Model Comparison
GPT-5.4 (Xhigh)
vs. Claude Sonnet 5.5 (Max, Default Fallback)
Comparing 2 AI models · 0 benchmarks · OpenAI, Anthropic
Recommended Pick
AnClaude Sonnet 5.5 (Max, Default Fallback)7 metric winsStrongest on: Value, Input price, Output price
Best Value
Claude Sonnet 5.5 (Max, Default Fallback)
100.0 value score
56.0 reasoning / $4.00/1M
Lowest Price
Claude Sonnet 5.5 (Max, Default Fallback)
$2.00/1M input price
Best Reasoning
Claude Sonnet 5.5 (Max, Default Fallback)
56.0 reasoning score
Blends available reasoning benchmarks
Best for Coding
GPT-5.4 (Xhigh)
71.1 coding index
Differences That Matter
Best value
Claude Sonnet 5.5 (Max, Default Fallback) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Claude Sonnet 5.5 (Max, Default Fallback) is 1.3x cheaper on input tokens than GPT-5.4 (Xhigh).
Speed gap
Claude Sonnet 5.5 (Max, Default Fallback) generates about 1.5x as many tokens per second as GPT-5.4 (Xhigh).
Reasoning gap
Claude Sonnet 5.5 (Max, Default Fallback) leads GPT-5.4 (Xhigh) by 17.0 points on reasoning.
Top-pick rationale
Claude Sonnet 5.5 (Max, Default Fallback) wins 7 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 Sonnet 5.5 (Max, Default Fallback)
Anthropic
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
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Full Comparison
| Metric | Op GPT-5.4 (Xhigh) | Top Pick An Claude Sonnet 5.5 (Max, Default Fallback) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $2.50/1M | $2.00/1M |
| Output Cost | $15.00/1M | $10.00/1M |
| Blended (3:1) | $5.63/1M | $4.00/1M |
| Specifications | ||
| Organization | OpenAI | Anthropic |
| Release Date | Mar 5, 2026 | Sep 28, 2026 |
| Performance & Speed | ||
| Throughput | 90.1 tok/s | 139.0 tok/s |
| TTFT | 192940ms | 428360ms |
| Latency | 192940ms | 428360ms |
| Composite Indices | ||
| Value Score | 49.5 | 100.0 |
| Reasoning Score | 39.0 | 56.0 |
| Intelligence | 39.0 | 56.0 |
| Coding | 71.1 | — |
Key Takeaways
Claude Sonnet 5.5 (Max, Default Fallback) offers the best value at $2.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Claude Sonnet 5.5 (Max, Default Fallback) has the strongest reasoning profile with a 56.0 reasoning score,combining the available reasoning-heavy benchmarks.
GPT-5.4 (Xhigh) reaches a 71.1 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
GPT-5.4 (Xhigh)
- Code generation
- Software development
Claude Sonnet 5.5 (Max, Default Fallback)
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
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