ResearchLLM Verifications Leaderboard

Data as of · 78 models, 80 questions · reviewed by Suhas Bhairav · methodology

Head to head · tested 27 Oct 2026

Gemini 3.1 Pro Preview vs Kimi K3.1 Pro: accuracy, speed and price

Similar accuracy; Kimi K3.1 Pro costs less per question.

GoogleGemini 3.1 Pro Preview77.5% score · #9$0.017 per question124 tok/sMoonshotAIKimi K3.1 Pro77.5% score · #9$0.01 per question38 tok/s

Verdict

Built from the measurements below

  • Accuracy is too close to call: Gemini 3.1 Pro Preview scored 77.5% and Kimi K3.1 Pro 77.5% on the same 80 questions, a gap within what chance alone could produce.
  • Kimi K3.1 Pro is 1.6× cheaper per question as billed ($0.01 vs $0.017), reasoning tokens included.
  • Gemini 3.1 Pro Preview generates text 3.3× faster: 124 tokens per second against 38.
  • Kimi K3.1 Pro starts answering sooner: 1.3 s to the first token, against 3.4 s for Gemini 3.1 Pro Preview.

Which should you choose?

Choose Gemini 3.1 Pro Preview for faster streaming. Choose Kimi K3.1 Pro for the lower cost per correct answer ($0.014 against $0.022) and a quicker first token.

Accuracy gap +0.0 points (z = 0.00). A winner is called only when z is at least 1.96, the usual 95% threshold. Speed, latency and price need a 10% margin.

Head to head

Same questions, same prompt, same API

MeasureGemini 3.1 Pro PreviewKimi K3.1 ProEdge
Verification scoreHigher is better77.5%77.5%Too close to call
Cost per questionLower is better$0.017$0.01Kimi K3.1 Pro
Output speedHigher is better12438Gemini 3.1 Pro Preview
Time to first tokenLower is better3.4 s1.3 sKimi K3.1 Pro
End-to-end response timeLower is better8.9 s19.6 sGemini 3.1 Pro Preview
Tokens per questionLower is better1,382973Kimi K3.1 Pro
Context windowHigher is better1M1MSimilar

Side by side

Bars are scaled to the larger of the two values. The winner on each measure is marked in bold.

Every measure

Gemini 3.1 Pro Preview first, Kimi K3.1 Pro second

Verification scorehigher is better
Gemini 3.1 Pro Preview77.5%
Kimi K3.1 Pro77.5%
Cost per questionlower is better
Gemini 3.1 Pro Preview$0.017
Kimi K3.1 Pro$0.01
Output speedhigher is better
Gemini 3.1 Pro Preview124
Kimi K3.1 Pro38
Time to first tokenlower is better
Gemini 3.1 Pro Preview3.4 s
Kimi K3.1 Pro1.3 s
End-to-end response timelower is better
Gemini 3.1 Pro Preview8.9 s
Kimi K3.1 Pro19.6 s
Tokens per questionlower is better
Gemini 3.1 Pro Preview1,382
Kimi K3.1 Pro973
Context windowhigher is better
Gemini 3.1 Pro Preview1M
Kimi K3.1 Pro1M

Score vs. cost per question

Both models in color, every other model in grey

Most attractive quadrant0255075100$0.00001$0.0001$0.001$0.01$0.10Cost per question (USD, log) →Verification score (%) →Qwen3.8 2.4T A95BCommand AReka Flash 3Gemma 4 26B A4BGemma 4 31BQwen3.5 397B A17BHermes 4 405BMuse WonderGrok 4.7o3gpt-oss-20bMinistral 3 3B 2512Nova Micro 1.0Phi 4Granite 4.2 8BHy3GLM 5.3 FlashSolar Pro 4Trinity Large ThinkingMiniMax M3Mistral Large 4Claude Opus 5.5GPT-6.1 SolGemini 4 ArgonGPT-5.4GPT-6 Lunagpt-oss-120bLlama 4 Maverick

Specifications and pricing

From OpenRouter's catalogue, plus the leaderboard's test dates

SpecificationGemini 3.1 Pro PreviewKimi K3.1 Pro
CreatorGoogleMoonshotAI
Released19 Feb 202623 Oct 2026
Weights——
ReasoningYesYes
Inputaudio, file, image, text, videotext, image, video
Outputtexttext
Context window1M tokens1M tokens
Knowledge cutoff——
List price in / out per 1M$2 / $12$2 / $10
Blended price per 1M (3:1)$4.50$4.00
Cheapest hostGoogle · $1 / $6Moonshot AI · $2 / $10
Hosts on OpenRouter21
Last tested26 Oct 202625 Oct 2026

Compare any two models →

Gemini 3.1 Pro Preview vs Kimi K3.1 Pro: frequently asked questions

Is Gemini 3.1 Pro Preview better than Kimi K3.1 Pro?
On accuracy they are statistically tied: Gemini 3.1 Pro Preview scored 77.5% and Kimi K3.1 Pro 77.5% on the same 80 questions from open datasets. Similar accuracy; Kimi K3.1 Pro costs less per question.
Which is cheaper, Gemini 3.1 Pro Preview or Kimi K3.1 Pro?
Kimi K3.1 Pro is cheaper: $0.01 per question as billed, against $0.017. List prices: Gemini 3.1 Pro Preview $2 in / $12 out, Kimi K3.1 Pro $2 in / $10 out per million tokens.
Which is faster, Gemini 3.1 Pro Preview or Kimi K3.1 Pro?
Gemini 3.1 Pro Preview is faster at 124 output tokens per second, against 38. Time to first token: 3.4 s for Gemini 3.1 Pro Preview, 1.3 s for Kimi K3.1 Pro.
Which has the larger context window, Gemini 3.1 Pro Preview or Kimi K3.1 Pro?
Both accept about the same amount of context: 1M and 1M tokens.