Step 3.7 Flash (Stepfun): live API pricing, context window and the best open-source alternatives, tracked daily by olud.ai.
Prices update automatically — checked hourly against provider list prices.
Independent benchmark scores for Step 3.7 Flash, measured by Artificial Analysis. Higher is better.
Step 3.7 Flash is an open-weight AI model by Stepfun. You can download and self-host it for free; the prices below are hosted-API list prices, tracked hourly, for when you prefer convenience over self-hosting.
Step 3.7 Flash is an AI language model from Stepfun. It is open-weight: you can download it and run it on your own hardware, for free. It scores 30.3 on the Artificial Analysis intelligence index.
The weights are free and open — you can self-host Step 3.7 Flash and pay nothing per token. If you prefer a hosted API, list prices are $0.2 per million input tokens and $1.15 per million output tokens.
Independent benchmarks from Artificial Analysis give it GPQA 80.9%, Humanity's Last Exam 19.9%, Long Context Reasoning 63.7%, SciCode 40%, IFBench 67.3%, τ²-Bench 98.5%, τ-Bench Banking 11.3%, Terminal-Bench 39.3%, Terminal-Bench Hard 35.6%. It is particularly used for code generation.
It generates about 403.2 tokens per second, with a median 0.74s delay before the first token. Measured independently by Artificial Analysis.
Yes. Step 3.7 Flash has open weights, so you can download it and run it on your own GPU or server with tools like Ollama, vLLM or llama.cpp — with no per-token cost.