CN
StepFun
Website Models on Hugging Face
Tracked2models
Free now1models
Best free nowStep 3.7 Flash
FTI7–12
2 sources, 1 independent of the vendor: centre 9; the sources disagree widely, so shown as a band.
- Artificial Analysis · third party
- 21.2 Humanity's Last Exam: 48.1 · vendor
Free channels1
Events7
Models 1 free now · 1 not
| Model | FT Intelligence | Free on | Context | Images | Events |
|---|---|---|---|---|---|
| #40–57Step 3.7 FlashStepFun |
FTI7–122 sources, 1 independent of the vendor: centre 9; the sources disagree widely, so shown as a band.
|
256K | yes | 3 events | |
| Not free now · 1 tracked model with no free lane | |||||
| Step 5 PreviewStepFun |
FTI29–342 sources, 2 independent of the vendor: centre 32; fewer than 3 sources or none independent, so shown as a band.
|
1M | yes | 4 events | |
Where they are free channels with a free lane for this maker's models
ModelScope1 laneFree periods this maker's free lanes against today
free so farpast announced endofficial end aheadinferred end aheadno end announcedended / not answering● event · ◆ end announced · tap one to see it
Jul 6
Jul 13
Jul 20
Jul 27
Aug 3
Aug 10
Aug 17
Aug 24
Aug 31
Sep 7
Sep 14
Sep 21
Sep 28
Oct 5
Oct 12
Oct 19
Oct 26
Nov 2
Nov 9
Nov 16
today
ModelScope listed
no end announced
start not recorded
What happened newest first · times link to the source
Tue, Oct 2014 days ago
stepfun/step-3.7-flash:free is gone from Kilo's gateway catalogue (the paid stepfun/step-3.7-flash remains); 3 anonymous calls returned 404 "The requested model ... does not exist" (11:44-11:47Z) → end date Oct 20
Fri, Oct 1618 days ago
OpenCode Zen dropped Step 5 Preview Free: not in the model catalogue, not in the Zen model list or price table, hidden from the client, and the free-tier endpoint answers "Model is unavailable" (HTTP 400) where live free models answer 403 FreeTierError → end date Oct 16
Source: OpenCode Zen models API, model docs and free-tier endpoint (own checks) · answered 10 parallel calls on 2026-10-11; models.dev flags the ID deprecated as of 2026-10-16
OpenCode Go dropped Step 5 Preview Free: the plan's model list keeps the paid Step 5 Preview ($1.00/$2.70) with no free variant, the free ID is out of the catalogue, and an authenticated call answers 400 "Upstream request failed: Model is unavailable." (0.37s) while a control free model still answered 200 → end date Oct 16
Source: OpenCode Go docs, models API and models.dev (own checks) · models.dev flags the ID deprecated; deprecation falls between 2026-10-12T16:24Z and 2026-10-16T13:08Z from registry snapshots
Fri, Oct 925 days ago
First seen in the OpenCode Zen free catalogue; the listing may predate this check: Step 5 Preview
Source: OpenCode Zen model list
First seen in the OpenCode Go free catalogue; the listing may predate this check: Step 5 Preview
Source: OpenCode Go model list
Tue, Oct 628 days ago
became availableDots3-Note Preview · Kilo Codelive Laguna S 2.1 · Kilo Codeended Ling 3.1 Flash · Kilo Codeended Nemotron 3 Super · Kilo Codenot answering Nemotron 3 Ultra (550B-A55B) · Kilo Codelive Apodex 1.1 Mini · Kilo Codeended North Mini Code · Kilo Codelive Ling 3.0 Flash Sante · Kilo Codeended LFM 2.5 2.6B · Kilo Codelive Nemotron 3 Nano Omni 30B A3B (reasoning) · Kilo Codelive Nemotron 3.5 Lightning · Kilo Codelive Laguna XS 2.1 · Kilo Codeended Step 3.7 Flash · Kilo Codeended
Answered a test prompt through the Kilo CLI (7.8.3, roll-call) without signing in
Source: own check
Mon, Aug 3
listedLaguna XS 2.1 · Kilo Codeended North Mini Code · Kilo Codelive Step 3.7 Flash · Kilo Codeended
First seen in Kilo's model catalogue (models.dev sync): Laguna XS 2.1, North Mini Code, Step 3.7 Flash
Source: models.dev commit