Compare/Gemini 3 Flash Preview (Non-reasoning) vs Kimi K2.5 (Reasoning)

Gemini 3 Flash Preview (Non-reasoning)vsKimi K2.5 (Reasoning)

Side-by-side comparison of pricing, 12 benchmarks, and generation speed.

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Gemini 3 Flash Preview (Non-reasoning)

Input
$0.5/M
Output
$3/M
Speed
209 tok/s
TTFT
0.72s
Kimi

Kimi K2.5 (Reasoning)

Input
$0.6/M
Output
$3/M
Speed
39 tok/s
TTFT
1.28s

Winner by Category

Cheaper
Gemini 3 Flash Preview (Non-reasoning)
Faster (tok/s)
Gemini 3 Flash Preview (Non-reasoning)
Lower Latency
Gemini 3 Flash Preview (Non-reasoning)
Benchmarks (5-5)
Tie

Pricing Comparison

MetricGemini 3 Flash Preview (Non-reasoning)Kimi K2.5 (Reasoning)
Input ($/M tokens)$0.5$0.6
Output ($/M tokens)$3$3
Cost for 1M input + 100K output tokens:
Gemini 3 Flash Preview (Non-reasoning)$0.80
Kimi K2.5 (Reasoning)$0.90

Speed Comparison

Output Speed (tokens/s) — higher is better
Gemini 3 Flash Preview (Non-reasoning)
209 tok/s
Kimi K2.5 (Reasoning)
39 tok/s
Time to First Token (seconds) — lower is better
Gemini 3 Flash Preview (Non-reasoning)
0.72s
Kimi K2.5 (Reasoning)
1.28s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
27.438.1
Coding Index
Math Index
55.7
GPQA Diamond
81.2%87.9%
MMLU-Pro
88.2%
LiveCodeBench
79.7%
AIME 2025
55.7%
MATH-500
Humanity's Last Exam
14.1%29.4%
SciCode
49.9%49.0%
IFBench
55.1%70.2%
TerminalBench
31.8%34.8%
Gemini 3 Flash Preview (Non-reasoning)5 wins
5 winsKimi K2.5 (Reasoning)

Frequently Asked Questions

Which is cheaper, Gemini 3 Flash Preview (Non-reasoning) or Kimi K2.5 (Reasoning)?

Gemini 3 Flash Preview (Non-reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $1.13/M tokens vs $1.20/M for Kimi K2.5 (Reasoning).

Which model performs better on benchmarks?

It's a tie — both models win 5 benchmarks each across 12 evaluated categories. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

Gemini 3 Flash Preview (Non-reasoning) generates tokens faster at 209 tok/s vs 39 tok/s. Gemini 3 Flash Preview (Non-reasoning) also has lower time-to-first-token (0.72s vs 1.28s).

When should I use Gemini 3 Flash Preview (Non-reasoning) vs Kimi K2.5 (Reasoning)?

Choose based on your priorities: Gemini 3 Flash Preview (Non-reasoning) for lower cost, both perform similarly on benchmarks, and Gemini 3 Flash Preview (Non-reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.