How much does Gemini 3.8 Flash cost?

On the OpenRouter route, Gemini 3.8 Flash costs $0.825 per 1 million input tokens and $4.13 per 1 million output tokens, in US dollars. Input tokens that Gemini 3.8 Flash reads from the prompt cache cost $0.0825 per 1 million tokens. LLMCompare verified this price on 21 Oct 2026.

What is the context length of Gemini 3.8 Flash?

Gemini 3.8 Flash has a context length of 1,048,576 tokens and returns up to 65,536 output tokens in one call.

What inputs does Gemini 3.8 Flash accept?

Gemini 3.8 Flash accepts these inputs: Text, Image, File, Audio, Video. Gemini 3.8 Flash returns: Text.

Which reasoning effort levels does Gemini 3.8 Flash support?

Gemini 3.8 Flash supports these reasoning effort levels: high, medium, low. Reasoning is always on for Gemini 3.8 Flash and cannot be turned off.

Can I test Gemini 3.8 Flash on my own data?

Not yet. LLMCompare lists the prices and parameters of Gemini 3.8 Flash, but no route to Gemini 3.8 Flash is configured on LLMCompare, so it cannot be selected for an evaluation.

Gemini 3.8 Flash

by Googlegoogle/gemini-3.8-flash

Text
No route yet
Released 2 Sep 2026

LLMCompare cannot run Gemini 3.8 Flash yet.No route to this model is configured on this site yet. Its prices and parameters are listed below for reference.

See the models that can be run now

Gemini 3.8 Flash at a glance

Context length: 1,048,576 tokens
Maximum output: 65,536 tokens
Accepts: Text, Image, File, Audio, Video
Returns: Text
Features: ReasoningJSON outputTool callingPrompt cachingImage input
Reasoning effort levels: highmediumlowReasoning is always on for this model.
Released: 2 Sep 2026
Knowledge cutoff: Not published

Model facts synced from the OpenRouter model list on 21 Oct 2026.

Gemini 3.8 Flash pricing by route

A route is the service LLMCompare calls to reach the model. Gemini 3.8 Flash has 1 route. Prices are in US dollars.

Prices of Gemini 3.8 Flash on each route
Route	On LLMCompare	Inputper 1M tokens	Outputper 1M tokens	Cache readper 1M tokens	Cache writeper 1M tokens	Price verified on	Source
OpenRouterDefault	Not configured	$0.825	$4.13	$0.0825	$0.0417	21 Oct 2026	openrouter.ai/google/gemini-3.8-flash

The cost shown in an LLMCompare report is calculated from these prices as they were at the time of the run.

Cost calculator

Estimate what a batch of calls to Gemini 3.8 Flash costs. The starting numbers are examples. Change them to match your task.

Input tokens per call

Input tokens read from cache

Part of the input tokens above, billed at the cache read price.

Output tokens per call

Reasoning tokens per call

Billed in addition to the output tokens.

Number of calls

Cost per call: $0.0029; 4 credits
Cost of 100 calls: $0.2888; 400 credits

Calculated from the OpenRouter prices verified on 21 Oct 2026. Credits are the cost plus a 20% service fee, at $0.001 per credit, rounded up for each call, with a minimum of 1 per call. A real run is charged for the usage the provider reports.

Parameters you can set

These are the parameters LLMCompare can set when it calls the model through OpenRouter.

Parameters of Gemini 3.8 Flash
Parameter	Type	Range or options	Default
`temperature`	Number	0 to 2in steps of 0.1	Provider default
`top_p`	Number	0 to 1in steps of 0.05	Provider default
`max_tokens`	Integer	1 to 65,536	Provider default
`reasoning_effort`	One of	`highmediumlow`	`medium`
`seed`	Integer	-2,147,483,648 to 4,294,967,295	Provider default
`response_format`	One of	`textjson_object`	Provider default

About Gemini 3.8 Flash

Gemini 3.8 Flash is Google's most intelligent Flash model with significant gains from 3.7 Flash across software engineering, agentic tasks, and multi-step reasoning.

Description as published for this model. LLMCompare has not edited it.

Models to compare with Gemini 3.8 Flash

Text models from the same provider and models at the nearest price. The order is not a ranking.

Models to compare with Gemini 3.8 Flash
Model	Context	Max output	Input priceper 1M tokens	Output priceper 1M tokens	Features	Released	On LLMCompare
Gemini 3.7 FlashGoogle`google/gemini-3.7-flash`	1.05M	65.5k	$0.75	$3.75	ReasoningJSONToolsCacheVision	13 Aug 2026	Runnable now
Gemini 3.6 FlashGoogle`google/gemini-3.6-flash`	1.05M	65.5k	$0.75	$3.75	ReasoningJSONToolsCacheVision	21 Jul 2026	No route yet
Gemini 3 Flash PreviewGoogle`google/gemini-3-flash-preview`	1.05M	65.5k	$0.50	$3.00	ReasoningJSONToolsCacheVision	17 Dec 2025	No route yet
Sakana NamazuSakana`sakana/sakana-namazu`	262k	65.5k	$0.95	$4.00	ReasoningJSONToolsCacheVision	11 Aug 2026	No route yet
InklingThinking Machines`thinkingmachines/inkling`	524k	472k	$1.00	$4.05	ReasoningToolsCacheVision	17 Jul 2026	No route yet
GLM 5V TurboZ.ai`z-ai/glm-5v-turbo`	203k	131k	$1.20	$4.00	JSONToolsCacheVision	1 Apr 2026	No route yet

Questions about Gemini 3.8 Flash

How much does Gemini 3.8 Flash cost?: On the OpenRouter route, Gemini 3.8 Flash costs $0.825 per 1 million input tokens and $4.13 per 1 million output tokens, in US dollars. Input tokens that Gemini 3.8 Flash reads from the prompt cache cost $0.0825 per 1 million tokens. LLMCompare verified this price on 21 Oct 2026.
What is the context length of Gemini 3.8 Flash?: Gemini 3.8 Flash has a context length of 1,048,576 tokens and returns up to 65,536 output tokens in one call.
What inputs does Gemini 3.8 Flash accept?: Gemini 3.8 Flash accepts these inputs: Text, Image, File, Audio, Video. Gemini 3.8 Flash returns: Text.
Which reasoning effort levels does Gemini 3.8 Flash support?: Gemini 3.8 Flash supports these reasoning effort levels: high, medium, low. Reasoning is always on for Gemini 3.8 Flash and cannot be turned off.
Can I test Gemini 3.8 Flash on my own data?: Not yet. LLMCompare lists the prices and parameters of Gemini 3.8 Flash, but no route to Gemini 3.8 Flash is configured on LLMCompare, so it cannot be selected for an evaluation.