Gemini 3.5 Flash

Gemini 3.5 Flash is a Flash-tier multimodal model from Google, launched as its workhorse for agentic and coding tasks and now positioned for high-throughput work.

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input · usd / 1m tok

$1.50

output · usd / 1m tok

$9.00

context window

1mtokens

modalities · in → out

pricing

base api ratesusd per 1m tokens

input: $1.50
output: $9.00
cache read: $0.15

providers

Google hosts Gemini 3.5 Flash. Impossibl routes your request intelligently and handles failover automatically when a provider is down.

Google

specifications

takes text, image, audio and video in, gives text outgoogle/gemini-3.5-flash

creatorGoogle
model typeText generation
context window1,000,000 tokens
maximum outputnot published
input
takes text, image, audio and video in, gives text out
outputtext
tool callingnot verified
releasedmay 19, 2026
endpoint/v1/chat/completions

unknown means the public catalog does not establish that fact. a model's documented capabilities can differ from what a particular api supports. see the model documentation for integration details.

try it · your prompt, this model, live

# responses API
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["IMPOSSIBL_API_KEY"],
    base_url="https://api.impossibl.com/v1",
)

resp = client.responses.create(
    model="google/gemini-3.5-flash",
    input="▌",
)
print(resp.output_text)

edit the prompt, then run

# responses API
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["IMPOSSIBL_API_KEY"],
    base_url="https://api.impossibl.com/v1",
)

resp = client.responses.create(
    model="google/gemini-3.5-flash",
    input="▌",
)
print(resp.output_text)

edit the prompt, then run

benchmarks

intelligence index

32.6#48 of 113 models on the gateway

coding index70.1#23 of 66
agentic index26.0#30 of 54
omniscience21.2#16 of 90
gpqa92.2%#14 of 82
humanity’s last exam42.7%#20 of 93

Tau295.3%
GPQA92.2%
MMMU-Pro84.3%
IFBench76.3%
AA-LCR73.3%
SciCode53.9%
APEX-Agents47.1%
AnalystAgent45.0%
Humanity’s Last Exam42.7%
AutomationBench Partial42.1%
Terminal-Bench Hard40.9%
ITBench40.3%
Tau Banking32.2%
GDP.pdf All-pass19.8%
CritPt13.1%
Multilingual LCR10.0%

Intelligence Index32.60
Omniscience Index21.18
GDPval Elo1200.77
legal index (API)44.3
coding index (API)70.1
agentic index (API)26
economics index (API)45.6
engineering index (API)34.7
intelligence index (API)32.6
strategy and ops index (API)37.4
finance and accounting index (API)38.5
healthcare and medical index (API)33.2

view source ↗all source data and breakdowns (json) ↗

each configuration is listed separately; these evaluations describe the tested model configuration, and performance and costs can differ on impossibl. unmeasured scores are omitted and api values keep their source units. last checked 2026-10-22.

compare Gemini 3.5 Flash with other models

frontier labs and open weights, best-ranked firstusd / 1m tok · in / out

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moonshotai/kimi-k3.1-pro$2.00 / $10.00compare →
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impossibl models --all →

frequently asked questions

What is Gemini 3.5 Flash?

Gemini 3.5 Flash is a Flash-tier multimodal model from Google, launched as its workhorse for agentic and coding tasks and now positioned for high-throughput work. It brought near-Pro coding and reasoning to the Flash tier and is optimized for coding proficiency and parallel agentic execution.

How much does Gemini 3.5 Flash cost?

Gemini 3.5 Flash costs $1.50 per million input tokens and $9.00 per million output tokens through the Impossibl API. Cache reads cost $0.15 per million tokens. All rates are in USD.

view the pricing table ↑

What is the context length of Gemini 3.5 Flash?

Gemini 3.5 Flash has a 1,000,000-token context window through the Impossibl API.

What inputs and outputs does Gemini 3.5 Flash support?

Gemini 3.5 Flash accepts text, image, audio, and video as input. Gemini 3.5 Flash returns text.

How do I use Gemini 3.5 Flash through an API?

Gemini 3.5 Flash is available through the Impossibl API. Use google/gemini-3.5-flash as the model identifier with /v1/chat/completions. The quickstart explains how to create an API key and send your first request.

follow the api quickstart →

When was Gemini 3.5 Flash released?

Google released Gemini 3.5 Flash on May 19, 2026.

Creator release announcement ↗

this page describes Gemini 3.5 Flash as listed by the impossibl public api. prices and availability come from that catalog, refreshed here every five minutes. this is an impossibl offering, not a comparison of independent hosting-provider quotes. model descriptions and release dates, where available, use the creator sources linked under the answers above.

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