Pricingby GlyphGemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows.
Ways to buy 6
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
global-flex, cheapest · cached $0.1 | $1 | $6 | $1 / $6-50% vs list | $0.1 | -50% vs list |
flex · cached $0.1 | $1 | $6 | $1 / $6-50% vs list | $0.1 | -50% vs list |
The lab's own API · cached $0.2 | $2 | $12 | $2 / $12List price | $0.2 | List price |
global · cached $0.2 | $2 | $12 | $2 / $12Same as list | $0.2 | Same as list |
global-priority · cached $0.36 | $3.6 | $21.6 | $3.6 / $21.6+80% vs list | $0.36 | +80% vs list |
priority · cached $0.36 | $3.6 | $21.6 | $3.6 / $21.6+80% vs list | $0.36 | +80% vs list |
USD per 1M tokens; batch $1 in, $6 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $440.00 direct.
Helicone$440.00+0%
Kong AI Gateway$440.00+0%
LiteLLM$440.00+0%
Vercel AI Gateway$440.00+0%
Requesty$462.00+5%
Eden AI$464.20+5.5%
OpenRouter$464.20+5.5%
Cloudflare AI GatewayNot offeredNot offered
Neon AI GatewayNot offeredNot offered
A dash: not on that gateway's own model list. No published token fee: Martian Gateway, Portkey, TrueFoundry AI Gateway.
Related models
| In / out per 1M | Cheapest route | |||||||
|---|---|---|---|---|---|---|---|---|
Google · 131K | $1.5 | $9 | $1.5 / $9 | $3.38 | 131K | Lab list price | · | Gemini Omni 1.2 Flash is Google's native multimodal video generation and editing model, the successor to Gemini Omni 1.1 Flash. |
Google · 131K | $1.5 | $9 | $1.5 / $9 | $3.38 | 131K | Lab list price | · | Gemini Omni 1.1 Flash is Google's native multimodal video generation and editing model, the generally available successor to Gemini Omni Flash Preview. |
Google · 1MCheapest: $2 on Google Gemini API (flex) | $2 | $10 | $2 / $10 | $4 | 1M | $2 on Google Gemini API (flex) | · | Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents. |
Google · 66K | $1.5 | $7.5 | $1.5 / $7.5 | $3 | 66K | Lab list price | · | Nano Banana 2.1 (Gemini Nano Banana 2.1) is Google's image generation and editing model on the Flash tier, succeeding Nano Banana 2 and Nano Banana Pro. |
OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · | GPT-6.1 Sol is an upgrade to GPT-6 Sol from OpenAI, positioned below the flagship GPT-6 Astra in the GPT-6 series. |
Anthropic · 1M | $4 | $20 | $4 / $20 | $8 | 1M | Lab list price | · | Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. |
Anthropic · 1M | $2 | $10 | $2 / $10 | $4 | 1M | Lab list price | · | Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. |
Anthropic · 1M | $5 | $25 | $5 / $25 | $10 | 1M | Lab list price | · | Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. |
About Gemini 3.1 Pro Preview
Takes audio, files, image, text, video in and returns text. First listed Mar 3, 2026. Up to 66K output tokens. Blended price $4.5 per 1M tokens at 3 input to 1 output. Overall score 10 on leadersboard.fru.dev (rank 18). Model id gemini-3-1-pro-preview.
Price history
List price since Mar 3, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
Questions
How much does Gemini 3.1 Pro Preview cost?
$2 per million input tokens and $12 per million output tokens, with cached input at $0.2, or $1 and $6 through the Batch API.
What is the context window of Gemini 3.1 Pro Preview?
1M tokens, with up to 66K tokens of output.
Where is Gemini 3.1 Pro Preview cheapest?
Of 6 routes tracked, Google Vertex AI is cheapest at $1 input and $6 output per million tokens.