How much does Gemini 3.5 Flash cost?

Gemini 3.5 Flash costs $1.50/M input tokens and $9.00/M output tokens, with separate rates for Cache Read at $0.15/M tokens, Cache Write at $0.08333/M tokens, Image Input at $1.50/M tokens, Input Audio at $3.00/M tokens, Input Audio Cache at $0.30/M tokens, and Web Search at $14.00/1K calls.

What is the context length of Gemini 3.5 Flash?

Gemini 3.5 Flash has a 1,048,576 token context window. It supports up to 65,536 completion tokens.

Does Gemini 3.5 Flash support tool calling and structured outputs?

Yes. Gemini 3.5 Flash accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

What inputs and outputs does Gemini 3.5 Flash support?

Gemini 3.5 Flash accepts text, images, video, files such as PDFs, and audio as input and returns text.

Which providers serve Gemini 3.5 Flash?

Gemini 3.5 Flash is served by 2 providers on OpenRouter: Google Vertex and Google AI Studio. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

When was Gemini 3.5 Flash released?

Gemini 3.5 Flash was released on May 19, 2026. Its knowledge cutoff is January 1, 2025.

Google: Gemini 3.5 Flash

google/gemini-3.5-flash

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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.

Modalities

In / out price

$1.50 / $9per 1M

Context

1.0M

Released

May 19, 2026

Knowledge cutoff

Jan 2025

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick: Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Latency / throughput


	$1.50	$9.00	$0.15	$0.30	1.53s	156 tok/s	100.00%
	$1.50	$9.00	$0.15	$0.30	1.86s	124 tok/s	99.87%
Not used in Standard routing:Why these endpoints are not used
Flex	$0.75	$4.50	$0.075	$0.15	13.07s	6 tok/s	24.24%
Flex	$0.75	$4.50	$0.075	$0.15	1.60s	154 tok/s	100.00%
	$1.65	$9.90	$0.165	$0.33	1.66s	122 tok/s	100.00%
Priority	$2.70	$16.20	$0.27	$0.54	0.85s	113 tok/s	100.00%
Priority	$2.70	$16.20	$0.27	$0.54	--	--	100.00%

Input $1.50Output $9.00
156 tok/s100.00% uptime
Input $1.50Output $9.00
124 tok/s99.87% uptime
Not used in Standard routing:Why these endpoints are not used
Input $0.75Output $4.50
Flex
6 tok/s24.24% uptime
Input $0.75Output $4.50
Flex
154 tok/s100.00% uptime
Input $1.65Output $9.90
122 tok/s100.00% uptime
Input $2.70Output $16.20
Priority
113 tok/s100.00% uptime
Input $2.70Output $16.20
Priority
-- tok/s100.00% uptime

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Weighted average

Input

$1.116/M tokens

Output

$9.01/M tokens

Gemini 3.5 Flash — Price history

Price history

No effective price data for this selection

		$0.884	$9.00	47.4%	43.5%
		$1.280	$9.00	16.4%	55.7%
Not used in Standard routing:Why these endpoints are not used
	Flex	$0.543	$4.50	30.7%	0.4%
	Flex	$0.592	$4.50	23.4%	0.1%
		$1.193	$9.90	31.2%	0.0%
	Priority	$1.997	$16.20	28.9%	0.0%
	Priority	$2.024	$16.20	27.8%	0.2%

Effective in $0.884Effective out $9.00
Token share
43.5%
Effective in $1.280Effective out $9.00
Token share
55.7%
Not used in Standard routing:Why these endpoints are not used
Effective in $0.543Effective out $4.50
FlexToken share
0.4%
Effective in $0.592Effective out $4.50
FlexToken share
0.1%
Effective in $1.193Effective out $9.90
Token share
0.0%
Effective in $1.997Effective out $16.20
PriorityToken share
0.0%
Effective in $2.024Effective out $16.20
PriorityToken share
0.2%

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Uptime (3d)

99.99%

Availability (3d)

