Is Claude Opus 4.8 Fast or Claude Opus 4.5 cheaper?

Claude Opus 4.5 is cheaper on output tokens ($30.00 vs $60.00 per 1M).

Which has the larger context window, Claude Opus 4.8 Fast or Claude Opus 4.5?

Claude Opus 4.8 Fast has the larger context window (1M tokens).

Claude Opus 4.8 Fast vs Claude Opus 4.5

Claude Opus 4.5 is cheaper on output tokens, while Claude Opus 4.8 Fast offers a larger context window. Choose Claude Opus 4.8 Fast or Claude Opus 4.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Claude Opus 4.8 Fast	Claude Opus 4.5
Provider	Venice AI	Venice AI
Input / 1M tokens	$12.00	$6.00
Output / 1M tokens	$60.00	$30.00
Context window	1M	198K
Parameters	—	—
Open weights	No	No
Released	May 2026	Dec 2025

Claude Opus 4.8 Fast 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.