OpenAI: GPT-5.1 vs Anthropic: Claude Opus 4.6

Compare these two models side-by-side to help you make the best choice for your needs

OpenAI: GPT-5.1

Premium

Description

GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...

Strengths

•Multimodal understanding with text and image support
•Large context window (400k tokens)

Best For

Image and document understanding

Anthropic: Claude Opus 4.6

Premium

Description

Opus 4.6 is Anthropic’s strongest model for coding and long-running professional tasks. It is built for agents that operate across entire workflows rather than single prompts, making it especially effective...

Strengths

•Multimodal understanding with text and image support
•Large context window (1000k tokens)

Best For

Image and document understanding

Feature	OpenAI: GPT-5.1	Anthropic: Claude Opus 4.6
Provider	OpenRouter	OpenRouter
Context Length	`400,000 tokens`	`1,000,000 tokens`
Input Price	`$1.25/M`	`$5.00/M`
Output Price	`$10.00/M`	`$25.00/M`
Vision Support	Yes	Yes
Higher cost	Yes	Yes
Capabilities	TextVision	TextVision