Model Comparison
GPT-5.4 (xhigh)
vs. Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)
Comparing 2 AI models · 7 benchmarks · OpenAI, Anthropic
Recommended Pick
OpGPT-5.4 (xhigh)8 metric winsStrongest on: Value, Input price, Output price
Best Value
GPT-5.4 (xhigh)
100.0 value score
62.9 reasoning / $5.63/1M
Lowest Price
GPT-5.4 (xhigh)
$2.50/1M input price
Best Reasoning
Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)
70.2 reasoning score
Blends available reasoning benchmarks
Best for Coding
Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)
77.0 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 (xhigh) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
GPT-5.4 (xhigh) is 2.0x cheaper on input tokens than Claude Opus 5 (Adaptive Reasoning, Xhigh Effort).
Reasoning gap
Claude Opus 5 (Adaptive Reasoning, Xhigh Effort) leads GPT-5.4 (xhigh) by 7.3 points on reasoning.
Coding gap
Claude Opus 5 (Adaptive Reasoning, Xhigh Effort) leads GPT-5.4 (xhigh) by 5.9 points on coding.
Top-pick rationale
GPT-5.4 (xhigh) wins 8 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.
GPT-5.4 (xhigh)
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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Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)
Anthropic
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 | Top Pick Op GPT-5.4 (xhigh) | An Claude Opus 5 (Adaptive Reasoning, Xhigh Effort) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $2.50/1M | $5.00/1M |
| Output Cost | $15.00/1M | $25.00/1M |
| Blended (3:1) | $5.63/1M | $10.00/1M |
| Specifications | ||
| Organization | OpenAI | Anthropic |
| Release Date | Mar 5, 2026 | Jul 24, 2026 |
| Performance & Speed | ||
| Throughput | — | 51.5 tok/s |
| TTFT | — | 17445ms |
| Latency | — | 17445ms |
| Composite Indices | ||
| Value Score | 100.0 | 62.7 |
| Reasoning Score | 62.9 | 70.2 |
| Intelligence | 53.1 | 62.5 |
| Coding | 71.1 | 77.0 |
| Standard Benchmarks | ||
| GPQA | 92.0% | 93.7% |
| HLE | 43.7% | 54.4% |
| SciCode | 56.6% | 55.0% |
| LCR | 77.7% | 76.3% |
| IFBench | 73.9% | — |
| TAU-bench v2 | 87.1% | — |
| TerminalBench Hard | 57.6% | — |
Key Takeaways
GPT-5.4 (xhigh) offers the best value at $2.50/1M,making it ideal for high-volume applications and cost-conscious projects.
Claude Opus 5 (Adaptive Reasoning, Xhigh Effort) has the strongest reasoning profile with a 70.2 reasoning score,combining the available reasoning-heavy benchmarks.
Claude Opus 5 (Adaptive Reasoning, Xhigh Effort) reaches a 77.0 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-5.4 (xhigh)
- Cost-sensitive applications
- High-volume processing
Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
