by Stepfun
StepFun: Step 3.7 Flash.
multimodal
open weights
256K ctx
Cheapest input
$0.2/M
on DeepInfra
Cheapest output
$1.15/M
on DeepInfra
Hosted equiv.
~$0.41/hr
@ 100 tok/s on DeepInfra
Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B p
Where to use it
Cheapest hosted endpoints.
FAQ
Frequently asked.
How do I run StepFun: Step 3.7 Flash?
StepFun: Step 3.7 Flash is open-weight, so you can self-host on rented GPUs. See the Run It Yourself tab for GPU configurations + cost estimates, or use one of the hosted inference providers listed on this page.
Where can I access StepFun: Step 3.7 Flash?
StepFun: Step 3.7 Flash is available via DeepInfra, OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run StepFun: Step 3.7 Flash?
API pricing starts at $0.2/M input tokens and $1.15/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is StepFun: Step 3.7 Flash open-source or proprietary?
StepFun: Step 3.7 Flash is open-weight under the license. You can download and self-host it.
API pricing
Per provider
What it costs per month across providers.
Estimate your monthly bill for StepFun: Step 3.7 Flash across every host that publishes per-token pricing. Slide your token volumes; the chart + table re-rank cheapest-first.
Cheapest
$4.3
OpenRouter
$/M input
$0.2
per million tokens
$/M output
$1.15
per million tokens
Providers
2
with priced rows
Monthly bill
Cheapest provider on the left.
Total monthly cost — input + output tokens combined.
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Bill breakdown.
Full calculator
Want to compare token volumes across other models too?
Open the standalone API pricing tool →
Context window
How much it can remember.
256K tokens
≈ 192,000 English words
4K
32K
128K
1M
Capabilities
What it can do.
·
Vision input
·
Audio input
·
Video input
·
Function calling
·
Tool use
·
JSON mode
✓
Streaming
·
Fine-tuning