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Claude Mythos 5.1 Anthropic GPT-5 Pro OpenAI Legacy
Input $10.00 $15.00
Output $50.00 $120.00
Blended $20.00 $41.25
Context window 1M 400k
Max output 128k 272k
Vision ✓ ✓
Reasoning ✓ ✓
Tool calling ✓ ✓
Structured output ✓ ✓
Prompt caching ✓ −
Batch API ✓ ✓
Licence Proprietary Proprietary
API model id claude-mythos-5-1 gpt-5-pro

At a glance

Input price, per million tokens
  1. Claude Mythos 5.1Anthropic$10.00
  2. GPT-5 ProOpenAI$15.00
Output price, per million tokens
  1. Claude Mythos 5.1Anthropic$50.00
  2. GPT-5 ProOpenAI$120
Context window
  1. Claude Mythos 5.1Anthropic1M
  2. GPT-5 ProOpenAI400k

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