Model Comparison

Gemini 3.5 Flash vs Kimi K3Which is better in 2026?

Kimi K3 significantly outperforms across most benchmarks. Gemini 3.5 Flash is 1.8x cheaper per token.

Verdict: Gemini 3.5 Flash vs Kimi K3 — which is better?

Gemini 3.5 Flash (by Google) and Kimi K3 (by Moonshot AI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Gemini 3.5 Flash outperforms in 1 benchmarks (MMMU-Pro), while Kimi K3 is better at 5 benchmarks (CharXiv-R, GDPval-AA, Humanity's Last Exam, MCP Atlas, Toolathlon). Kimi K3 significantly outperforms across most benchmarks.

On price, Gemini 3.5 Flash is roughly 1.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose Gemini 3.5 Flash if…

  • cost matters — it's about 1.8x cheaper per token

Choose Kimi K3 if…

  • you want the strongest raw capability — it leads on 5 of 6 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Gemini 3.5 Flash outperforms in 1 benchmarks (MMMU-Pro), while Kimi K3 is better at 5 benchmarks (CharXiv-R, GDPval-AA, Humanity's Last Exam, MCP Atlas, Toolathlon).

Kimi K3 significantly outperforms across most benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 3.5 Flash costs less

For input processing, Gemini 3.5 Flash ($1.50/1M tokens) is 2.0x cheaper than Kimi K3 ($3.00/1M tokens).

For output processing, Gemini 3.5 Flash ($9.00/1M tokens) is 1.7x cheaper than Kimi K3 ($15.00/1M tokens).

In conclusion, Kimi K3 is more expensive than Gemini 3.5 Flash.*

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

Lowest available price from all providers
Fri Jul 17 2026 • llm-stats.com
Google
Gemini 3.5 Flash
Input tokens$1.50
Output tokens$9.00
Best providerGoogle
Moonshot AI
Kimi K3
Input tokens$3.00
Output tokens$15.00
Best providerUnknown Organization
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,048,576 tokens. Kimi K3 can generate longer responses up to 1,048,576 tokens, while Gemini 3.5 Flash is limited to 65,536 tokens.

Google
Gemini 3.5 Flash
Input1,048,576 tokens
Output65,536 tokens
Moonshot AI
Kimi K3
Input1,048,576 tokens
Output1,048,576 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.5 Flash and Kimi K3 support multimodal inputs.

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

Gemini 3.5 Flash

Text
Images
Audio
Video

Kimi K3

Text
Images
Audio
Video

Release Timeline

When each model was launched

Gemini 3.5 Flash was released on 2026-05-19, while Kimi K3 was released on 2026-07-16.

Kimi K3 is 2 months newer than Gemini 3.5 Flash.

Gemini 3.5 Flash

May 19, 2026

1 months ago

Kimi K3

Jul 16, 2026

1 days ago

1mo newer

Knowledge Cutoff

When training data ends

Gemini 3.5 Flash has a documented knowledge cutoff of 2026-01-31, while Kimi K3's cutoff date is not specified.

We can confirm Gemini 3.5 Flash's training data extends to 2026-01-31, but cannot make a direct comparison without Kimi K3's cutoff date.

Gemini 3.5 Flash

Jan 2026

Kimi K3

—

Provider Availability

Gemini 3.5 Flash is available from Google. Kimi K3 is available from Moonshot AI.

Gemini 3.5 Flash

google logo
Google
Input Price:Input: $1.50/1MOutput Price:Output: $9.00/1M

Kimi K3

moonshot logo
Unknown Organization
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Less expensive input tokens
Less expensive output tokens
Higher MMMU-Pro score (83.6% vs 81.6%)
Moonshot AI
Has open weights
Higher CharXiv-R score (91.3% vs 84.2%)
Higher GDPval-AA score (55.6% vs 45.7%)
Higher Humanity's Last Exam score (56.0% vs 40.2%)
Higher MCP Atlas score (84.2% vs 83.6%)
Higher Toolathlon score (73.2% vs 56.5%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 3.5 Flash and Kimi K3 side-by-side, then vote on the output you prefer.

Gemini 3.5 Flash
✓ Preferred
Kimi K3
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 3.5 Flash
Moonshot AI
Kimi K3

FAQ

Common questions about Gemini 3.5 Flash vs Kimi K3.

Which is better, Gemini 3.5 Flash or Kimi K3?

Kimi K3 significantly outperforms across most benchmarks. Gemini 3.5 Flash is made by Google and Kimi K3 is made by Moonshot AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3.5 Flash compare to Kimi K3 in benchmarks?

Gemini 3.5 Flash scores CharXiv-R: 84.2%, MCP Atlas: 83.6%, MMMU-Pro: 83.6%, OSWorld-Verified: 78.4%, Terminal-Bench 2.0: 76.2%. Kimi K3 scores MathVision: 97.8%, DeepSearchQA: 95.0%, GPQA: 93.5%, CharXiv-R: 91.3%, BrowseComp: 91.2%.

Is Gemini 3.5 Flash cheaper than Kimi K3?

Gemini 3.5 Flash is 2.0x cheaper for input tokens. Gemini 3.5 Flash costs $1.50/M input and $9.00/M output via google. Kimi K3 costs $3.00/M input and $15.00/M output via moonshot.

What are the context window sizes for Gemini 3.5 Flash and Kimi K3?

Gemini 3.5 Flash supports 1.0M tokens and Kimi K3 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 3.5 Flash and Kimi K3?

Key differences include input pricing ($1.50 vs $3.00/M), licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.5 Flash and Kimi K3?

Gemini 3.5 Flash is developed by Google and Kimi K3 is developed by Moonshot AI.

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