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GPT-5.5 Pro OpenAI Legacy GPT-6 Astra OpenAI
Input $30.00 $10.00
Output $180.00 $50.00
Blended $67.50 $20.00
Context window 1.05M 1.05M
Max output 128k 128k
Output speed No data 56.7
Quality No data 66.6
Reasoning No data 75.4
Coding No data 56.5
Value No data 0.8
Vision ✓ ✓
Reasoning ✓ ✓
Tool calling ✓ ✓
Structured output ✓ ✓
Prompt caching − ✓
Batch API ✓ ✓
Licence Proprietary Proprietary
API model id gpt-5.5-pro gpt-6-astra

At a glance

Input price, per million tokens
  1. GPT-5.5 ProOpenAI$30.00
  2. GPT-6 AstraOpenAI$10.00
Output price, per million tokens
  1. GPT-5.5 ProOpenAI$180
  2. GPT-6 AstraOpenAI$50.00
Context window
  1. GPT-5.5 ProOpenAI1.05M
  2. GPT-6 AstraOpenAI1.05M

Popular comparisons

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Voice and realtime 17
Embeddings 3