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Google: Gemini 3.5 Flash

google/gemini-3.5-flash

Gemini 3.5 Flash is Google’s proprietary AI model, released May 19, 2026. It costs $1.50/M input and $9/M output tokens, and handles a 1M-token context window. Its strongest use case is agentic & tools, where it ranks in the 92nd percentile of the models Model Beat tracks.

Gemini 3.5 Flash is Google's high-efficiency multimodal model, bringing near-Pro level coding and reasoning at Flash-tier cost and speed.

Context
1M
Input
$1.50 / 1M
Output
$9 / 1M
Released
May 19, 2026
Modalities
textimagevideofileaudiotext
Strongest atAgentic & Tools top 8%Coding top 16%Reasoning & Knowledge top 17%

Benchmarks

Scores on standardized evaluations. Higher is better — and rank shows where Gemini 3.5 Flash lands among all models tracked on Model Beat.

83.0
Intelligence Index
Epoch AI
83rd percentile of tracked models
84.0
Coding Index
Epoch AI
84th percentile of tracked models
92.0
Agentic Index
Epoch AI
92nd percentile of tracked models

Reasoning

7 evals
ARC-AGI92.5%

Abstract visual reasoning

ARC-AGI-272.1%

Harder abstract reasoning

GPQA Diamond92.8%

Graduate-level scientific reasoning

Humanity's Last Exam41.0%

Frontier of human expert knowledge

SimpleBench76.7%

Common-sense trick questions

SimpleQA Verified68.4%

Factual accuracy & hallucination

WeirdML62.6%

Novel ML problem-solving

Coding

3 evals
SciCode53.1%

Scientific research coding

SWE-bench Verified79.3%

Real GitHub issue resolution

WebDev Arena1506

Human-rated web development

Math

3 evals
AIME 2024/202595.6%

Olympiad-qualifier math

FrontierMath39.0%

Research-level math problems

FrontierMath Tier 414.6%

Hardest research math

Agentic & Tools

2 evals
APEX49.6%

Multi-step agentic tasks

τ²-bench95.3%

Tool-agent-user reliability

In the news

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Frequently asked questions

What is 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.

Who created Gemini 3.5 Flash?

Gemini 3.5 Flash is an AI model developed by Google, part of the Gemini family, released May 19, 2026.

How much does Gemini 3.5 Flash cost?

Gemini 3.5 Flash's list price from Google is $1.50 per million input tokens and $9 per million output tokens.

What is Gemini 3.5 Flash's context window?

Gemini 3.5 Flash supports a context window of up to 1M tokens.

How does Gemini 3.5 Flash perform on benchmarks?

On standardized evaluations tracked by Epoch AI, Gemini 3.5 Flash scores 49.6% on APEX, 68.4% on SimpleQA Verified, 76.7% on SimpleBench.

Is Gemini 3.5 Flash open source?

Gemini 3.5 Flash is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.

Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Jul 30, 2026.