Is Step 3.5 Flash or Kimi K2.5 cheaper?

Step 3.5 Flash is cheaper on output tokens ($0.30 vs $3.02 per 1M).

Which has the larger context window, Step 3.5 Flash or Kimi K2.5?

Kimi K2.5 has the larger context window (262K tokens).

Step 3.5 Flash vs Kimi K2.5

Step 3.5 Flash is cheaper on output tokens, while Kimi K2.5 offers a larger context window. Choose Step 3.5 Flash or Kimi K2.5 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Step 3.5 Flash	Kimi K2.5
Provider	ZenMux	ZenMux
Input / 1M tokens	$0.10	$0.58
Output / 1M tokens	$0.30	$3.02
Context window	256K	262K
Parameters	—	1T
Open weights	No	No
Released	Feb 2026	Jan 2026

Step 3.5 Flash details →Kimi K2.5 details →

FAQ

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