One agent session
1M input tokens and 100K output tokens, no caching.
- Input1M x $0.25 = $0.25
- Output0.1M x $1.50 = $0.15
$0.40per session
Google - Closed weights
Gemini 3.1 Flash-Lite pricing and specs
Gemini 3.1 Flash-Lite is a closed-weights model from Google that costs $0.25 per 1M input tokens and $1.50 per 1M output tokens on the first-party API, with a 1.05M-token context window.
Last verified from ai.google.dev. All sources
- Input / 1M
- $0.25
- Output / 1M
- $1.50
- Context
- 1.05M tokens
- Weights
- Closed
Pricing per 1M tokens
| Item | Price / 1M tokens |
|---|---|
| Input | $0.25 |
| Output | $1.50 |
| Cache read | $0.025 |
| Batch inputBatch requests | $0.125 |
| Batch outputBatch requests | $0.75 |
Note: Input and cached-input prices are for text / image / video; audio input is $0.50 (cached $0.05), Batch audio input $0.25. Context caching storage is $1.00 per 1M tokens per hour (Batch $0.50) rather than a per-write fee, so cache write is not stated. Output price includes thinking tokens. Free tier available. Flex equals Batch; Priority is $0.45 input / $2.70 output / $0.045 cached. GA date from the Gemini API changelog (May 7, 2026); the earlier gemini-3.1-flash-lite-preview is shut down.
Specs
- Context window
- 1,048,576 tokens
- Max output
- 65,536 tokens
- Release date
- Provider
- API model id
gemini-3.1-flash-lite- Vercel AI Gateway id
google/gemini-3.1-flash-lite- Weights
- Closed weights
What Gemini 3.1 Flash-Lite costs in practice
Worked from the standard list rates above, with the math shown so you can swap in your own token counts.
A chat app
10,000 requests a day at 2K input and 500 output tokens each.
- Input20M x $0.25 = $5.00
- Output5M x $1.50 = $7.50
$12.50per day
$375.00 per 30-day month
The same session at a 90% cache hit
90% of the input is read from the prompt cache. The one-time cache write premium is not included.
- Cached input0.9M x $0.025 = $0.0225
- Uncached input0.1M x $0.25 = $0.025
- Output0.1M x $1.50 = $0.15
$0.1975per session
Compare with
| Model | Input / 1M | Output / 1M |
|---|---|---|
| Gemini 3.1 Flash-Lite (this page) | $0.25 | $1.50 |
| Aya Expanse 32BCohere | $0.50 | $1.50 |
| GPT-3.5 TurboOpenAI | $0.50 | $1.50 |
| Mistral Large 3Mistral AI | $0.50 | $1.50 |
| Qwen3-Coder-FlashAlibaba Cloud (Qwen) | $0.30 | $1.50 |
| Gemini 2.5 FlashGoogle | $0.30 | $2.50 |
| Gemini 3.5 Flash-LiteGoogle | $0.30 | $2.50 |
| Gemini 2.5 Flash-LiteGoogle | $0.10 | $0.40 |
| Gemini 3 Flash PreviewGoogle | $0.50 | $3 |
| Gemini 3.6 FlashGoogle | $0.75 | $3.75 |
| Gemini 3.8 FlashGoogle | $0.75 | $3.75 |
Compare
Side-by-side pages with both models' prices, specs, cost examples and like-for-like benchmark rows.
Related reading
- Do Your Agent Hooks Fail Open? Claude Code vs Codex vs Cursor vs Gemini CLIA guard hook that crashes, times out or points at a missing script lets the tool call through by default in Claude Code. v2.1.295 adds onFailure: block. Here is what each coding agent does when your policy hook breaks, with real test runs.
- EmbeddingGemma 2 Guide: Local Multimodal Embeddings for CodeEmbeddingGemma 2 is a 740M open model that embeds code, images, video and audio in one space. Specs, Matryoshka storage math, and where it breaks.
- Google AI Pro vs Gemini API: What Developers Actually GetGoogle AI Pro costs $19.99 a month and has no API key, but includes $10 of monthly Cloud credits. When the subscription wins and when to pay per token.
- How to Keep API Keys Away From Your AI Coding Agent: Claude Code vs Codex vs Cursor vs Gemini CLIA deny rule on .env stops cat but not a Python one-liner. Here are the three layers that actually keep secrets out of a coding agent's context - file rules, environment scrubbing and credential masking - and what Claude Code, Codex, Cursor and Gemini CLI give you for each, with real test runs.
- Google Gemini Agent: Coworker Agents With Their Own EmailGoogle's Gemini agent can create coworker agents with their own Workspace account, email and audit trail. What Google announced and what builders should copy.
- Gemini 4 Argon: What Developers Can Actually UseGemini 4 Argon for developers: what Google shipped, what is verified, why access starts narrow, and what to watch before planning a migration around it.
FAQ
How much does Gemini 3.1 Flash-Lite cost per million tokens?
Gemini 3.1 Flash-Lite costs $0.25 per 1M input tokens and $1.50 per 1M output tokens on Google's first-party API, per ai.google.dev on October 17, 2026. Per 1M tokens, cache reads cost $0.025, and the batch rate is $0.125 input and $0.75 output.
What is Gemini 3.1 Flash-Lite's context window?
Gemini 3.1 Flash-Lite has a 1,048,576-token context window and returns up to 65,536 output tokens per response.
Are Gemini 3.1 Flash-Lite's weights open?
No. Gemini 3.1 Flash-Lite is a closed-weights model. You call it through Google's API as gemini-3.1-flash-lite or through Vercel AI Gateway as google/gemini-3.1-flash-lite.
When was Gemini 3.1 Flash-Lite released?
Google released Gemini 3.1 Flash-Lite on May 7, 2026.
Sources
Last verified from ai.google.dev.
Newsletter
Get model price changes as they ship
One email per week. New model releases, price cuts and what they mean for your bill.