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Gemini 3 Flash vs Kimi K3.1 Pro

Kimi K3.1 Pro leads the LLM Stats Score 55.5 to 36.3. Gemini 3 Flash is 3.6x cheaper per token.

Google · Moonshot AI · Updated for 2026

Which is better?

Kimi K3.1 Pro leads the overall LLM Stats Score 55.5 to 36.3, ranking #5 overall.

In the 4 individual benchmarks reported for both models, Kimi K3.1 Pro wins 4; this is a narrower head-to-head signal than the composite indexes.

On price, Gemini 3 Flash is roughly 3.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Kimi K3.1 Pro also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Gemini 3 Flash

  • cost matters — it's about 3.6x cheaper per token

Choose Kimi K3.1 Pro

  • overall performance matters — it scores 55.5 and ranks #5 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 4 of 4 exact shared results
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

Gemini 3 Flash
Google
Kimi K3.1 Pro
Moonshot AI
Core performance indexes
LLM Stats Score
36.3
#98
55.5
#5
Reasoning
37.1
#88
54.3
#6
Coding
22.1
#104
42.7
#9
Agents
17.6
#98
41.6
#5
Cost, coverage & limits
Benchmark wins
0 of 4
4 of 4
Input price
$0.50 / M
$2.00 / M
Output price
$3.00 / M
$10.00 / M
Context window
1,000,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

4 shared
Index
Gemini 3 Flash
Kimi K3.1 Pro
Math
37.3#36
38.6#26
Vision
25.6#66
40.5#4
Tool use
15.6#109
30.4#14
Multimodal
26.4#55
40.8#2
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

24 reported for Gemini 3 Flash · 30 for Kimi K3.1 Pro

4 shared

Gemini 3 Flash outperforms in 0 benchmarks, while Kimi K3.1 Pro is better at 4 benchmarks (CharXiv-R, GPQA, Humanity's Last Exam, MMMU-Pro).

Kimi K3.1 Pro significantly outperforms across most benchmarks.

Thu Oct 29 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Gemini 3 Flash costs less

For input processing, Gemini 3 Flash ($0.50/1M tokens) is 4.0x cheaper than Kimi K3.1 Pro ($2.00/1M tokens).

For output processing, Gemini 3 Flash ($3.00/1M tokens) is 3.3x cheaper than Kimi K3.1 Pro ($10.00/1M tokens).

In conclusion, Kimi K3.1 Pro is more expensive than Gemini 3 Flash.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Thu Oct 29 2026 • llm-stats.com
Google
Gemini 3 Flash
Input tokens$0.50
Output tokens$3.00
Best providerGoogle
Moonshot AI
Kimi K3.1 Pro
Input tokens$2.00
Output tokens$10.00
Best providerUnknown Organization
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Kimi K3.1 Pro accepts 1,048,576 input tokens compared to Gemini 3 Flash's 1,000,000 tokens. Kimi K3.1 Pro can generate longer responses up to 1,048,576 tokens, while Gemini 3 Flash is limited to 65,536 tokens.

Google
Gemini 3 Flash
Input1,000,000 tokens
Output65,536 tokens
Moonshot AI
Kimi K3.1 Pro
Input1,048,576 tokens
Output1,048,576 tokens
Thu Oct 29 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Gemini 3 Flash and Kimi K3.1 Pro support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 3 Flash

Text
Images
Audio
Video

Kimi K3.1 Pro

Text
Images
Audio
Video

Release Timeline

When each model was launched

Gemini 3 Flash was released on 2025-12-17, while Kimi K3.1 Pro was released on 2026-10-23.

Kimi K3.1 Pro is 10 months newer than Gemini 3 Flash.

Gemini 3 Flash

Dec 17, 2025

10 months ago

Kimi K3.1 Pro

Oct 23, 2026

6 days ago

10mo newer

Knowledge Cutoff

When training data ends

Gemini 3 Flash has a documented knowledge cutoff of 2025-01-31, while Kimi K3.1 Pro's cutoff date is not specified.

We can confirm Gemini 3 Flash's training data extends to 2025-01-31, but cannot make a direct comparison without Kimi K3.1 Pro's cutoff date.

Gemini 3 Flash

Jan 2025

Kimi K3.1 Pro

—

Provider Availability

Gemini 3 Flash is available from Google. Kimi K3.1 Pro is available from Moonshot AI.

Gemini 3 Flash

google logo
Google
Input Price:Input: $0.50/1MOutput Price:Output: $3.00/1M

Kimi K3.1 Pro

moonshot logo
Unknown Organization
Input Price:Input: $2.00/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Gemini 3 Flash and Kimi K3.1 Pro side-by-side, then vote on the output you prefer.

Gemini 3 Flash
✓ Preferred
Kimi K3.1 Pro
Open in Playground

FAQ

Common questions about Gemini 3 Flash vs Kimi K3.1 Pro.

Which is better, Gemini 3 Flash or Kimi K3.1 Pro?

Kimi K3.1 Pro leads the LLM Stats Score 55.5 to 36.3. Gemini 3 Flash is made by Google and Kimi K3.1 Pro is made by Moonshot AI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 3 Flash compare to Kimi K3.1 Pro in benchmarks?

Gemini 3 Flash scores Vending-Bench 2: 100.0%, AIME 2025: 99.7%, Global PIQA: 92.8%, MMMLU: 91.8%, GPQA: 90.4%. Kimi K3.1 Pro scores BabyVision: 95.4%, GPQA: 94.2%, BenchCAD (with Python tool): 92.7%, BrowseComp: 92.1%, Chartography: 90.2%.

Is Gemini 3 Flash cheaper than Kimi K3.1 Pro?

Gemini 3 Flash is 4.0x cheaper for input tokens. Gemini 3 Flash costs $0.50/M input and $3.00/M output via google. Kimi K3.1 Pro costs $2.00/M input and $10.00/M output via moonshot.

What are the context window sizes for Gemini 3 Flash and Kimi K3.1 Pro?

Gemini 3 Flash supports 1.0M tokens and Kimi K3.1 Pro supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3 Flash and Kimi K3.1 Pro?

Key differences include LLM Stats Score (36.3 vs 55.5), context window (1.0M vs 1.0M), input pricing ($0.50 vs $2.00/M), licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3 Flash and Kimi K3.1 Pro?

Gemini 3 Flash is developed by Google and Kimi K3.1 Pro is developed by Moonshot AI.

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