Step 3.7 Flash
$0.20 per 1M input tokens and $1.15 per 1M output tokens · 262K context · vision, tools, reasoning, JSON, open weights.
Prices checked Oct 21, 2026 · tracked by LLM Cost Index since Oct 21, 2026
What Step 3.7 Flash costs per month
Estimated monthly bill for typical workloads, using the cached-input price for repeated context. Try your own numbers in the cost calculator.
| Workload | Per month |
|---|---|
| Customer chatbot 1,000 conversations a day, 8 turns each | $134 |
| Document Q&A (RAG) 500 questions a day over retrieved documents | $25.18 |
| Coding / tool-using agent 200 tasks a day, long tool-heavy contexts | $56.40 |
| Content generation 30 long articles a day | $3.13 |
| Classification / extraction 100,000 short items a day | $232 |
Price history
We started tracking Step 3.7 Flash on Oct 21, 2026; the chart appears as soon as there is a second data point. See all recent price changes.
Where to run Step 3.7 Flash: 2 providers
Novita is the cheapest at $0.20 input / $1.15 output per 1M tokens. Uptime is the average over the last 30 days as reported by OpenRouter; see provider reliability.
Cheaper alternatives to Step 3.7 Flash
Models with the same tool calling, image input, structured output for at least 20% less (3:1 input/output mix), most capable first.
| Model | Input / 1M | Output / 1M | Context | Capabilities |
|---|---|---|---|---|
| Claude Haiku 5.5 Anthropic | $0.10 | $0.50 | 1M | visiontoolsreasoningJSON |
| GLM 5.3 Flash Z.ai | $0.041 | $0.12 | 1.05M | visiontoolsreasoningJSONopen weights |
| GPT-6 Luna OpenAI | $0.10 | $0.50 | 1.05M | visiontoolsreasoningJSON |
| MiMo-V2.6-Flash Xiaomi | $0.14 | $0.28 | 1.05M | visionaudiotoolsreasoningJSONopen weights |
| DeepSeek V4 Flash Vision Exp DeepSeek | $0.216 | $0.647 | 1.05M | visiontoolsreasoningJSONopen weights |
How to pay less for Step 3.7 Flash
For a customer chatbot (1,000 conversations a day, 8 turns each) that costs $169 a month at list price without caching:
| Option | Per month | You save |
|---|---|---|
| Move to Claude Haiku 5.5 (similar capabilities) | $58.56 | $110 (65%) |
| Use prompt caching (60% of input cached) | $134 | $34.56 (20%) |
Other workloads: cut-your-bill tool for Step 3.7 Flash.
Specifications
| Model ID | stepfun/step-3.7-flash |
| Input | text, image, video |
| Output | text |
| Tool calling | Yes |
| Structured output | Yes |
| Reasoning mode | Yes |
| Open weights | Yes — stepfun-ai/Step-3.7-Flash |
| Released | May 28, 2026 |
FAQ
- How much does Step 3.7 Flash cost?
- $0.20 per million input tokens and $1.15 per million output tokens; cached input costs $0.04 per million. Prices as of Oct 21, 2026.
- What is the context window of Step 3.7 Flash?
- 262K tokens, with up to 230K output tokens per response.
- Does Step 3.7 Flash support images, tools and structured output?
- Images as input: yes. Tool calling: yes. Structured (JSON) output: yes. Reasoning mode: yes.
- What are cheaper alternatives to Step 3.7 Flash?
- Models with the same key capabilities for at least 20% less include Claude Haiku 5.5 ($0.10 / $0.50), GLM 5.3 Flash ($0.041 / $0.12), GPT-6 Luna ($0.10 / $0.50).
More from Stepfun: all Stepfun models · how we collect prices