Model Comparison
K2
vs. o3-pro
Comparing 2 AI models · 12 benchmarks · Kimi, OpenAI
Recommended Pick
KiK24 metric winsStrongest on: Value, Input price, Output price
Best Value
K2
100.0 value score
54.8 reasoning / $1.00/1M
Lowest Price
K2
$0.57/1M input price
Best Reasoning
o3-pro
58.5 reasoning score
Blends available reasoning benchmarks
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 35.1x cheaper on input tokens than o3-pro.
Reasoning gap
o3-pro leads K2 by 3.7 points on reasoning.
Top-pick rationale
K2 wins 4 measurable categories, including Value, Input price, Output price, Blended price.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
K2
Kimi
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
o3-pro
OpenAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
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Full Comparison
| Metric | Top Pick Ki K2 | Op o3-pro |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.57/1M | $20.00/1M |
| Output Cost | $2.30/1M | $80.00/1M |
| Blended (3:1) | $1.00/1M | $35.00/1M |
| Specifications | ||
| Organization | Kimi | OpenAI |
| Release Date | Jul 11, 2025 | Jun 10, 2025 |
| Performance & Speed | ||
| Throughput | — | — |
| TTFT | — | — |
| Latency | — | — |
| Composite Indices | ||
| Value Score | 100.0 | 3.1 |
| Reasoning Score | 54.8 | 58.5 |
| Intelligence | 19.4 | 32.5 |
| Math | 57.0 | — |
| Standard Benchmarks | ||
| GPQA | 76.6% | 84.5% |
| MMLU Pro | 82.4% | — |
| HLE | 7.0% | — |
| LiveCodeBench | 55.6% | — |
| MATH 500 | 97.1% | — |
| AIME 2025 | 57.0% | — |
| AIME (Original) | 69.3% | — |
| SciCode | 34.5% | — |
| LCR | 51.0% | — |
| IFBench | 41.5% | — |
| TAU-bench v2 | 61.1% | — |
| TerminalBench Hard | 15.9% | — |
Key Takeaways
K2 offers the best value at $0.57/1M,making it ideal for high-volume applications and cost-conscious projects.
o3-pro has the strongest reasoning profile with a 58.5 reasoning score,combining the available reasoning-heavy benchmarks.
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
o3-pro
- Complex reasoning tasks
- Research & analysis
