GPT-5.5 vs Claude Sonnet 5.5
Compare GPT-5.5 vs Claude Sonnet 5.5 API pricing, token costs, context windows, and latency. See which model is cheaper and better for your stack.
GPT-5.5 charges $5.00/1M input and $30.00/1M output tokens, compared to Claude Sonnet 5.5 at $2.00/1M input and $10.00/1M output. Claude Sonnet 5.5 is 2.5x cheaper on input tokens. In reasoning benchmarks, Claude Sonnet 5.5 holds the higher AA Intelligence Index rating. For latency-critical streaming, GPT-5.5 delivers 79 t/s (39.0s TTFT) while Claude Sonnet 5.5 provides 156 t/s (247.0s TTFT).
Full Metric & Specification Comparison
| Metric | GPT-5.5 | Claude Sonnet 5.5 | Advantage |
|---|---|---|---|
| Provider | OpenAI | Anthropic | - |
| Input Token Cost (1M) | $5.000 | $2.000 | Claude Sonnet 5.5 |
| Output Token Cost (1M) | $30.000 | $10.000 | Claude Sonnet 5.5 |
| Context Window | 922k tokens | 1,000k tokens | Claude Sonnet 5.5 |
| AA Intelligence Index | Unrated | 55/100 | Unrated |
| Streaming Latency | Moderate | Fast | - |
Key Architectural Takeaways
- Input Token Cost: GPT-5.5 is $5.00/1M vs Claude Sonnet 5.5 at $2.00/1M
- Output Token Cost: GPT-5.5 is $30.00/1M vs Claude Sonnet 5.5 at $10.00/1M
- Context Window: GPT-5.5 supports 922k tokens vs Claude Sonnet 5.5 with 1,000k tokens
- Benchmark Intelligence Rating: not rated for one or both models
- Inference Latency: GPT-5.5 is rated Moderate vs Claude Sonnet 5.5 rated Fast
Calculate Your Team's Exact Bill Difference
Drag the sliders below to see real-time cost divergences based on your daily token consumption.
Deploying Claude Sonnet 5.5 over GPT-5.5 saves $195.00/mo ($2340/yr) at this volume.
Frequently Asked Questions
Is GPT-5.5 cheaper than Claude Sonnet 5.5?
Claude Sonnet 5.5 is significantly more economical, charging $2.00/1M input compared to $5.00/1M for GPT-5.5.
Which model should I choose for production?
If your primary constraint is API cost and high query throughput, choose Claude Sonnet 5.5. If you require peak reasoning accuracy and complex tool use, Claude Sonnet 5.5 is recommended.
How does context window compare between GPT-5.5 and Claude Sonnet 5.5?
Claude Sonnet 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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