Model Comparison
MiMo-V2-Omni
vs. GPT-5.3 Codex (xhigh)
Comparing 2 AI models · 7 benchmarks · Xiaomi, OpenAI
Recommended Pick
Op GPT-5.3 Codex (xhigh) 10 metric wins Strongest on: Throughput, Reasoning, Intelligence
Lowest Price
MiMo-V2-Omni
$0.00/1M input price
Best Reasoning
GPT-5.3 Codex (xhigh)
61.7 reasoning score
Blends available reasoning benchmarks
Best for Coding
GPT-5.3 Codex (xhigh)
53.1 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
MiMo-V2-Omni is ∞x cheaper on input tokens than GPT-5.3 Codex (xhigh).
Speed gap
GPT-5.3 Codex (xhigh) generates about 1.2x as many tokens per second as MiMo-V2-Omni.
Reasoning gap
GPT-5.3 Codex (xhigh) leads MiMo-V2-Omni by 13.0 points on reasoning.
Coding gap
GPT-5.3 Codex (xhigh) leads MiMo-V2-Omni by 17.6 points on coding.
Top-pick rationale
GPT-5.3 Codex (xhigh) wins 10 measurable categories, including Throughput, Reasoning, Intelligence, Coding.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
MiMo-V2-Omni
Xiaomi
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
GPT-5.3 Codex (xhigh)
OpenAI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Full Comparison
| Metric | Xi MiMo-V2-Omni | Top Pick Op GPT-5.3 Codex (xhigh) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.00/1M | $1.75/1M |
| Output Cost | $0.00/1M | $14.00/1M |
| Blended (3:1) | — | $4.81/1M |
| Specifications | ||
| Organization | Xiaomi | OpenAI |
| Release Date | Mar 19, 2026 | Feb 5, 2026 |
| Performance & Speed | ||
| Throughput | 79.7 tok/s | 92.0 tok/s |
| TTFT | 2143ms | 56735ms |
| Latency | 27225ms | 56735ms |
| Composite Indices | ||
| Value Score | — | 100.0 |
| Reasoning Score | 48.7 | 61.7 |
| Intelligence | 43.4 | 53.6 |
| Coding | 35.5 | 53.1 |
| Standard Benchmarks | ||
| GPQA | 82.8% | 91.5% |
| HLE | 19.9% | 39.9% |
| SciCode | 36.7% | 53.2% |
| LCR | 66.7% | 74.0% |
| IFBench | 53.5% | 75.4% |
| TAU-bench v2 | 91.2% | 86.0% |
| TerminalBench Hard | 34.8% | 53.0% |
Key Takeaways
MiMo-V2-Omni offers the best value at $0.00/1M, making it ideal for high-volume applications and cost-conscious projects.
GPT-5.3 Codex (xhigh) has the strongest reasoning profile with a 61.7 reasoning score, combining the available reasoning-heavy benchmarks.
GPT-5.3 Codex (xhigh) reaches a 53.1 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
MiMo-V2-Omni
- Cost-sensitive applications
- High-volume processing
GPT-5.3 Codex (xhigh)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
