Step 3.7 Flash
Pricing as of October 2026$0.200/1M input · $1.15/1M output · 262K context · StepFun
Step 3.7 Flash costs $0.200 per 1M input tokens and $1.15 per 1M output tokens from StepFun, with a 262K-token context window. A typical chat reply (1,500 tokens in, 400 out) costs $0.0008, or $7.60 per 10,000 requests. On that workload it is cheaper than 126 of the 167 other buyable models tracked here.
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What Step 3.7 Flash Costs Per Request
At $0.200 per 1M input and $1.15 per 1M output tokens, before caching or batch discounts.
| Workload | Input / output tokens | Per request | Per 10,000 requests |
|---|---|---|---|
| Chat reply | 1,500 / 400 | $0.0008 | $7.60 |
| RAG answer over retrieved docs | 8,000 / 600 | $0.0023 | $22.90 |
| Coding-agent step | 30,000 / 2,000 | $0.0083 | $83.00 |
Step 3.7 Flash vs Similarly Priced Models
Nearest buyable models by price, with the RAG answer above (8,000 in / 600 out) priced on each.
| Model | Input /1M | Output /1M | Context | RAG answer |
|---|---|---|---|---|
| Step 3.7 Flash StepFun | $0.200 | $1.15 | 262K | $0.0023 |
| Qwen3-Next-80B-A3B-Thinking Alibaba | $0.150 | $1.20 | 262K | $0.0019 |
| MiMo-V2.6-Pro Xiaomi | $0.435 | $0.870 | 1.0M | $0.0040 |
| GPT-5.6 Luna OpenAI | $0.200 | $1.20 | 1.1M | $0.0023 |
Alternatives to Step 3.7 Flash
Pricing Details
StepFunOpen-weight (Apache 2.0) multimodal MoE: 198B total / ~11B active, 196B language backbone + 1.8B ViT, 288 experts top-8. Cached input $0.04/1M. No surcharge for vision input or reasoning effort (low/medium/high dial). Native image + video, Python tool for hi-res image probing. AA Intelligence Index 43 (independent), ~382 tok/s, 0.94s TTFT. Vendor-reported: SWE-Bench Pro 56.3, Terminal-Bench 2.1 59.6, HR-Bench 4K 89.1. Advisor Mode claim: SWE-Bench Verified 76.3% at ~$0.19/task. HF stepfun-ai/Step-3.7-Flash. Also on OpenRouter and NVIDIA NIM (DeepInfra, Fireworks coming soon). Estimated tokens (different tokenizer). Max output unconfirmed.
Input / 1M tokens
$0.2
Output / 1M tokens
$1.15
Context Window
262K
Max Output
66K
Price History
No price change recorded since 2026-08-11, when this site started tracking this model; it launched on 2026-05-29.
Frequently Asked Questions
Common questions about Step 3.7 Flash pricing and usage
How much does Step 3.7 Flash cost?
Step 3.7 Flash costs $0.2 per 1 million input tokens and $1.15 per 1 million output tokens. This pricing is set by StepFun.
What tokenizer does Step 3.7 Flash use?
Step 3.7 Flash uses the cl100k_base tokenizer. This tokenizer has a vocabulary of ~100,000 tokens and is widely used across many models.
What is Step 3.7 Flash's context window?
Step 3.7 Flash supports a context window of 262K tokens (262,144 tokens). The maximum output length is 66K tokens.
How does Step 3.7 Flash compare to other models?
On an 8,000-token-in, 600-token-out RAG answer, Step 3.7 Flash costs $0.0023 per request. The nearest-priced alternatives cost: Qwen3-Next-80B-A3B-Thinking (Alibaba) $0.0019, MiMo-V2.6-Pro (Xiaomi) $0.0040, GPT-5.6 Luna (OpenAI) $0.0023. The table above lists their full rates and context windows.
How do I count tokens for Step 3.7 Flash?
Use the token counter at the top of this page or visit the homepage calculator. Paste your text and it will show the exact token count and cost for Step 3.7 Flash using the cl100k_base tokenizer.