99.72%

Availability over the last 3 days

Last 72 hours

Availability 99.72%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

99.70%

Without Routing

98.79%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for Google: Gemini 3.5 Flash (Artificial Analysis, Design Arena and Vals AI)
Source	Benchmark	Score
Artificial Analysis	Gemini 3.5 Flash (High) Coding Index	70.1
Artificial Analysis	Gemini 3.5 Flash (High) Agentic Index	26.0
Artificial Analysis	Gemini 3.5 Flash (High) GPQA Diamond	92.2%
Artificial Analysis	Gemini 3.5 Flash (High) HLE	42.7%
Artificial Analysis	Gemini 3.5 Flash (High) IFBench	76.3%
Artificial Analysis	Gemini 3.5 Flash (High) τ²-Bench Telecom	95.3%
Artificial Analysis	Gemini 3.5 Flash (High) AA-LCR	73.3%
Artificial Analysis	Gemini 3.5 Flash (High) τ-Bench Banking	32.2%
Artificial Analysis	Gemini 3.5 Flash (High) GDPval-AA	35.5%
Artificial Analysis	Gemini 3.5 Flash (High) CritPt	13.1%
Artificial Analysis	Gemini 3.5 Flash (High) SciCode	53.9%
Artificial Analysis	Gemini 3.5 Flash (High) Terminal-Bench Hard	40.9%
Artificial Analysis	Gemini 3.5 Flash (High) Terminal-Bench 4.0	6.6%
Artificial Analysis	Gemini 3.5 Flash (High) Terminal-Bench 2.1	78.7%
Artificial Analysis	Gemini 3.5 Flash (Medium) GPQA Diamond	92.1%
Artificial Analysis	Gemini 3.5 Flash (Medium) HLE	41.3%
Artificial Analysis	Gemini 3.5 Flash (Medium) IFBench	74.6%
Artificial Analysis	Gemini 3.5 Flash (Medium) τ²-Bench Telecom	95.6%
Artificial Analysis	Gemini 3.5 Flash (Medium) AA-LCR	74.3%
Artificial Analysis	Gemini 3.5 Flash (Medium) CritPt	10.9%
Artificial Analysis	Gemini 3.5 Flash (Medium) Terminal-Bench Hard	39.4%
Artificial Analysis	Gemini 3.5 Flash (Minimal) GPQA Diamond	82.8%
Artificial Analysis	Gemini 3.5 Flash (Minimal) HLE	24.1%
Artificial Analysis	Gemini 3.5 Flash (Minimal) IFBench	47.3%
Artificial Analysis	Gemini 3.5 Flash (Minimal) τ²-Bench Telecom	58.8%
Artificial Analysis	Gemini 3.5 Flash (Minimal) AA-LCR	61.3%
Artificial Analysis	Gemini 3.5 Flash (Minimal) CritPt	1.4%
Artificial Analysis	Gemini 3.5 Flash (Minimal) Terminal-Bench Hard	46.2%
Design Arena	Gemini 3.5 Flash Agents Arena Agenticgamedev Elo	1124
Design Arena	Gemini 3.5 Flash Agents Arena Agentichtmlslides Elo	1162
Design Arena	Gemini 3.5 Flash Agents Arena Agenticslides Elo	1244
Design Arena	Gemini 3.5 Flash Agents Arena Agenticslides(Html) Elo	1162
Design Arena	Gemini 3.5 Flash Agents Arena Agenticslides(Python-Pptx) Elo	1242
Design Arena	Gemini 3.5 Flash Agents Arena Androidnative Elo	1175
Design Arena	Gemini 3.5 Flash Agents Arena Blender3d Elo	935
Design Arena	Gemini 3.5 Flash Agents Arena Codetovideo Elo	1147
Design Arena	Gemini 3.5 Flash Agents Arena Full Stack Elo	1169
Design Arena	Gemini 3.5 Flash Agents Arena Godotgamedev Elo	1078
Design Arena	Gemini 3.5 Flash Agents Arena Htmlslides Elo	1038
Design Arena	Gemini 3.5 Flash Agents Arena Mobile Apps Elo	1169
Design Arena	Gemini 3.5 Flash Agents Arena Pdf Elo	1143
Design Arena	Gemini 3.5 Flash Agents Arena Pptxslides Elo	1244
Design Arena	Gemini 3.5 Flash Agents Arena Python-Pptxslides Elo	1247
Design Arena	Gemini 3.5 Flash Agents Arena Python-Pptxslides Elo	1147
Design Arena	Gemini 3.5 Flash Agents Arena Spreadsheet Elo	978
Design Arena	Gemini 3.5 Flash Agents Arena Webapps Elo	1177
Design Arena	Gemini 3.5 Flash Models Arena 3D Elo	1225
