Is Grok 4.20 or Claude Opus 4.5 cheaper?

Grok 4.20 is cheaper on output tokens ($2.83 vs $30.00 per 1M).

Which has the larger context window, Grok 4.20 or Claude Opus 4.5?

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

Grok 4.20 vs Claude Opus 4.5

Grok 4.20 is cheaper on output tokens, while Grok 4.20 offers a larger context window. Choose Grok 4.20 or Claude Opus 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Grok 4.20	Claude Opus 4.5
Provider	Venice AI	Venice AI
Input / 1M tokens	$1.42	$6.00
Output / 1M tokens	$2.83	$30.00
Context window	2M	198K
Parameters	500B	—
Open weights	No	No
Released	Mar 2026	Dec 2025

Grok 4.20 details →Claude Opus 4.5 details →

FAQ

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