Model Comparison
GPT-5.1 Codex (high)
vs. Kimi K2.6
Comparing 2 AI models · 10 benchmarks · OpenAI, MoonshotAI
Recommended Pick
Mo Kimi K2.6 14 metric wins Strongest on: Value, Input price, Output price
Best Value
Kimi K2.6
100.0 value score
60.3 reasoning / $1.71/1M
Lowest Price
Kimi K2.6
$0.95/1M input price
Best Reasoning
GPT-5.1 Codex (high)
68.8 reasoning score
Blends available reasoning benchmarks
Best for Coding
Kimi K2.6
47.1 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
Kimi K2.6 has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Kimi K2.6 is 1.3x cheaper on input tokens than GPT-5.1 Codex (high).
Speed gap
GPT-5.1 Codex (high) generates about 4.3x as many tokens per second as Kimi K2.6.
Reasoning gap
GPT-5.1 Codex (high) leads Kimi K2.6 by 8.5 points on reasoning.
Coding gap
Kimi K2.6 leads GPT-5.1 Codex (high) by 10.5 points on coding.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GPT-5.1 Codex (high)
OpenAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Kimi K2.6
MoonshotAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Full Comparison
| Metric | Op GPT-5.1 Codex (high) | Top Pick Mo Kimi K2.6 |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.25/1M | $0.95/1M |
| Output Cost | $10.00/1M | $4.00/1M |
| Blended (3:1) | $3.44/1M | $1.71/1M |
| Specifications | ||
| Organization | OpenAI | MoonshotAI |
| Release Date | Nov 13, 2025 | Apr 20, 2026 |
| Performance & Speed | ||
| Throughput | 177.1 tok/s | 41.0 tok/s |
| TTFT | 5015ms | 1367ms |
| Latency | 5015ms | 110003ms |
| Composite Indices | ||
| Value Score | 56.8 | 100.0 |
| Reasoning Score | 68.8 | 60.3 |
| Intelligence | 43.1 | 53.9 |
| Coding | 36.6 | 47.1 |
| Math | 95.7 | — |
| Standard Benchmarks | ||
| GPQA | 86.0% | 91.1% |
| MMLU Pro | 86.0% | — |
| HLE | 23.4% | 35.9% |
| LiveCodeBench | 84.9% | — |
| AIME 2025 | 95.7% | — |
| SciCode | 40.2% | 53.5% |
| LCR | 67.3% | 69.7% |
| IFBench | 70.0% | 76.0% |
| TAU-bench v2 | 83.0% | 95.9% |
| TerminalBench Hard | 34.8% | 43.9% |
Key Takeaways
Kimi K2.6 offers the best value at $0.95/1M, making it ideal for high-volume applications and cost-conscious projects.
GPT-5.1 Codex (high) has the strongest reasoning profile with a 68.8 reasoning score, combining the available reasoning-heavy benchmarks.
Kimi K2.6 reaches a 47.1 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
GPT-5.1 Codex (high)
- Complex reasoning tasks
- Research & analysis
Kimi K2.6
- Cost-sensitive applications
- High-volume processing
- Code generation
- Software development
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