Model Comparison
GPT-5.1 Codex mini (high)
vs. GPT-5 (minimal)
Comparing 2 AI models · 12 benchmarks · OpenAI
Recommended Pick
Op GPT-5.1 Codex mini (high) 18 metric wins Strongest on: Value, Input price, Output price
Best Value
GPT-5.1 Codex mini (high)
100.0 value score
64.0 reasoning / $0.69/1M
Lowest Price
GPT-5.1 Codex mini (high)
$0.25/1M input price
Best Reasoning
GPT-5.1 Codex mini (high)
64.0 reasoning score
Blends available reasoning benchmarks
Best for Coding
GPT-5.1 Codex mini (high)
36.4 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
GPT-5.1 Codex mini (high) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
GPT-5.1 Codex mini (high) is 5.0x cheaper on input tokens than GPT-5 (minimal).
Speed gap
GPT-5.1 Codex mini (high) generates about 2.4x as many tokens per second as GPT-5 (minimal).
Reasoning gap
GPT-5.1 Codex mini (high) leads GPT-5 (minimal) by 23.6 points on reasoning.
Coding gap
GPT-5.1 Codex mini (high) leads GPT-5 (minimal) by 11.4 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 mini (high)
OpenAI
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 (minimal)
OpenAI
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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Which answer was more useful?
Full Comparison
| Metric | Top Pick Op GPT-5.1 Codex mini (high) | Op GPT-5 (minimal) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.25/1M | $1.25/1M |
| Output Cost | $2.00/1M | $10.00/1M |
| Blended (3:1) | $0.69/1M | $3.44/1M |
| Specifications | ||
| Organization | OpenAI | OpenAI |
| Release Date | Nov 13, 2025 | Aug 7, 2025 |
| Performance & Speed | ||
| Throughput | 209.4 tok/s | 86.4 tok/s |
| TTFT | 5559ms | 869ms |
| Latency | 5559ms | 869ms |
| Composite Indices | ||
| Value Score | 100.0 | 12.6 |
| Reasoning Score | 64.0 | 40.4 |
| Intelligence | 38.6 | 23.9 |
| Coding | 36.4 | 25.0 |
| Math | 91.7 | 31.7 |
| Standard Benchmarks | ||
| GPQA | 81.3% | 67.3% |
| MMLU Pro | 82.0% | 80.6% |
| HLE | 16.9% | 5.4% |
| LiveCodeBench | 83.6% | 55.8% |
| MATH 500 | — | 86.1% |
| AIME 2025 | 91.7% | 31.7% |
| AIME (Original) | — | 36.7% |
| SciCode | 42.6% | 38.8% |
| LCR | 62.7% | 25.0% |
| IFBench | 67.9% | 45.6% |
| TAU-bench v2 | 62.9% | 67.0% |
| TerminalBench Hard | 33.3% | 18.2% |
Key Takeaways
GPT-5.1 Codex mini (high) offers the best value at $0.25/1M, making it ideal for high-volume applications and cost-conscious projects.
GPT-5.1 Codex mini (high) has the strongest reasoning profile with a 64.0 reasoning score, combining the available reasoning-heavy benchmarks.
GPT-5.1 Codex mini (high) reaches a 36.4 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 mini (high)
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
GPT-5 (minimal)
- General-purpose AI
- Versatile applications
