How much does Gemini 3.8 Flash cost per month?

For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, Gemini 3.8 Flash costs about $787.50 per month at the provider's official prices (verified) ($0.75 per 1M input tokens, $3.75 per 1M output tokens).

Does Gemini 3.8 Flash support prompt caching?

Yes. Cached input costs $0.075 per 1M tokens, compared with $0.75 for regular input.

How long is Gemini 3.8 Flash's context window?

Gemini 3.8 Flash accepts up to 1,048,576 tokens (1.05M) of context and returns up to 65,536 tokens per response.

Does Gemini 3.8 Flash have a batch price?

Yes. Asynchronous batch requests cost $0.375 per 1M input tokens and $1.875 per 1M output tokens.

Gemini 3.8 Flash API Pricing

Google · released Sep 2, 2026 · 1.05M context · API model ID gemini-3.8-flash

Gemini 3.8 Flash by Google API pricing: $0.75 per 1M input tokens and $3.75 per 1M output tokens (verified against the official pricing page, Oct 9, 2026).

Prices

Gemini 3.8 Flash prices, USD per 1M tokens
Price	USD per 1M tokens
Input	$0.75
Output	$3.75
Cache read	$0.075
Cache write	Not published
Batch input	$0.375
Batch output	$1.875
Audio input	$0.75

Verified against the provider's official pricing page on Oct 9, 2026. Official pricing page Long-context and separately billed token prices, where shown, are list prices compiled by models.dev (checked Oct 10, 2026, 09:00 UTC).

Estimated monthly cost

$787.50

per month

per day: $26.25
per request: $0.00263

Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.

Compare this workload across models

Monthly cost by workload

Workload	Per month
Chatbot1,000 in / 500 out tokens, 10,000 requests a day	$787.50/mo
RAG8,000 in / 500 out tokens, 5,000 requests a day	$1,181/mo
Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input	$540.00/mo

Context and capabilities

Context: 1,048,576 tokens
Max output: 65,536 tokens
Input: text, image, video, audio, pdf
Output: text
Knowledge cutoff: Not published
Open weights: No
Tool calling: Yes
Reasoning: Yes
Structured outputs: Yes

Capabilities and limits as listed by models.dev.

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Price history

No price changes since we started tracking on Oct 8, 2026.

Questions

How much does Gemini 3.8 Flash cost per month?: For a chatbot handling 10,000 requests a day with 1,000 input and 500 output tokens each, Gemini 3.8 Flash costs about $787.50 per month at the provider's official prices (verified) ($0.75 per 1M input tokens, $3.75 per 1M output tokens).
Does Gemini 3.8 Flash support prompt caching?: Yes. Cached input costs $0.075 per 1M tokens, compared with $0.75 for regular input.
How long is Gemini 3.8 Flash's context window?: Gemini 3.8 Flash accepts up to 1,048,576 tokens (1.05M) of context and returns up to 65,536 tokens per response.
Does Gemini 3.8 Flash have a batch price?: Yes. Asynchronous batch requests cost $0.375 per 1M input tokens and $1.875 per 1M output tokens.