token rates and cache charges across available routes and hosting configurations.

USD per million tokens

Input from$0.00Per 1M input tokens

Output from$0.00Per 1M output tokens

Available offers45Across 32 providers

Lowest listed input and output prices across the offers above; they may belong to different providers. These are base rates, before conditional pricing, discounts or additional fees.

Endpoint price comparisonLatest observed snapshot · 7 lowest-priced configurations

InputOutput

Googlegoogle-vertex/global/flex

$0.75$4.50

Google AI Studiogoogle-ai-studio/flex

$0.75$4.50

Googlegoogle-vertex/global

$1.50$9.00

Google AI Studiogoogle-ai-studio

$1.50$9.00

Googlegoogle-vertex/us

$1.65$9.90

Googlegoogle-vertex/global/priority

$2.70$16.20

Google AI Studiogoogle-ai-studio/priority

$2.70$16.20

google/gemini-3.5-flashObserved Oct 4, 2026, 11:31 AM UTC

Input: $1.50
Output: $9.00
Cache read: $0.15
Cache write: $0.083333

Additional fees and pricing conditions

audio: $0.000003 / audio token
image: $0.0000015 / image
web search: $0.014 / search
input audio cache: $0.0000003 / audio token
internal reasoning: $0.000009 / reasoning token

Hosting prices through OpenRouter All endpoints and cache rates

Endpoint	Input / 1M	Output / 1M	Cache read / 1M	Cache write / 1M
Googlegoogle-vertex/us	$1.65	$9.90	$0.165	$0.083333
Googlegoogle-vertex/global	$1.50	$9.00	$0.15	$0.083333
Googlegoogle-vertex/global/flex	$0.75	$4.50	$0.075	$0.041667
Googlegoogle-vertex/global/priority	$2.70	$16.20	$0.27	$0.15
Google AI Studiogoogle-ai-studio/priority	$2.70	$16.20	$0.27	$0.15
Google AI Studiogoogle-ai-studio	$1.50	$9.00	$0.15	$0.083333
Google AI Studiogoogle-ai-studio/flex	$0.75	$4.50	$0.075	$0.041667

Each row is a hosting configuration. Open an offer in Providers for its full pricing conditions and additional fees. Endpoint observations may differ from the routing catalog's base price.

Performance

Review reported latency and output-throughput percentiles from the latest observed rolling window.

Latest 30-minute observation

Time to first token · milliseconds

Latency distributionRolling 30-minute snapshot · 6 endpoints

P50P75P90P99

Googlegoogle-vertex/global

1,842–5,205.04 ms

Googlegoogle-vertex/global/flex

12,849–13,708.29 ms

Googlegoogle-vertex/global/priority

1,022–2,107.41 ms

Google AI Studiogoogle-ai-studio/priority

1,254–2,203 ms

Google AI Studiogoogle-ai-studio

1,405–34,135.6 ms

Google AI Studiogoogle-ai-studio/flex

1,233–6,435.68 ms

All latency percentiles 6 endpoints

Endpoint	P50	P75	P90	P99
Googlegoogle-vertex/global	1,842 ms	2,349 ms	2,782.9 ms	5,205.04 ms
Googlegoogle-vertex/global/flex	12,849 ms	13,163.25 ms	13,503.9 ms	13,708.29 ms
Googlegoogle-vertex/global/priority	1,022 ms	1,236 ms	1,533.9 ms	2,107.41 ms
Google AI Studiogoogle-ai-studio/priority	1,254 ms	1,685 ms	1,820.8 ms	2,203 ms
Google AI Studiogoogle-ai-studio	1,405 ms	1,855 ms	2,741.6 ms	34,135.6 ms
Google AI Studiogoogle-ai-studio/flex	1,233 ms	1,500.5 ms	2,047.4 ms	6,435.68 ms

