Model Comparison
Claude 4.5 Haiku (Reasoning)
vs. GPT-5.4 nano (medium)
Comparing 2 AI models · 10 benchmarks · Anthropic, OpenAI
Recommended Pick
OpGPT-5.4 nano (medium)11 metric winsStrongest on: Value, Input price, Output price
Best Value
GPT-5.4 nano (medium)
100.0 value score
40.3 reasoning / $0.46/1M
Lowest Price
GPT-5.4 nano (medium)
$0.20/1M input price
Best Reasoning
Claude 4.5 Haiku (Reasoning)
54.8 reasoning score
Blends available reasoning benchmarks
Best for Coding
Claude 4.5 Haiku (Reasoning)
43.9 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-5.4 nano (medium) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
GPT-5.4 nano (medium) is 5.0x cheaper on input tokens than Claude 4.5 Haiku (Reasoning).
Reasoning gap
Claude 4.5 Haiku (Reasoning) leads GPT-5.4 nano (medium) by 14.4 points on reasoning.
Top-pick rationale
GPT-5.4 nano (medium) wins 11 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.
Claude 4.5 Haiku (Reasoning)
Anthropic
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-5.4 nano (medium)
OpenAI
TTFT
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Time
—
tok/s
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Tokens
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Cost
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Which answer was more useful?
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Full Comparison
| Metric | An Claude 4.5 Haiku (Reasoning) | Top Pick Op GPT-5.4 nano (medium) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.00/1M | $0.20/1M |
| Output Cost | $5.00/1M | $1.25/1M |
| Blended (3:1) | $2.00/1M | $0.46/1M |
| Specifications | ||
| Organization | Anthropic | OpenAI |
| Release Date | Oct 15, 2025 | Mar 17, 2026 |
| Performance & Speed | ||
| Throughput | 148.1 tok/s | — |
| TTFT | 13283ms | — |
| Latency | 13283ms | — |
| Composite Indices | ||
| Value Score | 31.4 | 100.0 |
| Reasoning Score | 54.8 | 40.3 |
| Intelligence | 29.6 | 30.2 |
| Coding | 43.9 | — |
| Math | 83.7 | — |
| Standard Benchmarks | ||
| GPQA | 67.2% | 76.1% |
| MMLU Pro | 76.0% | — |
| HLE | 9.7% | 14.7% |
| LiveCodeBench | 61.5% | — |
| AIME 2025 | 83.7% | — |
| SciCode | 43.3% | 38.4% |
| LCR | 70.3% | 57.3% |
| IFBench | 54.3% | 64.4% |
| TAU-bench v2 | 54.7% | 52.6% |
| TerminalBench Hard | 27.3% | 33.3% |
Key Takeaways
GPT-5.4 nano (medium) offers the best value at $0.20/1M,making it ideal for high-volume applications and cost-conscious projects.
Claude 4.5 Haiku (Reasoning) has the strongest reasoning profile with a 54.8 reasoning score,combining the available reasoning-heavy benchmarks.
Claude 4.5 Haiku (Reasoning) reaches a 43.9 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
Claude 4.5 Haiku (Reasoning)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
GPT-5.4 nano (medium)
- Cost-sensitive applications
- High-volume processing
