Model Comparison
Gemini 3 Flash vs Kimi K3Which is better in 2026?
Kimi K3 significantly outperforms across most benchmarks. Gemini 3 Flash is 5.3x cheaper per token.
Verdict: Gemini 3 Flash vs Kimi K3 — which is better?
Gemini 3 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 Flash outperforms in 0 benchmarks, while Kimi K3 is better at 6 benchmarks (CharXiv-R, GPQA, Humanity's Last Exam, MCP Atlas, MMMU-Pro, Toolathlon). Kimi K3 significantly outperforms across most benchmarks.
On price, Gemini 3 Flash is roughly 5.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Kimi K3 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Choose Gemini 3 Flash if…
- cost matters — it's about 5.3x cheaper per token
Choose Kimi K3 if…
- you want the strongest raw capability — it leads on 6 of 6 shared benchmarks
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Jul 2026
Performance Benchmarks
Comparative analysis across standard metrics
Gemini 3 Flash outperforms in 0 benchmarks, while Kimi K3 is better at 6 benchmarks (CharXiv-R, GPQA, Humanity's Last Exam, MCP Atlas, MMMU-Pro, Toolathlon).
Kimi K3 significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 3 Flash ($0.50/1M tokens) is 6.0x cheaper than Kimi K3 ($3.00/1M tokens).
For output processing, Gemini 3 Flash ($3.00/1M tokens) is 5.0x cheaper than Kimi K3 ($15.00/1M tokens).
In conclusion, Kimi K3 is more expensive than Gemini 3 Flash.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Kimi K3 accepts 1,048,576 input tokens compared to Gemini 3 Flash's 1,000,000 tokens. Kimi K3 can generate longer responses up to 1,048,576 tokens, while Gemini 3 Flash is limited to 65,536 tokens.
Input Capabilities
Supported data types and modalities
Both Gemini 3 Flash and Kimi K3 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 3 Flash
Kimi K3
Release Timeline
When each model was launched
Gemini 3 Flash was released on 2025-12-17, while Kimi K3 was released on 2026-07-16.
Kimi K3 is 7 months newer than Gemini 3 Flash.
Dec 17, 2025
7 months ago
Jul 16, 2026
1 days ago
7mo newerKnowledge Cutoff
When training data ends
Gemini 3 Flash has a documented knowledge cutoff of 2025-01-31, while Kimi K3'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's cutoff date.
Jan 2025
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Provider Availability
Gemini 3 Flash is available from Google. Kimi K3 is available from Moonshot AI.
Gemini 3 Flash
Kimi K3
Outputs Comparison
Key Takeaways
Kimi K3
View detailsMoonshot AI
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against Gemini 3 Flash and Kimi K3 side-by-side, then vote on the output you prefer.
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FAQ
Common questions about Gemini 3 Flash vs Kimi K3.