Is Grok 4.20 Beta Reasoning or GPT-3.5 Turbo Instruct cheaper?

GPT-3.5 Turbo Instruct is cheaper on output tokens ($2.00 vs $2.50 per 1M).

Which has the larger context window, Grok 4.20 Beta Reasoning or GPT-3.5 Turbo Instruct?

Grok 4.20 Beta Reasoning has the larger context window (2M tokens).

Grok 4.20 Beta Reasoning vs GPT-3.5 Turbo Instruct

GPT-3.5 Turbo Instruct is cheaper on output tokens, while Grok 4.20 Beta Reasoning offers a larger context window. Choose Grok 4.20 Beta Reasoning or GPT-3.5 Turbo Instruct based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Grok 4.20 Beta Reasoning	GPT-3.5 Turbo Instruct
Provider	Vercel AI Gateway	Vercel AI Gateway
Input / 1M tokens	$1.25	$1.50
Output / 1M tokens	$2.50	$2.00
Context window	2M	8K
Parameters	—	20B
Open weights	No	No
Released	Mar 2026	Sep 2023

Grok 4.20 Beta Reasoning 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.