Gemini 3.1 Pro Preview vs Gemini 3.6 Flash
Pick up to 3 models · pricing, context and capabilities · simulate your product cost
Data updated on September 30, 2026· 217 models
Gemini 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.
- Reasoning estimated
- ▲
- Speed estimated
- Input
- Output
- Context
- 1 M tokens
- Max output
- 66 K
- Input, $ per 1M tokens
- $2.00
- Output, $ per 1M tokens
- $12.00
- Cache read, $ per 1M
- $0.200
- Batch (input / output)
- $1.00 / $6.00
- Tool calling
- Yes
- Released
- 02/19/2026
- Knowledge cutoff
- 2025-01
- API id
- google/gemini-3.1-pro-preview
Gemini 3.6 Flash is a high-efficiency model from Google for coding, agentic workflows, and web and app development.
- Reasoning estimated
- Speed estimated
- Input
- Output
- Context
- 1 M tokens
- Max output
- 66 K
- Input, $ per 1M tokens
- ▲$0.750
- Output, $ per 1M tokens
- ▲$3.75
- Cache read, $ per 1M
- $0.075
- Batch (input / output)
- $0.375 / $1.88
- Tool calling
- Yes
- Released
- ▲07/21/2026
- Knowledge cutoff
- 2026-03
- API id
- google/gemini-3.6-flash
Which is the better API choice: Gemini 3.1 Pro Preview vs Gemini 3.6 Flash?
- Gemini 3.6 Flash: cheapest input (63% less than Gemini 3.1 Pro Preview)
- Gemini 3.6 Flash: cheapest output
- Gemini 3.6 Flash: the newest (07/21/2026)
- Gemini 3.1 Pro Preview: most reasoning (estimated)
Gemini 3.6 Flash costs 63% less on input and 69% less on output than Gemini 3.1 Pro Preview ($0.750 / $3.75 versus $2.00 / $12.00 per million tokens). All accept 1 M tokens of context. Gemini 3.1 Pro Preview and Gemini 3.6 Flash offer a batch tier at half price for jobs that do not need an immediate answer.
What would your product cost?
Estimate the monthly cost with your app's real volume. List prices, no cache or batch discounts.
With Gemini 3.6 Flash you save $51.75 a month versus Gemini 3.1 Pro Preview (66% less).
The 6 cheapest for this scenario (chat, last 12 months)
- 1Lyria 3 Pro Preview Google$0.00
- 2Lyria 3 Clip Preview Google$0.00
- 3Qwen3.7 Flash Qwen$0.97
- 4DeepSeek V4 Flash 0731 DeepSeek$1.55
- 5Ministral 3 3B 2512 Mistral$1.90
- 6Qwen3.5-Flash Qwen$2.02
Paste your prompt: tokens and cost per model
Rough estimate (about 4 characters per token). Nothing is sent to any server.
Cost of sending it 1,000 times (input only)
- 1Gemini 3.6 Flash Google$0.057
- 2Gemini 3.1 Pro Preview Google$0.152
- 3Claude Sonnet 5.5 Anthropic$0.152
- 4Claude Sonnet 5 Anthropic$0.152
- 5Claude Opus 5.5 Anthropic$0.304
- 6Claude Opus 5 Anthropic$0.380
- 7Claude Fable 5.1 Anthropic$0.760
- 8Claude Fable 5 Anthropic$0.760
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- Gemini 3.8 Flash vs DeepSeek V4.1 Flash
- Gemini 3.8 Flash vs Grok 4.7
- DeepSeek V4.1 Flash vs Grok 4.7
Frequently asked questions
Which is the better API choice: Gemini 3.1 Pro Preview vs Gemini 3.6 Flash?
Gemini 3.6 Flash costs 63% less on input and 69% less on output than Gemini 3.1 Pro Preview ($0.750 / $3.75 versus $2.00 / $12.00 per million tokens). All accept 1 M tokens of context. Gemini 3.1 Pro Preview and Gemini 3.6 Flash offer a batch tier at half price for jobs that do not need an immediate answer.
Which is cheaper: Gemini 3.1 Pro Preview and Gemini 3.6 Flash?
Gemini 3.6 Flash is cheaper: $0.750 per million input tokens and $3.75 per million output tokens, versus $2.00 / $12.00 for Gemini 3.1 Pro Preview.
Which has more context: Gemini 3.1 Pro Preview and Gemini 3.6 Flash?
Gemini 3.1 Pro Preview and Gemini 3.6 Flash accept the same context: 1 M tokens.
Which is newer: Gemini 3.1 Pro Preview and Gemini 3.6 Flash?
Gemini 3.6 Flash was released on 07/21/2026; Gemini 3.1 Pro Preview on 02/19/2026.
What would 10,000 requests a month cost with Gemini 3.1 Pro Preview and Gemini 3.6 Flash?
With 1,500 input and 400 output tokens per request: Gemini 3.1 Pro Preview: $78.00; Gemini 3.6 Flash: $26.25 a month, at list price.
Where do the prices come from and how often are they updated?
From the public catalogs of OpenRouter, models.dev and LiteLLM, which publish each provider's list prices. They sync once a day and the last update date is shown above the comparison.
What does price per million tokens mean?
It is what the provider charges per million tokens you send (input) or the model generates (output). A token is roughly 4 characters. Output almost always costs more than input.
Sources: OpenRouter, models.dev and LiteLLM. Prices in USD per million tokens, list price, no volume discounts. Prompt tokens are an estimate; each provider's tokenizer may differ.