Step 3.5 Flash
by StepFunstepfun/step-3.5-flash
LLMCompare cannot run Step 3.5 Flash yet.No route to this model is configured on this site yet. Its prices and parameters are listed below for reference.
See the models that can be run nowStep 3.5 Flash at a glance
- Context length
- 262,144 tokens
- Maximum output
- 65,536 tokens
- Accepts
- Text
- Returns
- Text
- Features
- Tool calling
- Reasoning effort levels
- Not supported
- Released
- 29 Jan 2026
- Knowledge cutoff
- Not published
Model facts synced from the OpenRouter model list on 21 Oct 2026.
Step 3.5 Flash pricing by route
A route is the service LLMCompare calls to reach the model. Step 3.5 Flash has 1 route. Prices are in US dollars.
| Route | On LLMCompare | Inputper 1M tokens | Outputper 1M tokens | Price verified on | Source |
|---|---|---|---|---|---|
| OpenRouterDefault | Not configured | $0.10 | $0.30 | openrouter.ai/stepfun/step-3.5-flash |
The cost shown in an LLMCompare report is calculated from these prices as they were at the time of the run.
Cost calculator
Estimate what a batch of calls to Step 3.5 Flash costs. The starting numbers are examples. Change them to match your task.
- Cost per call
- $0.00025
- 1 credits
- Cost of 100 calls
- $0.025
- 100 credits
Calculated from the OpenRouter prices verified on 21 Oct 2026. Credits are the cost plus a 20% service fee, at $0.001 per credit, rounded up for each call, with a minimum of 1 per call. A real run is charged for the usage the provider reports.
Parameters you can set
These are the parameters LLMCompare can set when it calls the model through OpenRouter.
| Parameter | Type | Range or options | Default |
|---|---|---|---|
temperature | Number | 0 to 2in steps of 0.1 | Provider default |
top_p | Number | 0 to 1in steps of 0.05 | Provider default |
max_tokens | Integer | 1 to 65,536 | Provider default |
About Step 3.5 Flash
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
Description as published for this model. LLMCompare has not edited it.
Models to compare with Step 3.5 Flash
Text models from the same provider and models at the nearest price. The order is not a ranking.
| Add to comparison | Model | Context | Max output | Input priceper 1M tokens | Output priceper 1M tokens | Features | Released | On LLMCompare |
|---|---|---|---|---|---|---|---|---|
Step 3.7 FlashStepFunstepfun/step-3.7-flash | 262k | 230k | $0.20 | $1.15 | ReasoningJSONToolsCacheVision | No route yet | ||
Step 5 PreviewStepFunstepfun/step-5-preview | 1.05M | 64k | $1.00 | $2.70 | ReasoningJSONToolsCacheVision | No route yet | ||
Nemotron 3.5 Content SafetyNVIDIAnvidia/nemotron-3.5-content-safety | 131k | 118k | $0.20 | $0.20 | Vision | No route yet | ||
Ministral 3 14B 2512Mistralmistralai/ministral-14b-2512 | 262k | 210k | $0.20 | $0.20 | JSONToolsCacheVision | No route yet | ||
Voxtral Small 24B 2507Mistralmistralai/voxtral-small-24b-2507 | 32.8k | 26.2k | $0.10 | $0.30 | JSONToolsCache | No route yet | ||
Llama 4 ScoutMetameta-llama/llama-4-scout | 1.31M | 16.4k | $0.10 | $0.30 | JSONToolsVision | No route yet |
Questions about Step 3.5 Flash
- How much does Step 3.5 Flash cost?
- On the OpenRouter route, Step 3.5 Flash costs $0.10 per 1 million input tokens and $0.30 per 1 million output tokens, in US dollars. LLMCompare verified this price on 21 Oct 2026.
- What is the context length of Step 3.5 Flash?
- Step 3.5 Flash has a context length of 262,144 tokens and returns up to 65,536 output tokens in one call.
- What inputs does Step 3.5 Flash accept?
- Step 3.5 Flash accepts these inputs: Text. Step 3.5 Flash returns: Text.
- Can I test Step 3.5 Flash on my own data?
- Not yet. LLMCompare lists the prices and parameters of Step 3.5 Flash, but no route to Step 3.5 Flash is configured on LLMCompare, so it cannot be selected for an evaluation.