Is Claude Sonnet 5 cheaper than GPT-5 nano?

GPT-5 nano is cheaper, at $0.15 per 1M input tokens versus $3.00.

Which has the larger context window, Claude Sonnet 5 or GPT-5 nano?

Claude Sonnet 5 has the larger context window at 400K tokens.

GPT-5 nano is cheaper on input ($0.15 vs $3.00 per 1M tokens), Claude Sonnet 5 has the larger context window (400K).

Spec	Claude Sonnet 5	GPT-5 nano
Provider	Anthropic	OpenAI
Modality	Text + Vision	Text
Context window	400Kbest	128K
Input / 1M	$3.00	$0.15best
Output / 1M	$15.00	$0.60best
Released	Feb 2026	Jan 2026
Best for	Chat / Assistant, Code generation, Image / Vision	High-volume / cheap, Chat / Assistant

Is Claude Sonnet 5 cheaper than GPT-5 nano?: GPT-5 nano is cheaper, at $0.15 per 1M input tokens versus $3.00.
Which has the larger context window, Claude Sonnet 5 or GPT-5 nano?: Claude Sonnet 5 has the larger context window at 400K tokens.