StepAudio 2.5 ASR vs GPT-4o
2026 Stored listed rates & illustrative token-cost comparison
GPT-4o
Deprecated
Deprecated endpoints may still be callable. Migrate before retirement.
📌 Executive Summary (TL;DR):StepAudio 2.5 ASR and GPT-4o represent distinct provider offerings. Review the granular token rate and context breakdown below to evaluate total cost of ownership.
Metric
StepAudio 2.5 ASR (StepFun)
GPT-4o (OpenAI)
Input listed rate
—
$2.50 / 1M Tokens
Output listed rate
—
$10.00 / 1M Tokens
Cached Input rate
—
$1.25 / 1M Tokens
Context Window
—
128K Tokens
Modality
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