Updated September 28, 2026 · DeployCue Editorial Team
StepFun (Jieyue Xingchen) vs Substrate
Compare StepFun (Jieyue Xingchen) and Substrate using recorded catalog facts and pricing.
StepFun (Jieyue Xingchen) vs Substrate: the differences
| Fact | StepFun (Jieyue Xingchen) | Substrate |
|---|---|---|
| Input price from | CN¥0.70 to CN¥7 | $0.10 to $0.20 |
| Output price from | CN¥2.10 to CN¥20 | $0.50 to $0.75 |
| Models offered | Step 5 preview, Step 3.7 flash, Step 3.5 flash, Step 3.5 flash 2603, Step 1o turbo vision, Stepaudio 3 realtime preview, Stepaudio 3 chat preview, Stepaudio 2.5 realtime, Stepaudio 2.5 chat, Step 1o audio, Step audio 2, Step audio r1.5, Stepaudio 3 tts, Stepaudio 2.5 tts, Step tts 2, Step tts mini, Stepaudio 3 asr max, Stepaudio 2.5 asr, Step 2x large, Step image edit 2 | GPT 6 Luna, GLM 5.3 Flash, GPT 6 Sol, Opus 5.5, DeepSeek V4.1 Flash, GPT 6 Astra, Fable 5.1, Grok 4.6, Kimi K3, Sonnet 5, Gemini 3.1 Pro |
| Largest context window | 1,000,000 | 1,100,000Higher |
| Free credits | Not confirmed | 14-day free trial; $10/mo AI credits on Basic |
| OpenAI-compatible API | Yes | Not confirmed |
Key differences
- Models offered: only StepFun (Jieyue Xingchen) offers Step 5 preview, Step 3.7 flash, Step 3.5 flash.
- Models offered: only Substrate offers GPT 6 Luna, GLM 5.3 Flash, GPT 6 Sol.
- Largest context window is higher at Substrate: 1,100,000 vs 1,000,000.
- Support channels: only Substrate offers Help centre.
Score breakdown
| Area | StepFun (Jieyue Xingchen) | Substrate |
|---|---|---|
| Cost | 8.90HigherInput fees run CNY 0.70 to CNY 7 and output fees CNY 2.10 to CNY 20, ranked 50 of 71 on entry price. | 8.80Input fees of $0.10 to $0.20 and output fees of $0.50 to $0.75 land mid-field, near the category medians of €0.08 and €0.23. |
| Offer | 8.90Catalogue spans text, speech, vision and image editing, with 1,000,000 on step-5-preview and an OpenAI-compatible API. | 9.40HigherA context window of 1,100,000 plus a free trial and monthly AI credits on the Basic plan. |
| Trust | Not confirmed | 8.00 |
Area by area
StepFun (Jieyue Xingchen)
- Cost8.9
- Offer8.9
Substrate
- Cost8.8
- Offer9.4
- StepFun (Jieyue Xingchen) and Substrate tie on cost at 8.9.
- Substrate leads on offer by 0.5 points (9.4 vs 8.9).
Every fact side by side
| Fact | StepFun (Jieyue Xingchen) | Substrate |
|---|---|---|
| Legal entity | Shanghai StepFun Intelligent Technology Co., Ltd. | Zo Computer Company |
| Headquarters | China | United States |
| Founded | Not confirmed | 2025 |
| Support channels | Email, Community | Email, Help centre, CommunityCovers more |
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