Output throughput · tokens per second

Throughput distributionRolling 30-minute snapshot · 6 endpoints

P50P75P90P99

Googlegoogle-vertex/global

127–248 t/s

Googlegoogle-vertex/global/flex

6–106.94 t/s

Googlegoogle-vertex/global/priority

77–232.18 t/s

Google AI Studiogoogle-ai-studio/priority

97–253.84 t/s

Google AI Studiogoogle-ai-studio

163–295 t/s

Google AI Studiogoogle-ai-studio/flex

115–196.26 t/s

All throughput percentiles 6 endpoints

Endpoint	P50	P75	P90	P99
Googlegoogle-vertex/global	127 t/s	164 t/s	189 t/s	248 t/s
Googlegoogle-vertex/global/flex	6 t/s	57.5 t/s	88.4 t/s	106.94 t/s
Googlegoogle-vertex/global/priority	77 t/s	99.5 t/s	124.4 t/s	232.18 t/s
Google AI Studiogoogle-ai-studio/priority	97 t/s	168 t/s	215 t/s	253.84 t/s
Google AI Studiogoogle-ai-studio	163 t/s	203.5 t/s	238 t/s	295 t/s
Google AI Studiogoogle-ai-studio/flex	115 t/s	121 t/s	127 t/s	196.26 t/s

Percentiles describe the observed request distribution. These are snapshots of a rolling window, not a historical time series.

Uptime

Compare successful request rates across the latest 5-minute, 30-minute, and 24-hour observations.

Successful requests by window

Availability by endpointCurrent overlapping windows · 7 endpoints

Endpoint5 minutes30 minutes24 hours

Googlegoogle-vertex/usObserved Oct 4, 2026, 11:31 AM UTC

—

100%

Googlegoogle-vertex/globalObserved Oct 4, 2026, 11:31 AM UTC

99.09%

99.71%

99.81%

Googlegoogle-vertex/global/flexObserved Oct 4, 2026, 11:31 AM UTC

—

100%

Googlegoogle-vertex/global/priorityObserved Oct 4, 2026, 11:31 AM UTC

—

100%

99.97%

Google AI Studiogoogle-ai-studio/priorityObserved Oct 4, 2026, 11:31 AM UTC

—

99.99%

Google AI Studiogoogle-ai-studioObserved Oct 4, 2026, 11:31 AM UTC

100%

99.88%

99.87%

Google AI Studiogoogle-ai-studio/flexObserved Oct 4, 2026, 11:31 AM UTC

—

99.96%

Reported by OpenRouter at the time of collection; rate-limited requests are excluded. A dash means no measurement was reported. This is not a live availability check.

Benchmarks

Review attributed evaluation results on each source's original scale.

External evaluations

google/gemini-3.5-flashObserved Oct 4, 2026, 11:31 AM UTC

Benchmark profileArtificial Analysis · shared source scale from 0 to 80

Coding

70.1

Agentic

Intelligence

32.6

Design Arena	Category	Elo	Win rate	Rank
agents	agenticgamedev	1,180	55.4%	12
agents	agentichtmlslides	1,162	45.8%	6
agents	agenticslides	1,244	57.5%	3
agents	agenticslides(html)	1,162	45.7%	6
agents	agenticslides(python-pptx)	1,242	57.8%	2
agents	androidnative	1,199	57.7%	14
agents	fullstack	1,195	56.2%	19
agents	godotgamedev	1,098	43%	30
agents	htmlslides	1,142	46.5%	19
agents	mobileapps	1,169	51%	21
agents	pptxslides	1,244	57.7%	2
agents	python-pptxslides	1,247	57.4%	9
agents	webapps	1,196	52.6%	20
models	3d	1,260	56.4%	27
models	asciiart	1,265	59%	16
models	codecategories	1,271	54.3%	27
models	dataviz	1,243	52.9%	36
models	gamedev	1,275	53%	24
models	svg	1,255	59%	13
models	uicomponent	1,281	55.1%	24
models	website	1,272	53.9%	27

Sources: Artificial Analysis and Design Arena, via OpenRouter. Scores retain their original scales and are not OpenAI Suite ratings.

