Claude Sonnet 5.5 vs Step 5 Preview Pricing Comparison

Head-to-head token pricing, context window limits, and blended inference cost comparison between Claude Sonnet 5.5 (Anthropic) and Step 5 Preview (StepFun).

Direct Answer Summary (3:1 Blended Cost)

Claude Sonnet 5.5 costs 2.8x more than Step 5 Preview on a 3:1 blended token workload. Claude Sonnet 5.5 has a context window of 1000k tokens, while Step 5 Preview provides 1000k tokens.

Anthropic

Claude Sonnet 5.5

Input / 1M
$2.0000
Output / 1M
$10.0000
3:1 Blended / 1M
$4.0000
Context Window
1000k tokens
StepFun

Step 5 Preview

Input / 1M
$1.0000
Output / 1M
$2.7000
3:1 Blended / 1M
$1.4250
Context Window
1000k tokens
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