Claude Opus 5.5 vs GPT-4o (Omni)
Compare Claude Opus 5.5 vs GPT-4o (Omni) API pricing, token costs, context windows, and latency. See which model is cheaper and better for your stack.
Claude Opus 5.5 charges $4.00/1M input and $20.00/1M output tokens, compared to GPT-4o (Omni) at $2.50/1M input and $10.00/1M output. GPT-4o (Omni) is 1.6x cheaper on input tokens. In reasoning benchmarks, Claude Opus 5.5 holds the higher AA Intelligence Index rating. For latency-critical streaming, throughput figures are not yet measured for at least one of these models.
Full Metric & Specification Comparison
| Metric | Claude Opus 5.5 | GPT-4o (Omni) | Advantage |
|---|---|---|---|
| Provider | Anthropic | OpenAI | - |
| Input Token Cost (1M) | $4.000 | $2.500 | GPT-4o (Omni) |
| Output Token Cost (1M) | $20.000 | $10.000 | GPT-4o (Omni) |
| Context Window | 1,000k tokens | 128k tokens | Claude Opus 5.5 |
| AA Intelligence Index | 59/100 | Unrated | Unrated |
| Streaming Latency | Fast | Unrated | - |
Key Architectural Takeaways
- Input Token Cost: Claude Opus 5.5 is $4.00/1M vs GPT-4o (Omni) at $2.50/1M
- Output Token Cost: Claude Opus 5.5 is $20.00/1M vs GPT-4o (Omni) at $10.00/1M
- Context Window: Claude Opus 5.5 supports 1,000k tokens vs GPT-4o (Omni) with 128k tokens
- Benchmark Intelligence Rating: not rated for one or both models
- Inference Latency: Claude Opus 5.5 is rated Fast vs GPT-4o (Omni) rated null
Calculate Your Team's Exact Bill Difference
Drag the sliders below to see real-time cost divergences based on your daily token consumption.
Deploying GPT-4o (Omni) over Claude Opus 5.5 saves $97.50/mo ($1170/yr) at this volume.
Frequently Asked Questions
Is Claude Opus 5.5 cheaper than GPT-4o (Omni)?
GPT-4o (Omni) is significantly more economical, charging $2.50/1M input compared to $4.00/1M for Claude Opus 5.5.
Which model should I choose for production?
If your primary constraint is API cost and high query throughput, choose GPT-4o (Omni). If you require peak reasoning accuracy and complex tool use, Claude Opus 5.5 is recommended.
How does context window compare between Claude Opus 5.5 and GPT-4o (Omni)?
Claude Opus 5.5 offers the larger context window (1,000k tokens), allowing you to pass significantly larger codebases or documents without chunking.
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