Model
Step 3.5 Flash
StepFun flash lane for quick multimodal reasoning and coding assistance
Compare providers (sorted by listed input price)
12 of 16 providers publish a price for Step 3.5 Flash. The cheapest full-context option is Vercel AI Gateway at $0.09/$0.3 per M — 4% below StepFun (China)'s own price.
Best price history
Daily lowest published price across live providers. A lower line is better for the buyer.
- Best input /M
- $0.09unchanged
- Best output /M
- $0.3unchanged
- Provider coverage
- 16
- 16 at the start · 24 snapshots
Published best prices are unchanged.
24 daily snapshots collected from Aug 21, 2026 through Sep 14, 2026. A price chart will appear after the first real move.
Price badge
https://www.vaanalytics.in/badge/stepfun/step-3.5-flash.svgLive SVG, regenerated on every hourly sync — paste it into a README to always show the current cheapest listed price. Updates when prices change; no build step needed on your side.
Recent changes
Changelog →- capabilityvia edenai · Sep 7, 2026
- name: Step 3.5 Flash → Step 3.5 Flash (Deep Infra)
- contextvia nano-gpt · Sep 3, 2026
- context: 256K → 262K tokens
- output: 256K → 66K tokens
- input: 256K → 262K tokens
Benchmarks
- Artificial Analysis Coding Index ↗(index)report ↗Marketplace31.6
- SciCode(percent correct)report ↗Marketplace40.4
- Terminal-Bench Hard ↗(success rate)report ↗Marketplace27.3
- SWE-Bench Verified ↗(resolved)report ↗Unclassified source74.4
Scores a lab published about its own model are claims, not measurements. Rankings elsewhere on this site use independently measured scores only.
Weights
Standard open-source terms. Commercial use without additional conditions. Weights download without an access request.
Derived from stepfun-ai/step-3.5-flash.
licence and gating from the Hugging Face model card ↗ — the card is authoritative, this is a summary
Prices are per million tokens (USD). “—” means the provider does not publicly list a price for this model. Data from models.dev; verify with the provider before purchasing.