NeuroGenesysGemini 3.1 Pro (preview) API pricing
Last updated • By Will Schulz
Gemini 3.1 Pro (preview) costs $2.00 per 1M input tokens and $12.00 per 1M output tokens on Google's standard API tier, as of Nov 09, 2026. Prompts over 200K tokens are billed at $4.00 input and $18.00 output. 1,000 chatbot replies (2K tokens in, 500 out each) cost about $10.00.
How much does Gemini 3.1 Pro (preview) cost per token?
| Rate | Input | Output | Cached input |
|---|---|---|---|
| Standard | $2.00 | $12.00 | not listed |
| Prompts over 200K tokens | $4.00 | $18.00 | not listed |
Standard-tier list prices from Google's pricing page, last checked Nov 09, 2026. Batch processing and committed-use discounts can be lower; cache-write surcharges and taxes are not included.
What do common jobs cost on Gemini 3.1 Pro (preview)?
| Workload | Cost | |
|---|---|---|
| 1,000 chatbot replies2K tokens in, 500 out each | $10.00 | calculator |
| Summarize 1M tokens of documents100 documents of 10K tokens, a 500-token summary each | $2.60 | calculator |
| 1,000 RAG queries20K tokens in (half from the prompt cache), 800 out eachno cache price listed: billed at the full input rate | $49.60 | calculator |
| 100 coding-agent steps150K tokens in (90% cached), 4K out eachno cache price listed: billed at the full input rate | $34.80 | calculator |
| 1M classification calls800 tokens in, 10 out each | $1,720 | calculator |
Computed with the LLM API cost calculator's pricing rules: cached tokens at the cache-read rate where one is listed, and the long-context rate for the whole request once a prompt passes the threshold. Tokenizers differ, so the same text is a different number of tokens on each provider.
How does Gemini 3.1 Pro (preview) compare with similar-priced models?
| Model | Input / 1M | Output / 1M | 1,000 chatbot replies | vs Gemini 3.1 Pro (preview) |
|---|---|---|---|---|
| Gemini 3.8 FlashGoogle | $1.50 | $7.50 | $6.75 | 0.68× |
| Claude Sonnet 5.5Anthropic | $2.00 | $10.00 | $9.00 | 0.90× |
| GPT-6.1 SolOpenAI | $2.00 | $10.00 | $9.00 | 0.90× |
| Gemini 3.1 Pro (preview) | $2.00 | $12.00 | $10.00 | — |
| Claude Opus 5.5Anthropic | $4.00 | $20.00 | $18.00 | 1.80× |
| Gemini 4 ArgonGoogle | $4.00 | $20.00 | $18.00 | 1.80× |
Closeness and order use the list-price cost of 1,000 chatbot replies (2K tokens in, 500 out each). Compare every model on your workload.
Questions
How much does Gemini 3.1 Pro (preview) cost per 1M tokens?
$2.00 per 1M input tokens and $12.00 per 1M output tokens at Google's standard list price, as of Nov 09, 2026. Output tokens include any reasoning tokens the model generates.
How much do 1,000 chatbot replies cost with Gemini 3.1 Pro (preview)?
About $10.00 at the list price, for 1,000 replies of 2,000 input and 500 output tokens each. Longer prompts, prompt caching and reasoning tokens change this; the cost calculator handles all three.
Does Gemini 3.1 Pro (preview) have prompt caching or long-context pricing?
Our price table lists no cached-input rate for Gemini 3.1 Pro (preview), so cached tokens are priced at the full input rate here. Prompts over 200K tokens are billed at $4.00 input and $18.00 output per 1M for the whole request.
What is cheaper than Gemini 3.1 Pro (preview)?
Among the models priced closest to it, Gemini 3.8 Flash (Google, $1.50 in / $7.50 out, $6.75 per 1,000 chatbot replies) and Claude Sonnet 5.5 (Anthropic, $2.00 in / $10.00 out, $9.00 per 1,000 chatbot replies) and GPT-6.1 Sol (OpenAI, $2.00 in / $10.00 out, $9.00 per 1,000 chatbot replies) cost less. Price is not quality: compare them on your own prompts before switching.
Related tools
- Free toolLLM API cost calculatorCost per call, day and month across Claude, GPT and Gemini, with caching and long-context rates.
- Free toolToken counterCount a text's tokens and check which context windows it fits.
- GuideLLM API pricing: every modelInput and output prices for every model we track, side by side.
Sources
- Google API pricing — Google
