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Claude Mythos 5.1 Anthropic GPT-5.5 OpenAI Legacy
Input $10.00 $5.00
Output $50.00 $30.00
Blended $20.00 $11.25
Context window 1M 1.05M
Max output 128k 128k
Output speed No data 80.9
Quality No data 61.2
Reasoning No data 69.7
Coding No data 69.2
Value No data 1.3
Vision ✓ ✓
Reasoning ✓ ✓
Tool calling ✓ ✓
Structured output ✓ ✓
Prompt caching ✓ ✓
Batch API ✓ ✓
Licence Proprietary Proprietary
API model id claude-mythos-5-1 gpt-5.5

At a glance

Input price, per million tokens
  1. Claude Mythos 5.1Anthropic$10.00
  2. GPT-5.5OpenAI$5.00
Output price, per million tokens
  1. Claude Mythos 5.1Anthropic$50.00
  2. GPT-5.5OpenAI$30.00
Context window
  1. Claude Mythos 5.1Anthropic1M
  2. GPT-5.5OpenAI1.05M

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