Gemini 3.8 Flash vs Kimi K2.8 Preview
Comparing Gemini 3.8 Flash and Kimi K2.8 Preview across benchmarks, pricing, and capabilities.
Google · Moonshot AI · Updated for 2026
Which is better?
Gemini 3.8 Flash and Kimi K2.8 Preview trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Gemini 3.8 Flash
- you want predictable pricing at $0.75/M input and $3.75/M output
Choose Kimi K2.8 Preview
- you want the most recent training data — it shipped Sep 2026
At a glance
The differences that matter most.
Individual benchmarks
13 reported for Gemini 3.8 Flash · 0 for Kimi K2.8 Preview
Gemini 3.8 Flash and Kimi K2.8 Previewdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Both models have the same input context window of 1,048,576 tokens. Only Gemini 3.8 Flash specifies output context (65,536 tokens).
Input capabilities
Documented input modalities across available providers
Both Gemini 3.8 Flash and Kimi K2.8 Preview support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 3.8 Flash
Kimi K2.8 Preview
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Gemini 3.8 Flash was released on 2026-09-02, while Kimi K2.8 Preview was released on 2026-09-11.
Kimi K2.8 Preview is 0 month newer than Gemini 3.8 Flash.
Sep 2, 2026
1 weeks ago
Sep 11, 2026
3 days ago
1w newerKnowledge Cutoff
When training data ends
Gemini 3.8 Flash has a documented knowledge cutoff of 2026-03-31, while Kimi K2.8 Preview's cutoff date is not specified.
We can confirm Gemini 3.8 Flash's training data extends to 2026-03-31, but cannot make a direct comparison without Kimi K2.8 Preview's cutoff date.
Mar 2026
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Provider Availability
Gemini 3.8 Flash is available from Google. Kimi K2.8 Preview is available from Moonshot AI.
Gemini 3.8 Flash
Kimi K2.8 Preview
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 3.8 Flash and Kimi K2.8 Preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 3.8 Flash vs Kimi K2.8 Preview.