Is Step 2 (16K) or Step 3.5 Flash 2603 cheaper?

Step 3.5 Flash 2603 is cheaper on output tokens ($0.30 vs $16.44 per 1M).

Which has the larger context window, Step 2 (16K) or Step 3.5 Flash 2603?

Step 3.5 Flash 2603 has the larger context window (256K tokens).

Step 2 (16K) vs Step 3.5 Flash 2603

Step 3.5 Flash 2603 is cheaper on output tokens, while Step 3.5 Flash 2603 offers a larger context window. Choose Step 2 (16K) or Step 3.5 Flash 2603 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Step 2 (16K)	Step 3.5 Flash 2603
Provider	StepFun	StepFun
Input / 1M tokens	$5.21	$0.10
Output / 1M tokens	$16.44	$0.30
Context window	16K	256K
Parameters	—	—
Open weights	No	Yes
Released	Jan 2025	Apr 2026

Step 2 (16K) details →Step 3.5 Flash 2603 details →

FAQ

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