Is GPT-5.4 mini or OpenRouter: Fusion cheaper?

OpenRouter: Fusion is cheaper on output tokens ($-1,000,000.00 vs $4.50 per 1M).

Which has the larger context window, GPT-5.4 mini or OpenRouter: Fusion?

OpenRouter: Fusion has the larger context window (1M tokens).

GPT-5.4 mini vs OpenRouter: Fusion

OpenRouter: Fusion is cheaper on output tokens, while OpenRouter: Fusion offers a larger context window. Choose GPT-5.4 mini or OpenRouter: Fusion based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-5.4 mini	OpenRouter: Fusion
Provider	OpenRouter	OpenRouter
Input / 1M tokens	$0.75	$-1,000,000.00
Output / 1M tokens	$4.50	$-1,000,000.00
Context window	400K	1M
Parameters	—	—
Open weights	No	—
Released	Mar 2026	—

GPT-5.4 mini details →OpenRouter: Fusion details →

FAQ

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