Detailed evaluations

Evaluation scoresAccuracy or item F1 · higher is better

tau bench verified airlineGoogle: Gemini 3.5 Flash

73.111%

gpqa diamondGoogle: Gemini 3.5 Flash

92.593%

Evaluation	Configuration	Source	Results	Details
models · svg	Gemini 3.5 Flashgoogle/gemini-3.5-flash-20260519	Design Arena	1,255 Elo	Details
models · gamedev	Gemini 3.5 Flashgoogle/gemini-3.5-flash-20260519	Design Arena	1,275 Elo	Details
models · 3d	Gemini 3.5 Flashgoogle/gemini-3.5-flash-20260519	Design Arena	1,260 Elo	Details
models · website	Gemini 3.5 Flashgoogle/gemini-3.5-flash-20260519	Design Arena	1,272 Elo	Details
models · uicomponent	Gemini 3.5 Flashgoogle/gemini-3.5-flash-20260519	Design Arena	1,281 Elo	Details
Composite indices	Gemini 3.5 Flash (high)google/gemini-3.5-flash-20260519	Artificial Analysis	Intelligence 32.6 · Coding 70.1 · Agentic 26	Details
tau bench verified airline	Google: Gemini 3.5 Flashgoogle/gemini-3.5-flash-20260519	OpenRouter	73.111%	Details
models · asciiart	Gemini 3.5 Flashgoogle/gemini-3.5-flash-20260519	Design Arena	1,265 Elo	Details
models · dataviz	Gemini 3.5 Flashgoogle/gemini-3.5-flash-20260519	Design Arena	1,243 Elo	Details
models · codecategories	Gemini 3.5 Flashgoogle/gemini-3.5-flash-20260519	Design Arena	1,271 Elo	Details
gpqa diamond	Google: Gemini 3.5 Flashgoogle/gemini-3.5-flash-20260519	OpenRouter	92.593%	Details

Sources: Artificial Analysis, Design Arena and OpenRouter. Evaluation configurations and scales differ; results are not interchangeable. Updated Oct 4, 2026.

Apps & session costs

Compare observed median session costs for applications using this model, grouped by conversation length.

30-day sample · through Sep 27, 2026

Application	Model route	Turns	Median cost / session	Details
Hermes Agent	google/gemini-3.5-flash-20260519	50+ turns	$1.847406	Details
Hermes Agent	google/gemini-3.5-flash-20260519	1 turn	$0.011372	Details
Hermes Agent	google/gemini-3.5-flash-20260519	10–49 turns	$0.470758	Details
Hermes Agent	google/gemini-3.5-flash-20260519	2–9 turns	$0.077733	Details

Source: OpenRouter, as of Oct 2, 2026. Published under CC BY 4.0. These are observed costs per session, not token prices or a forecast for your workload. Apps are compared separately.

Activity

Daily prompt and completion tokens reported for this model's routes in OpenRouter's top 50. Missing days have no published value.

