AI Index

Gemini 3.1 Pro previewvsKimi K3

Both language models, compared at each maker’s own API list prices. Every figure links to its source.

Compare at your usage

Every model priced for the same request
Prompt per request
Cache hits
Batch
Service tier

8,000 tokens in, 2,000 out

Gemini 3.1 Pro preview on Gemini APIKimi K3 on Moonshot AI Platform
Rate appliedBase rateBase rate
Inputper 1M tokens$2.00 $3.00
Cache readper 1M tokens$0.20 $0.30
Outputper 1M tokens$12.00 $15.00
Cost per request$0.040$0.054
Per 1,000 requests$40.00$54.00

Every model is priced for the same request at its maker’s own list prices (each with its source and date), so bold marks the cheapest. A model that can’t serve the request is named, not ranked; a condition its seller doesn’t price says which rate was used.

Cost per request as prompts grow

2K tokens out, list price on each maker’s API. Gemini 3.1 Pro preview charges $4.00 / $18.00 above 200K tokens.

0$1.00$2.00$3.00$4.000250K500K750K1Mprompt tokens per request200K8KGemini 3.1 Pro preview$0.040 at 8KKimi K3$0.054 at 8K
  • Gemini 3.1 Pro preview · Gemini API
  • Kimi K3 · Moonshot AI Platform

Where each stands among all scored models

Each line runs from the lowest to the highest score on the board; the tick is the median.

Epoch Capabilities Index#35 vs #21 of 118Kimi K3: 158.5Gemini 3.1 Pro preview: 156.2LMArena Text#16 vs #15 of 163Kimi K3: 1,488Gemini 3.1 Pro preview: 1,487LMArena Text · Coding#26 vs #11 of 163Kimi K3: 1,540Gemini 3.1 Pro preview: 1,521LMArena Text · Chinese#21 vs #10 of 161Kimi K3: 1,543Gemini 3.1 Pro preview: 1,528
  • Gemini 3.1 Pro preview
  • Kimi K3

Key differences

Gemini 3.1 Pro previewKimi K3
InputMaker’s official API · global · USD
$2.00 / 1M tokens Gemini API pricing · as of Nov 1, 2026
$3.00 / 1M tokens Moonshot AI platform pricing · as of Nov 1, 2026
OutputMaker’s official API · global · USD
$12.00 / 1M tokens Gemini API pricing · as of Nov 1, 2026
$15.00 / 1M tokens Moonshot AI platform pricing · as of Nov 1, 2026
Max output
65,536 Gemini 3.1 Pro Preview model · as of Nov 1, 2026
1,048,576 Kimi API chat completions reference · as of Nov 1, 2026
Input modalities
Text, Image, Video, Audio, PDF Gemini 3.1 Pro Preview model · as of Nov 1, 2026
Text, Image, Video moonshotai/Kimi-K3 model card · as of Oct 30, 2026
Cache readMaker’s official API · global · USD
$0.20 / 1M tokens Gemini API pricing · as of Nov 1, 2026
$0.30 / 1M tokens Moonshot AI platform pricing · as of Nov 1, 2026

These differences use verified vendor specifications or each maker’s official API on the same region, currency, meter and billing conditions. Different conditions remain side by side in the full table; they do not establish which model is cheaper. Declared features describe support, not measured quality or a recommendation. Missing evidence does not mean a feature is unsupported.

Full comparison

Gemini 3.1 Pro preview Google Kimi K3 Moonshot AI
Overview
ReleasedFeb 19, 2026 Jul 2026
Open weights— Yes
Knowledge cutoffJan 2025 Not stated
Specs
Context1.05M 1.05M
Max output65.54K 1.05M
Input modalitiesText, Image, Video, Audio, PDF Text, Image, Video
Output modalitiesText Text
ReasoningYes Yes
Reasoning effortslow, medium, high low, high, max
Reasoning can be offNot stated Yes
Tool useYes Yes
Structured outputYes Yes
Pricing · per 1M tokens
Input price$2.00Also priced under other conditions: Prompts over 200K tokens, Batch, Flex tier, Priority tier $3.00
Output price$12.00Also priced under other conditions: Prompts over 200K tokens, Batch, Flex tier, Priority tier $15.00
Cache read price$0.20Also priced under other conditions: Prompts over 200K tokens, Batch, Flex tier, Priority tier $0.30
Cache write price— $3.00Also priced under other conditions: 1-hour cache5-minute cache
Cache write price (1-hour cache)Not offered $6.001-hour cache
Blended price (3 input : 1 output)$4.50 $6.00
Pricing under conditions · per 1M tokens
Input price, long prompts$4.00Prompts over 200K tokens Not offered
Output price, long prompts$18.00Prompts over 200K tokens Not offered
Batch input price$1.00Batch Not offered
Batch output price$6.00Batch Not offered
Flex tier input price$1.00Flex tier Not offered
Flex tier output price$6.00Flex tier Not offered
Priority tier input price$3.60Priority tier Not offered
Priority tier output price$21.60Priority tier Not offered
Cited scores
Epoch Capabilities Index156.2 158.5
LMArena Text1,487 1,488 max effort
LMArena Text · Coding1,521 1,540 max effort
LMArena Vision1,296 —
LMArena Text · Chinese1,528 1,543 max effort
Epoch AI · GPQA Diamond94.4% high effort93.1% max effort
Epoch AI · FrontierMath Tiers 1–359.6% 72.2% max effort

Headline prices may come from different channels, regions or tiers. Check each source before choosing a model; missing facts stay blank.

Model details and sources

Cited scores