Is Step 3.5 Flash 2603 or Kimi K2.5 cheaper?

Step 3.5 Flash 2603 is cheaper on output tokens ($0.30 vs $2.42 per 1M).

Which has the larger context window, Step 3.5 Flash 2603 or Kimi K2.5?

Step 3.5 Flash 2603 has the larger context window (262K tokens).

Step 3.5 Flash 2603 vs Kimi K2.5

Step 3.5 Flash 2603 is cheaper on output tokens, while Step 3.5 Flash 2603 offers a larger context window. Choose Step 3.5 Flash 2603 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 2603	Kimi K2.5
Provider	routing.run	routing.run
Input / 1M tokens	$0.10	$0.46
Output / 1M tokens	$0.30	$2.42
Context window	262K	131K
Parameters	—	1T
Open weights	Yes	Yes
Released	Apr 2026	Jan 2026

Step 3.5 Flash 2603 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.