Model Comparison
R1 (Jan '25)
vs. GPT-5.3 Codex (xhigh)
Comparing 2 AI models · 12 benchmarks · DeepSeek, OpenAI
Recommended Pick
Op GPT-5.3 Codex (xhigh) 11 metric wins Strongest on: Throughput, Reasoning, Intelligence
Best Value
R1 (Jan '25)
100.0 value score
57.1 reasoning / $2.43/1M
Lowest Price
R1 (Jan '25)
$1.68/1M 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
Best value
R1 (Jan '25) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Reasoning gap
GPT-5.3 Codex (xhigh) leads R1 (Jan '25) by 4.5 points on reasoning.
Coding gap
GPT-5.3 Codex (xhigh) leads R1 (Jan '25) by 37.2 points on coding.
Top-pick rationale
GPT-5.3 Codex (xhigh) wins 11 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.
R1 (Jan '25)
DeepSeek
TTFT
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Time
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tok/s
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Tokens
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Cost
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GPT-5.3 Codex (xhigh)
OpenAI
TTFT
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Time
—
tok/s
—
Tokens
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Cost
—
Which answer was more useful?
Full Comparison
| Metric | De R1 (Jan '25) | Top Pick Op GPT-5.3 Codex (xhigh) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.68/1M | $1.75/1M |
| Output Cost | $4.70/1M | $14.00/1M |
| Blended (3:1) | $2.43/1M | $4.81/1M |
| Specifications | ||
| Organization | DeepSeek | OpenAI |
| Release Date | Jan 20, 2025 | Feb 5, 2026 |
| Performance & Speed | ||
| Throughput | — | 92.0 tok/s |
| TTFT | — | 56735ms |
| Latency | — | 56735ms |
| Composite Indices | ||
| Value Score | 100.0 | 54.5 |
| Reasoning Score | 57.1 | 61.7 |
| Intelligence | 18.8 | 53.6 |
| Coding | 15.9 | 53.1 |
| Math | 68.0 | — |
| Standard Benchmarks | ||
| GPQA | 70.8% | 91.5% |
| MMLU Pro | 84.4% | — |
| HLE | 9.3% | 39.9% |
| LiveCodeBench | 61.7% | — |
| MATH 500 | 96.6% | — |
| AIME 2025 | 68.0% | — |
| AIME (Original) | 68.3% | — |
| SciCode | 35.7% | 53.2% |
| LCR | 52.3% | 74.0% |
| IFBench | 39.0% | 75.4% |
| TAU-bench v2 | 11.4% | 86.0% |
| TerminalBench Hard | 6.1% | 53.0% |
Key Takeaways
R1 (Jan '25) offers the best value at $1.68/1M, 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
R1 (Jan '25)
- Cost-sensitive applications
- High-volume processing
GPT-5.3 Codex (xhigh)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
