Last refreshed 2026-05-29. Next refresh: weekly.
Why use Step 3.7 Flash on OpenRouter?
OpenRouter offers Step 3.7 Flash with pay-as-you-go pricing at $0.20/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare Step 3.7 Flash across 3 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: stepfun/step-3.7-flash-20260528stepfun/step-3.7-flash-20260528Request example
stepfun/step-3.7-flash-20260528.Gotchas
- Use provider model ID "stepfun/step-3.7-flash-20260528", not the LLMReference slug "step-3.7-flash".
Compare Step 3.7 Flash Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| StepFun | $0.20 | $1.15 |
| OpenRouter | $0.20 | $1.15 |
| NVIDIA NIM | — | — |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.20 |
| Output tokens | $1.15 |
| Image input | $1.00 |
| Video input | $1.00 |
Capabilities
About Step 3.7 Flash
Step 3.7 Flash is StepFun's open-weights multimodal Mixture-of-Experts model for agentic coding, tool use, long-context reasoning, image understanding, and video understanding. It combines a 196B-parameter language backbone with a 1.8B-parameter vision encoder, activates about 11B parameters per token, supports a 256K-token context window, and exposes low, medium, and high reasoning levels for speed/depth tradeoffs. StepFun reports leading open-model results on ClawEval-1.1, SimpleVQA with Search, and SWE-bench Pro at launch. Weights are available on Hugging Face under Apache 2.0.
FAQ
What does Step 3.7 Flash cost on OpenRouter?
On OpenRouter, Step 3.7 Flash costs $0.20 per 1M input tokens and $1.15 per 1M output tokens.
What is the context window for Step 3.7 Flash on OpenRouter?
Step 3.7 Flash supports a 256k token context window on OpenRouter.
How does OpenRouter compare to other Step 3.7 Flash providers?
Step 3.7 Flash is available from 3 providers. The cheapest input pricing is $0.20/1M tokens from StepFun.
What API model ID do I use for Step 3.7 Flash on OpenRouter?
Use the model ID stepfun/step-3.7-flash-20260528 when calling OpenRouter's API.
Who created Step 3.7 Flash?
Step 3.7 Flash was created by StepFun as part of the Step model family.
Is Step 3.7 Flash open source?
Step 3.7 Flash is open source according to the seed data.