Is stepfun-ai/Step-3.5-Flash or deepseek-ai/DeepSeek-R1 cheaper?

stepfun-ai/Step-3.5-Flash is cheaper on output tokens ($0.30 vs $2.18 per 1M).

Which has the larger context window, stepfun-ai/Step-3.5-Flash or deepseek-ai/DeepSeek-R1?

stepfun-ai/Step-3.5-Flash has the larger context window (262K tokens).

stepfun-ai/Step-3.5-Flash vs deepseek-ai/DeepSeek-R1

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

Spec	stepfun-ai/Step-3.5-Flash	deepseek-ai/DeepSeek-R1
Provider	SiliconFlow	SiliconFlow
Input / 1M tokens	$0.10	$0.50
Output / 1M tokens	$0.30	$2.18
Context window	262K	164K
Parameters	—	671B
Open weights	No	No
Released	Feb 2026	May 2025

stepfun-ai/Step-3.5-Flash details →deepseek-ai/DeepSeek-R1 details →

FAQ

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