Step 3.5 Flash
Released Jan 20, 2026 — see all recent releases
Data as of September 8, 2026 · How the score is built
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Spec sheet
Each documented value carries its source. Missing fields stay visible as not sourced or not published, rather than disappearing from the page.
- API model ID
- Not published
- Context window
- 256K
- Maximum output
- Not sourced yet
- Knowledge cutoff
- Not sourced yet
- Input modalities
- Not sourced yet
- Output modalities
- Not sourced yet
- Parameters
- Not sourced yet
- Availability
- Not sourced yet
- Cloud regions
- Not tracked yet
- Lifecycle
- Superseded
- API capabilities
- Tool calling, structured outputs, and batch support are not tracked yet
- Prompt caching
- Not documented in the pricing record
- Self-host
- Open weights available; hardware estimate not sourced
- Rate limits
- Not tracked yet
Deployment options
Self-host and provider-specific paths stay separate from benchmark evidence so operating constraints are visible before a score becomes the whole decision.
Published weights are available, but BenchLM does not yet have a sourced parameter and VRAM profile for this exact model. Hardware cost estimates stay unavailable until that sizing record is complete.
Estimate VRAM from known parametersLineage
The sequence follows explicit supersedes links. A successor's displayed score stays at least 0.1 points above its predecessor; raw benchmark rows do not move. Scores and prices remain blank when the corresponding public row or first-party rate is unavailable.
Jan 20, 2026 · you are here
Step 3.5 FlashNot publicly ranked · $0.1 / $0.3
May 29, 2026
Step 3.7 FlashScore 50.0 · $0.2 / $1.15
Base entry
How to read this profile
The visual layer above carries the decisions. These notes preserve the model, ranking, coverage, and family context behind the numbers.
We track Step 3.5 Flash, but no weighted text-model benchmark result is published on the site yet. This page shows the metadata and separate protocol evidence we can verify now; a BenchLM score will appear only if compatible public evaluations land.
Step 3.5 Flash is a open weight model with a 256K context window. No explicit reasoning mode is documented in this profile.
The profile has no source-displayable benchmark row yet.
Frequently asked questions
How does Step 3.5 Flash perform overall in AI benchmarks?
Step 3.5 Flash does not have any source-displayable benchmark rows yet, so this profile does not assign a public score or rank. Documented specifications remain visible, while score-led charts and claims stay unavailable until a published evaluation can be attached to the exact model.
Is Step 3.5 Flash open source?
Step 3.5 Flash is an open-weight model from StepFun. Its weights can be downloaded for local or hosted deployment, subject to the published license. Open weight does not automatically mean open source: training data and training code may remain private, and commercial restrictions can still apply.
Does Step 3.5 Flash have full benchmark coverage on BenchLM?
No. Step 3.5 Flash currently has 0 source-displayable rows across 427 tracked benchmark slots. The profile exposes published, non-generated evidence and leaves missing categories blank until an exact evaluation is available. Coverage describes how much was measured; it is not a penalty added to an individual benchmark result.
What is the context window size of Step 3.5 Flash?
Step 3.5 Flash has a reported context window of 256K in the exact-model catalog record. The value stays visible, but the profile marks its source link as unavailable instead of presenting it as directly documented. Maximum output length remains separate because providers often publish a different limit.
Compare Step 3.5 Flash with every tracked model411 comparisons
Last updated September 8, 2026. Runtime fields remain blank until a sourced snapshot exists.
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