Gemini 3.8 Flash pricing
Gemini 3.8 Flash API cost from Google — $0.750 per 1M input tokens and $3.75 per 1M output tokens. Promotional Standard rates through Dec 31, 2026; Jan 1, 2027 input/output $1.50/$7.50. Cache storage extra. Estimate your real monthly bill below, then compare it against every other model.
Fast / cheap 1.048576M context · all prices USD per 1M tokens, this price verified 2026-10-09.
Gemini 3.8 Flash capabilities & limits
Representative specs for this tier — confirm exact limits in the Google docs.
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Call Gemini 3.8 Flash from your code
The exact model string and endpoint to use. Uses the native Gemini API format shown below.
gemini-3.8-flashhttps://generativelanguage.googleapis.com/v1betaGEMINI_API_KEYcurl "https://generativelanguage.googleapis.com/v1beta/models/gemini-3.8-flash:generateContent" \
-H "x-goog-api-key: $GEMINI_API_KEY" \
-H "content-type: application/json" \
-d '{
"contents": [{"parts": [{"text": "Hello"}]}]
}'Model strings follow each provider's naming convention; confirm the current id in the Google docs before relying on it.
What a Gemini 3.8 Flash API call actually costs
Blended input + output cost at Gemini 3.8 Flash's list rates — useful yardsticks before you commit to volume.
Gemini 3.8 Flash cost calculator
Enter your monthly volume to estimate the Gemini 3.8 Flash bill. Runs entirely in your browser.
Peak/off-peak and long-context pricing are applied automatically where published. Cache-write, Batch/Flex and Fast-mode adjustments are not included. For the multi-model breakdown with the same exclusions, use the cost calculator.
Google models — Gemini 3.8 Flash in context
How Gemini 3.8 Flash prices against its siblings. Cheapest reference cost first.
| Model | Input /1M | Output /1M | Cost / call* | Context | Type |
|---|---|---|---|---|---|
| Gemini 1.5 Flash-8B Cheapest capable model | $0.037 | $0.150 | $0.0002 | 1M | Fast / cheap |
| Gemini 2.0 Flash | $0.100 | $0.400 | $0.0005 | 1M | Fast / cheap |
| Gemini 3.1 Flash-Lite Standard text input; audio $0.50/1M. Cache storage and tools extra | $0.250 | $1.50 | $0.0018 | 1.048576M | Fast / cheap |
| Gemini 2.5 Flash | $0.300 | $2.50 | $0.0028 | 1M | Balanced |
| Gemini 3.8 Flash Promotional Standard rates through Dec 31, 2026; Jan 1, 2027 input/output $1.50/$7.50. Cache storage extra | $0.750 | $3.75 | $0.0045 | 1.048576M | Fast / cheap |
| Gemini 2.5 Pro 1M context (≤200k tier) | $1.25 | $10.00 | $0.011 | 1M | Flagship |
*Reference cost of one call with 1,000 input + 1,000 output tokens — a neutral yardstick. Use the calculator for your real usage. Cheapest row highlighted.
How Gemini 3.8 Flash pricing works
Gemini 3.8 Flash is billed per token: a lower input price of $0.750 per million tokens for everything you send, and a higher output price of $3.75 per million for everything the model generates. To turn that into a real Gemini 3.8 Flash bill, multiply by your monthly request volume and average prompt/response length — the calculator above does exactly that.
Prompt caching is the biggest lever on your Gemini 3.8 Flash cost: cached input tokens bill at just $0.075 per million — about 90% cheaper. If you reuse a long system prompt or context across calls, caching can dramatically cut the input portion of your bill.
List prices move fast — always confirm the current numbers on the official Google pricing page before relying on them for budgeting.
Gemini 3.8 Flash pricing FAQ
How much does the Gemini 3.8 Flash API cost?
Gemini 3.8 Flash costs $0.750 per 1M input tokens and $3.75 per 1M output tokens, with cached input at $0.075 per 1M (about 90% off). A typical 3K-input / 500-output call at the displayed rate works out to about $0.0041.
What is Gemini 3.8 Flash's context window?
Gemini 3.8 Flash has a 1.048576M-token context window. Standard uncached input is $0.750 per 1M tokens.
Does Gemini 3.8 Flash support prompt caching?
Yes. At Standard rates, Gemini 3.8 Flash bills cache-read tokens at $0.075 per 1M instead of $0.750 uncached — roughly 90% cheaper for the repeated part of your prompts.
Is there a cheaper alternative to Gemini 3.8 Flash?
In the same fast / cheap tier, Gemini 1.5 Flash-8B (Google) is cheaper at $0.037 in / $0.150 out. For the 1K-input / 1K-output reference workload, the lowest-cost model tracked in this catalog is Gemini 1.5 Flash-8B.