Is GPT-Realtime-1.5 or GPT-3.5 Turbo Instruct cheaper?

GPT-3.5 Turbo Instruct is cheaper on output tokens ($2.00 vs $16.00 per 1M).

Which has the larger context window, GPT-Realtime-1.5 or GPT-3.5 Turbo Instruct?

GPT-3.5 Turbo Instruct has the larger context window (8K tokens).

GPT-Realtime-1.5 vs GPT-3.5 Turbo Instruct

GPT-3.5 Turbo Instruct is cheaper on output tokens, while GPT-3.5 Turbo Instruct offers a larger context window. Choose GPT-Realtime-1.5 or GPT-3.5 Turbo Instruct based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-Realtime-1.5	GPT-3.5 Turbo Instruct
Provider	Vercel AI Gateway	Vercel AI Gateway
Input / 1M tokens	$4.00	$1.50
Output / 1M tokens	$16.00	$2.00
Context window	0	8K
Parameters	—	20B
Open weights	No	No
Released	Feb 2026	Sep 2023

GPT-Realtime-1.5 details →GPT-3.5 Turbo Instruct details →

FAQ

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