Common GPT 5.5 pricing misconception.

Many people have pointed out that ChatGPT 5.5 appears to be twice as expensive as 5.4 based on API pricing, which makes it look pricier than Opus 4.7. But the comparison is not that simple.

GPT 5.5 is significantly more token-efficient in practice, which can make it faster and reduce the total cost of completing a task. When you compare it directly to Opus 4.7, the image here shows that Claude Opus 4.7 is still much more expensive than GPT 5.5, around 5 to 10 times more expensive on ARC-AGI-2.

Anthropic also changed the tokenizer for Opus 4.7, which appears to increase token counts by about 1.35x. Combined with Anthropic’s already high API pricing, this makes Claude substantially more expensive in real world usage than a simple headline price comparison suggests.