GPT-5 vs Claude 4 Sonnet (thinking)

Detailed comparison of capabilities, features, and performance.

Feature
GPT-5
Claude 4 Sonnet (thinking)
Model Image
GPT-5
Claude 4 Sonnet (thinking)
AI Lab
OpenAI
Anthropic
Context Size
400,000 tokens
200,000 tokens
Max Output Size
128,000 tokens
64,000 tokens
Frontier Model
Yes
Yes
Vision Support
Yes
Yes
Description
OpenAI's flagship model for coding, reasoning, and agentic tasks across domains.
The latest Sonnet 4 model from Anthropic with high thinking mode

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