Model Comparison
K2
vs. Gemini 3.1 Pro Preview
Comparing 2 AI models · 12 benchmarks · Kimi, Google
Recommended Pick
GoGemini 3.1 Pro Preview10 metric winsStrongest on: Throughput, Reasoning, Intelligence
Best Value
K2
100.0 value score
54.9 reasoning / $1.00/1M
Lowest Price
K2
$0.57/1M input price
Best Reasoning
Gemini 3.1 Pro Preview
62.9 reasoning score
Blends available reasoning benchmarks
Best for Coding
Gemini 3.1 Pro Preview
68.8 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Best value
K2 has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
K2 is 3.5x cheaper on input tokens than Gemini 3.1 Pro Preview.
Reasoning gap
Gemini 3.1 Pro Preview leads K2 by 8.1 points on reasoning.
Top-pick rationale
Gemini 3.1 Pro Preview wins 10 measurable categories, including Throughput, Reasoning, Intelligence, GPQA.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
K2
Kimi
TTFT
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Time
—
tok/s
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Tokens
—
Cost
—
Gemini 3.1 Pro Preview
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
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Full Comparison
| Metric | Ki K2 | Top Pick Go Gemini 3.1 Pro Preview |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.57/1M | $2.00/1M |
| Output Cost | $2.30/1M | $12.00/1M |
| Blended (3:1) | $1.00/1M | $4.50/1M |
| Specifications | ||
| Organization | Kimi | |
| Release Date | Jul 11, 2025 | Feb 19, 2026 |
| Performance & Speed | ||
| Throughput | — | 129.5 tok/s |
| TTFT | — | 22922ms |
| Latency | — | 22922ms |
| Composite Indices | ||
| Value Score | 100.0 | 25.5 |
| Reasoning Score | 54.9 | 62.9 |
| Intelligence | 19.7 | 47.7 |
| Coding | — | 68.8 |
| Math | 57.0 | — |
| Standard Benchmarks | ||
| GPQA | 76.6% | 94.1% |
| MMLU Pro | 82.4% | — |
| HLE | 7.4% | 47.0% |
| LiveCodeBench | 55.6% | — |
| MATH 500 | 97.1% | — |
| AIME 2025 | 57.0% | — |
| AIME (Original) | 69.3% | — |
| SciCode | 34.5% | 58.9% |
| LCR | 53.0% | 79.0% |
| IFBench | 41.5% | 77.1% |
| TAU-bench v2 | 61.1% | 95.6% |
| TerminalBench Hard | 15.9% | 53.8% |
Key Takeaways
K2 offers the best value at $0.57/1M,making it ideal for high-volume applications and cost-conscious projects.
Gemini 3.1 Pro Preview has the strongest reasoning profile with a 62.9 reasoning score,combining the available reasoning-heavy benchmarks.
Gemini 3.1 Pro Preview reaches a 68.8 coding index,making it the top choice for software development and code generation tasks.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
K2
- Cost-sensitive applications
- High-volume processing
Gemini 3.1 Pro Preview
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