Design Arena	Gemini 3.5 Flash Models Arena Asciiart Elo	1248
Design Arena	Gemini 3.5 Flash Models Arena Code Categories Elo	1256
Design Arena	Gemini 3.5 Flash Models Arena Data Visualization Elo	1237
Design Arena	Gemini 3.5 Flash Models Arena Game Development Elo	1253
Design Arena	Gemini 3.5 Flash Models Arena SVG Elo	1245
Design Arena	Gemini 3.5 Flash Models Arena UI Component Elo	1266
Design Arena	Gemini 3.5 Flash Models Arena Website Elo	1260
Vals AI	Gemini 3.5 Flash Code Migration	26.7%
Vals AI	Gemini 3.5 Flash CorpFin v2	64.7%
Vals AI	Gemini 3.5 Flash EMB	63.5%
Vals AI	Gemini 3.5 Flash Finance Agent (v2)	57.9%
Vals AI	Gemini 3.5 Flash Financial Coaching Bench	63.0%
Vals AI	Gemini 3.5 Flash GPQA Diamond	92.7%
Vals AI	Gemini 3.5 Flash Harvey's Legal Agent Benchmark v1	2.5%
Vals AI	Gemini 3.5 Flash LiveCodeBench	87.6%
Vals AI	Gemini 3.5 Flash LegalBench	83.6%
Vals AI	Gemini 3.5 Flash Legal Research Bench	30.8%
Vals AI	Gemini 3.5 Flash MedCode	55.8%
Vals AI	Gemini 3.5 Flash MedScribe	76.6%
Vals AI	Gemini 3.5 Flash MMLU Pro	89.5%
Vals AI	Gemini 3.5 Flash MMMU Pro	88.3%
Vals AI	Gemini 3.5 Flash MortgageTax	68.1%
Vals AI	Gemini 3.5 Flash ProgramBench	0.0%
Vals AI	Gemini 3.5 Flash ProofBench v1.1	31.0%
Vals AI	Gemini 3.5 Flash Public Benefits Bench v1.1	59.5%
Vals AI	Gemini 3.5 Flash SAGE v1	49.9%
Vals AI	Gemini 3.5 Flash SkillsBench	52.7%
Vals AI	Gemini 3.5 Flash SWE-bench	78.8%
Vals AI	Gemini 3.5 Flash Tax Agent Bench	21.7%
Vals AI	Gemini 3.5 Flash TaxEval v2	74.4%
Vals AI	Gemini 3.5 Flash Terminal-Bench 4.0	6.1%
Vals AI	Gemini 3.5 Flash Terminal-Bench-Science	5.7%
Vals AI	Gemini 3.5 Flash Vals Index	44.8%
Vals AI	Gemini 3.5 Flash Vals Multimodal Index	62.9%
Vals AI	Gemini 3.5 Flash Vibe Code Bench v1.1	48.7%
Vals AI	Gemini 3.5 Flash Vals Web Search Index	37.0%

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Hello Haven

new

20.3Btokens

OpenClaw

OpenClaw is an open-source AI agent that connects to your messaging apps and takes real actions on your behalf, from running commands and browsing the web to managing files and sending emails.

6.94Btokens

Hermes Agent

Hermes Agent is an open-source, self-improving AI agent by Nous Research that runs persistently with memory across sessions, and builds reusable skills from experience. It comes with 40+ built-in tools, including web search, browser automation, and vision, plus scheduled automations and subagents.

5.37Btokens

mall-cus-service

new

4.59Btokens

rook-model-router

new

4.06Btokens

Rest of OpenRouter

5.35B

Top 5 Apps

261M

Google: Gemini Flash versions

Not currently available through EU in-region routing. In-region routing docs

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Gemini Omni 1.2 Flash

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Note: video generation is only supported through the Video Generation API. See the guide: https://openrouter.ai/docs/guides/overview/multimodal/video-generation

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Gemini 4 Argon

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Nano Banana 2.1

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Gemini 3.6 Flash

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Gemini 3.5 Flash Lite

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Google: Gemini 3.5 Flash

Providers