About
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
Related Models
Pricing
Input
$5.00
per 1M tokens
Output
$30.00
per 1M tokens
Blended
$11.25
per 1M tokens
Cheaper than 4% of models. Median price is $0.54/1M tokens.
Cost Calculator
Tokens per day1M
100K100M
Daily
$11.25
Monthly
$337.50
vs. Similar Models
Anthropic: Claude Opus 4.8Q:+0.9
$10.00-11%
Anthropic: Claude Opus 4.7Q:-1.3
$10.00-11%
GPT-5.5 (high)Q:-1.7
$11.250%
OpenAI: GPT-5.4Q:-3.4
$5.63-50%
Performance
82
tokens/sec
Faster than 41% of models
37.67
seconds
Faster than 3% of models
37.67
seconds
Faster than 12% of models
Market Median
94 tok/s
13% slower
Median TTFT
1.11s
3285% slower
Throughput/Dollar
7
tok/s per $/1M
Speed Comparison
Llama 3 Instruct 8B
82 tok/s-0%
DeepSeek V4 Pro (Reasoning, High Effort)
81 tok/s-0%
Llama 3.1 Instruct 405B
82 tok/s+1%
Context Window
1.1M
tokens
Larger than 97% of models
Max Output
128K
tokens
12% of context
Benchmarks
MMLU-ProNot evaluated
GPQA Diamond
93.5%
HLE
44.3%
LiveCodeBenchNot evaluated
SciCode
56.1%
TerminalBench Hard
60.6%
MATH-500Not evaluated
AIMENot evaluated
AIME 2025Not evaluated
IFBench
75.9%
Long Context Recall
74.3%
Tau2
93.9%
Market AverageTop Score