Model Comparison
GPT-4o (ChatGPT)
vs. Claude Opus 5.5 (Max, Default Fallback)
Comparing 2 AI models · 0 benchmarks · OpenAI, Anthropic
Recommended Pick
AnClaude Opus 5.5 (Max, Default Fallback)2 metric winsStrongest on: Reasoning, Intelligence
Lowest Price
Claude Opus 5.5 (Max, Default Fallback)
$4.00/1M input price
Best Reasoning
Claude Opus 5.5 (Max, Default Fallback)
57.6 reasoning score
Blends available reasoning benchmarks
Differences That Matter
Reasoning gap
Claude Opus 5.5 (Max, Default Fallback) leads GPT-4o (ChatGPT) by 50.4 points on reasoning.
Top-pick rationale
Claude Opus 5.5 (Max, Default Fallback) wins 2 measurable categories, including Reasoning, Intelligence.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GPT-4o (ChatGPT)
OpenAI
TTFT
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Time
—
tok/s
—
Tokens
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Cost
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Claude Opus 5.5 (Max, Default Fallback)
Anthropic
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Secure AI Chat made in Europe
Use open-weight models like DeepSeek, Qwen and Kimi in one app.
EU-hosted open models, one API
Servers in Germany & Finland. Operated by a German company under the GDPR, DPA available, ISO 27001-certified data centres.
Full Comparison
| Metric | Op GPT-4o (ChatGPT) | Top Pick An Claude Opus 5.5 (Max, Default Fallback) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | — | $4.00/1M |
| Output Cost | — | $20.00/1M |
| Blended (3:1) | — | $8.00/1M |
| Specifications | ||
| Organization | OpenAI | Anthropic |
| Release Date | Feb 15, 2025 | Sep 22, 2026 |
| Performance & Speed | ||
| Throughput | — | 98.3 tok/s |
| TTFT | — | 726850ms |
| Latency | — | 726850ms |
| Composite Indices | ||
| Value Score | — | 100.0 |
| Reasoning Score | 7.2 | 57.6 |
| Intelligence | 7.2 | 57.6 |
Key Takeaways
Claude Opus 5.5 (Max, Default Fallback) offers the best value at $4.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Claude Opus 5.5 (Max, Default Fallback) has the strongest reasoning profile with a 57.6 reasoning score,combining the available reasoning-heavy benchmarks.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
GPT-4o (ChatGPT)
- General-purpose AI
- Versatile applications
Claude Opus 5.5 (Max, Default Fallback)
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
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