Is StepFun: Step 3.5 Flash or DeepSeek: R1 cheaper?

StepFun: Step 3.5 Flash is cheaper on output tokens ($0.30 vs $2.50 per 1M).

Which has the larger context window, StepFun: Step 3.5 Flash or DeepSeek: R1?

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

StepFun: Step 3.5 Flash vs DeepSeek: R1

StepFun: Step 3.5 Flash is cheaper on output tokens, while StepFun: Step 3.5 Flash offers a larger context window. Choose StepFun: Step 3.5 Flash or DeepSeek: R1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	StepFun: Step 3.5 Flash	DeepSeek: R1
Provider	Kilo Gateway	Kilo Gateway
Input / 1M tokens	$0.10	$0.70
Output / 1M tokens	$0.30	$2.50
Context window	256K	64K
Parameters	—	671B
Open weights	Yes	Yes
Released	Jan 2026	Jan 2025

StepFun: Step 3.5 Flash details →DeepSeek: R1 details →

FAQ

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