Last 90 complete UTC days

Daily token usage1,573,658,998,245 reported tokens · 39 days with observations

93B0

2026-07-07
41,609,237,711 tokens

2026-07-08
57,062,382,760 tokens

2026-07-09
51,802,744,205 tokens

2026-07-10
40,216,859,236 tokens

2026-07-11
28,527,288,867 tokens

2026-07-12
27,903,997,355 tokens

2026-07-13
40,240,609,882 tokens

2026-07-14
53,896,782,070 tokens

2026-07-15
52,065,230,690 tokens

2026-07-16
57,515,608,753 tokens

2026-07-17
87,159,144,360 tokens

2026-07-18
49,151,919,427 tokens

2026-07-19
47,281,405,222 tokens

2026-07-20
64,532,271,329 tokens

2026-07-21
92,988,679,346 tokens

2026-07-22
62,149,658,424 tokens

2026-07-23
62,075,793,805 tokens

2026-07-24
50,241,395,621 tokens

2026-07-25
23,079,811,066 tokens

2026-07-26
22,083,283,152 tokens

2026-07-27
37,374,177,266 tokens

2026-07-28
34,630,437,038 tokens

2026-07-29
43,912,722,327 tokens

2026-07-30
37,756,783,782 tokens

2026-07-31
37,345,548,630 tokens

2026-08-01
20,108,024,465 tokens

2026-08-02
20,616,854,761 tokens

2026-08-03
28,449,712,471 tokens

2026-08-04
34,461,628,211 tokens

2026-08-05
29,012,022,228 tokens

2026-08-06
26,634,814,919 tokens

2026-08-07
26,606,441,121 tokens

2026-08-09
22,807,197,212 tokens

2026-08-10
26,751,296,692 tokens

2026-08-13
30,828,881,987 tokens

2026-08-14
28,281,343,660 tokens

2026-08-15
23,049,297,858 tokens

2026-08-16
24,834,434,853 tokens

2026-08-17
28,613,275,483 tokens

Jul 6, 2026Oct 3, 2026

Daily observations · 39 days

Date (UTC)	Reported tokens	Reported routes
Aug 17, 2026	28,613,275,483	1
Aug 16, 2026	24,834,434,853	1
Aug 15, 2026	23,049,297,858	1
Aug 14, 2026	28,281,343,660	1
Aug 13, 2026	30,828,881,987	1
Aug 10, 2026	26,751,296,692	1
Aug 9, 2026	22,807,197,212	1
Aug 7, 2026	26,606,441,121	1
Aug 6, 2026	26,634,814,919	1
Aug 5, 2026	29,012,022,228	1
Aug 4, 2026	34,461,628,211	1
Aug 3, 2026	28,449,712,471	1
Aug 2, 2026	20,616,854,761	1
Aug 1, 2026	20,108,024,465	1
Jul 31, 2026	37,345,548,630	1
Jul 30, 2026	37,756,783,782	1
Jul 29, 2026	43,912,722,327	1
Jul 28, 2026	34,630,437,038	1
Jul 27, 2026	37,374,177,266	1
Jul 26, 2026	22,083,283,152	1
Jul 25, 2026	23,079,811,066	1
Jul 24, 2026	50,241,395,621	1
Jul 23, 2026	62,075,793,805	1
Jul 22, 2026	62,149,658,424	1
Jul 21, 2026	92,988,679,346	1
Jul 20, 2026	64,532,271,329	1
Jul 19, 2026	47,281,405,222	1
Jul 18, 2026	49,151,919,427	1
Jul 17, 2026	87,159,144,360	1
Jul 16, 2026	57,515,608,753	1
Jul 15, 2026	52,065,230,690	1
Jul 14, 2026	53,896,782,070	1
Jul 13, 2026	40,240,609,882	1
Jul 12, 2026	27,903,997,355	1
Jul 11, 2026	28,527,288,867	1
Jul 10, 2026	40,216,859,236	1
Jul 9, 2026	51,802,744,205	1
Jul 8, 2026	57,062,382,760	1
Jul 7, 2026	41,609,237,711	1

Source: OpenRouter (openrouter.ai/rankings), as of Oct 4, 2026. CC BY 4.0. Totals include only individually published routes. Tokenizers differ by provider; the aggregated “other” category is never assigned to a model.

Technical details & API

Explore specifications, supported parameters, reasoning controls, and API identifiers for each OpenRouter route.

Current route specifications

google/gemini-3.5-flashObserved Oct 4, 2026, 11:31 AM UTC

Context: 1,048,576
Maximum output: 65,536
Tokenizer: Gemini
Input: text, image, video, file, audio
Output: text
Moderation: No
Knowledge cutoff: 2025-01-01
Added to OpenRouter: 2026-05-19

Base URLhttps://openrouter.ai/api/v1

Model IDgoogle/gemini-3.5-flash

Version IDgoogle/gemini-3.5-flash-20260519

Reasoning

Required: Yes
Enabled by default: Yes
Default effort: medium
Supported efforts: high, medium, low, minimal

Supported parameters

include_reasoning
max_tokens
reasoning
reasoning_effort
response_format
seed
stop
structured_outputs
temperature
tool_choice
tools
top_p

Frequently asked questions

Answers based on the model metadata and serving offers currently in the catalog.

How much does Gemini 3.5 Flash cost?

Listed rates start at $0.00 per million input tokens and $0.00 per million output tokens. Prices vary by provider and configuration; see Pricing for details.

Which providers offer Gemini 3.5 Flash?

There are 45 cataloged offers across 32 providers. Compare model IDs, prices and limits in Providers.

What is the context window?

The cataloged model context is 1,048,576 tokens. Each serving endpoint may apply a different limit.

Does it support tools and structured output?

Tool calling: Yes. Structured output: Yes. Support can vary by endpoint.

Catalog history · 2 recorded revisions

Metadata observations since this model was first cataloged. These are not model release versions.

Sep 14, 2026 · dfe90f945606
Sep 12, 2026 · 371463e8b722