OpenCraftstepfun · chat model
Try Step 3.5 Flash online
stepfun/step-3.5-flashAdded to OpenRouter: 29 Jan 2026
Tracking since: · Specs updated:
Use Step 3.5 Flash in your browser. Explore pricing and capabilities below, or start a chat in OpenCraft.
Input price$0.10per M tokenscheaper than 79% of chat models
Output price$0.30per M tokenscheaper than 82% of chat models
Cache read—per M tokens
Context window256Ktokensof the largest window in the catalog (10M)
Step 3.5 Flash pricing: what a turn costs
Estimates from the published token rates above — real turns vary with tool calls and transcript length.
- Quick answer2K tokens in, 600 out$0.0004
- 10-slide deck build60K tokens in, 9K out$0.0087
- 150-page PDF read200K tokens in, 4K out$0.021
Specs and listed prices from OpenRouter. Actual usage cost depends on the serving provider.
How to use Step 3.5 Flash
- Select “Try Step 3.5 Flash online” to open OpenCraft with this model selected.
- Sign in or create an account if prompted.
- Type a question or describe a task, then send your message.
To compare answers, start a separate chat with another model and use the same prompt.
Step 3.5 Flash capabilities
tool-usereasoning
text in → text out
Create with OpenCraft
See example outputs and find a workflow for your next project.