GPT-5 nano vs Claude 4.5 Sonnet (thinking)
Detailed comparison of capabilities, features, and performance.
Feature
GPT-5 nano
Claude 4.5 Sonnet (thinking)
Model Image
AI Lab
OpenAI
Anthropic
Context Size
272,000 tokens
1,000,000 tokens
Max Output Size
128,000 tokens
200,000 tokens
Frontier Model
No
Yes
Vision Support
Yes
Yes
Description
The fastest, most cost-efficient version of GPT-5, great for summarization and classification tasks.
The latest Claude 4.5 Sonnet model from Anthropic with maximum reasoning enabled, 200k reasoning tokens in 1M context.
Learn more about GPT-5 nano
View detailed specifications and capabilities
View model details →Learn more about Claude 4.5 Sonnet (thinking)
View detailed specifications and capabilities
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