Is GPT-4o (2024-05-13) or GPT-5.5 Pro cheaper?

GPT-4o (2024-05-13) is cheaper on output tokens ($15.00 vs $180.00 per 1M).

Which has the larger context window, GPT-4o (2024-05-13) or GPT-5.5 Pro?

GPT-5.5 Pro has the larger context window (1.1M tokens).

GPT-4o (2024-05-13) vs GPT-5.5 Pro

GPT-4o (2024-05-13) is cheaper on output tokens, while GPT-5.5 Pro offers a larger context window. Choose GPT-4o (2024-05-13) or GPT-5.5 Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-4o (2024-05-13)	GPT-5.5 Pro
Provider	OrcaRouter	OrcaRouter
Input / 1M tokens	$5.00	$30.00
Output / 1M tokens	$15.00	$180.00
Context window	128K	1.1M
Parameters	—	—
Open weights	No	No
Released	May 2024	Apr 2026

GPT-4o (2024-05-13) details →GPT-5.5 Pro details →

FAQ

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