Which has the larger context window, Anthropic: Claude Opus 4.5 or Anthropic: Claude Opus 4.1?

Both models offer a similar context window.

Anthropic: Claude Opus 4.5 vs Anthropic: Claude Opus 4.1

Q: Is Anthropic: Claude Opus 4.5 or Anthropic: Claude Opus 4.1 cheaper?

Anthropic: Claude Opus 4.5 is cheaper on output tokens ($25.00 vs $75.00 per 1M).

Anthropic: Claude Opus 4.5 is cheaper on output tokens. Choose Anthropic: Claude Opus 4.5 or Anthropic: Claude Opus 4.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Anthropic: Claude Opus 4.5	Anthropic: Claude Opus 4.1
Provider	Helicone	Helicone
Input / 1M tokens	$5.00	$15.00
Output / 1M tokens	$25.00	$75.00
Context window	200K	200K
Parameters	—	—
Open weights	No	No
Released	Nov 2025	Aug 2025

Anthropic: Claude Opus 4.5 details →Anthropic: Claude Opus 4.1 details →

FAQ

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