GPT-5.5 pro
Specs & Pricing
API pricing per 1M tokens and core technical specificationsCost Calculator
Simulate estimated API usage cost based on your specific traffic and context sizeSimulation Results
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Alternative Models
Models with comparable benchmark score and pricing tier| Model | Provider | Context Window | Max Output | Training Cutoff | Input / 1M | Cache Price / 1M | Output / 1M | Benchmark | Speed | Total |
|---|---|---|---|---|---|---|---|---|---|---|
Anthropic👑 | 1M | 128K | 2026-06 | $10.00 | $0.25 | $50.00 | 97.5 | Slow | $0.2627 | |
OpenAI👑 | 1M | 128K | 2025-08 | $30.00 | - | $180.00 | 96 | Slow | $1.14 | |
OpenAI | 400K | 128K | 2025-08 | $21.00 | - | $168.00 | 92.5 | Slow | $0.9240 | |
OpenAI | 400K | 272K | 2024-09 | $15.00 | - | $120.00 | 92 | Slow | $0.6600 | |
OpenAI | 200K | 100K | 2024-06 | $20.00 | - | $80.00 | 78.5 | Very Slow | $0.64 |
Provider
Benchmark
97.5Speed
Slow
Training Cutoff
2026-06
Context Window
1M
Max Output
128K
Input / 1M
$10.00
Cache Price / 1M
$0.25
Output / 1M
$50.00
Provider
Benchmark
96Speed
Slow
Training Cutoff
2025-08
Context Window
1M
Max Output
128K
Input / 1M
$30.00
Cache Price / 1M
-
Output / 1M
$180.00
Provider
Benchmark
92.5Speed
Slow
Training Cutoff
2025-08
Context Window
400K
Max Output
128K
Input / 1M
$21.00
Cache Price / 1M
-
Output / 1M
$168.00
Provider
Benchmark
92Speed
Slow
Training Cutoff
2024-09
Context Window
400K
Max Output
272K
Input / 1M
$15.00
Cache Price / 1M
-
Output / 1M
$120.00
Provider
Benchmark
78.5Speed
Very Slow
Training Cutoff
2024-06
Context Window
200K
Max Output
100K
Input / 1M
$20.00
Cache Price / 1M
-
Output / 1M
$80.00
All AI Models Pricing & Cost Simulator
Compare cutting-edge models from OpenAI, Anthropic, Google, and DeepSeek. Accurately simulate real-world API costs with prompt caching and custom context length.
GPT-5.5 pro Frequently Asked Questions (FAQ)
Key insights into GPT-5.5 pro API pricing, context capacity, caching savings, and performance benchmarks
Q. What is the API pricing for GPT-5.5 pro? How much does it cost per 1M tokens?＋
GPT-5.5 pro (OpenAI) is priced at $30.0000 per 1 million input tokens and $180.0000 per 1 million output tokens. The output rate is approximately 6.0x higher than the input rate. You can simulate your exact monthly API expenses tailored to your request volume and token length using the calculator above.
Q. What are the context window and maximum output limits of GPT-5.5 pro?＋
GPT-5.5 pro features a 1M context window and a maximum output limit of 128K tokens per request. This massive 1M+ context capacity allows you to process extensive document libraries or entire codebases in a single prompt.
Q. What are the best practices for optimizing API costs with GPT-5.5 pro?＋
Because output tokens ($180.0000/1M) cost significantly more than inputs, always configure a strict max_tokens ceiling and employ structured output schemas. Additionally, pairing GPT-5.5 pro with lightweight models for routine tasks via multi-LLM routing can substantially lower total infrastructure spend.
Q. What is the benchmark score (96.5) and performance profile of GPT-5.5 pro?＋
GPT-5.5 pro achieves an overall benchmark score of 96.5/100 with a "Slow" speed rating. It serves as a premier flagship model suited for complex reasoning, autonomous agents, and advanced coding.
Q. Which alternative models are comparable to GPT-5.5 pro?＋
Key alternatives in similar price-to-performance tiers include Claude Fable 5.1, GPT-5.4 pro, GPT-5.2 pro. We recommend comparing them based on your latency targets, context window needs, and prompt caching benefits using the full comparison tool on this site.