Is Baidu Ernie 4.5 21B A3B Thinking or OpenAI GPT-5 Nano cheaper?

Baidu Ernie 4.5 21B A3B Thinking is cheaper on output tokens ($0.28 vs $0.40 per 1M).

Which has the larger context window, Baidu Ernie 4.5 21B A3B Thinking or OpenAI GPT-5 Nano?

OpenAI GPT-5 Nano has the larger context window (400K tokens).

Baidu Ernie 4.5 21B A3B Thinking vs OpenAI GPT-5 Nano

Baidu Ernie 4.5 21B A3B Thinking is cheaper on output tokens, while OpenAI GPT-5 Nano offers a larger context window. Choose Baidu Ernie 4.5 21B A3B Thinking or OpenAI GPT-5 Nano based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Baidu Ernie 4.5 21B A3B Thinking	OpenAI GPT-5 Nano
Provider	Helicone	Helicone
Input / 1M tokens	$0.07	$0.05
Output / 1M tokens	$0.28	$0.40
Context window	128K	400K
Parameters	—	—
Open weights	No	No
Released	Mar 2025	Jan 2025

Baidu Ernie 4.5 21B A3B Thinking details →OpenAI GPT-5 Nano details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.