openai/gpt-5.5 vs gpt-4o:extended
Input price
$5.00
$6.00
Output price
$30.00
$18.00
Context window
1050K
128K
Throughput
157 tok/s
129 tok/s
Availability
97.0%
97.6%
Cost / task
$0.025
$0.021
Efficiency score
82
80
Estimated monthly cost by workload
Metric
OPENAI
GPT-4O-EXTENDE
Chat assistant
$5,100
$3,960
RAG / long context
$8,700
$8,820
Agent / tool use
$14,400
$10,800
Efficiency score: openai/gpt-5.5
Across price, speed and reliability, openai/gpt-5.5 offers the stronger overall balance for most workloads — but the right pick depends on your exact mix of input, output and latency needs.
Figures are illustrative demo data, not financial advice.
Frequently asked questions
Is openai/gpt-5.5 or gpt-4o:extended cheaper?+
openai/gpt-5.5 has the lower input price — $5.00 vs $6.00 per 1M tokens — so for most blended workloads it is the more cost-effective of the two. Figures are illustrative demo data.
Which should I choose, openai/gpt-5.5 or gpt-4o:extended?+
Across price, speed and reliability, openai/gpt-5.5 offers the stronger overall balance for most workloads — but the right pick depends on your exact mix of input, output and latency needs.