Capabilities
7-day heat trend
−10.4%Pricing breakdown
Typical 3:1 output-to-input mix, per 1M tokens
Estimated monthly cost by workload
Market position
- Cheaper than 22% of tracked models
- Faster than 99% of tracked models
- Efficiency rank: #94 of 1105
Best suited for
General-purpose text generation, chat, summarization and content workloads where broad capability and low cost matter most.
About step-3.5
Step 3.5 is a StepFun flagship chat model for long-context reasoning and coding tasks.
step-3.5 is a Text model from StepFun (CN). HotON.ai tracks it at $0.30 per 1M input tokens and $1.20 per 1M output tokens, with a 262K-token context window, ~173 tokens/sec throughput and 97.4% availability. Its composite efficiency score is 90/100 at an estimated $0.001 per successful task.
Compare step-3.5
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Frequently asked questions
How much does step-3.5 cost per 1M tokens?+
step-3.5 is tracked at $0.30 per 1M input tokens and $1.20 per 1M output tokens. A typical 3:1 output-to-input workload blends to roughly $0.97 per 1M tokens. Figures are illustrative demo data.
What is step-3.5 best for?+
General-purpose text generation, chat, summarization and content workloads where broad capability and low cost matter most.
How fast is step-3.5?+
step-3.5 delivers about 173 tokens/sec with 97.4% tracked availability, suitable for latency-sensitive, real-time applications.
Is step-3.5 cheaper than other AI models?+
Within the HotON.ai tracked set, step-3.5 is cheaper than 22% of models on input price and ranks #94 of 1105 by overall efficiency.
Related models
Pricing is real (via the TestKey catalog, updated daily). Quality (Arena Elo) is real where the model is ranked on LMArena. Speed, availability and efficiency are modeled estimates.