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VECTOR WIREAI INTELLIGENCE
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Models739Deals30d267Policy30d64, 15 pendingSources1,010

Step 3.5 Flash

StepFunReleased Feb 2, 2026Deprecated

Score basis

Step 3.5 Flash is behind the leaders in coding, instruction following, reasoning, long context, agentic tasks, and factuality. Too few results yet to rate safety, math, multimodal tasks, or multilingual tasks.

Capability profile

Bars show the model's median result as a share of the leading model's, per capability. Select a row to see its results.

Limited6 capabilities
  1. Coding−28.4%4 of 10
  2. Instruction Following−32.0%1 of 3
  3. Reasoning−32.1%3 of 6
  4. Long Context−36.6%1 of 3
  5. Agentic−37.1%2 of 7
  6. Factuality−37.2%2 of 4
Not rated4 capabilities

Too few results yet to rate Safety, Math, Multimodal or Multilingual.

Price

$0.10input$0.30outputper million tokens

From Artificial Analysis · 2 providers tracked · All prices

Cheaper than 84% of 328 priced models · 3:1 input-to-output blend, log scale

Evidence

58results on36benchmarks

  • 6 independently verified
  • 29 aggregator
  • 23 vendor-reported

From 9 sources · latest Oct 7, 2026 · How verification works

API features

Tool callingReasoning

As listed by OpenRouter

Step 3.5 Flash benchmark results

58 results on 36 benchmarks, grouped by capability. Each bar is the result as a share of the capability leader's; every result links to its source.

Coding

LimitedFull coding ranking

28.4% behind the leader4 of 10 ranked benchmarks measured

Show 2 more coding resultsHide 2 coding results

Instruction Following

LimitedFull instruction following ranking

32.0% behind the leader1 of 3 ranked benchmarks measured

Show 1 more instruction following resultHide 1 instruction following result

Reasoning

LimitedFull reasoning ranking

32.1% behind the leader3 of 6 ranked benchmarks measured

Show 5 more reasoning resultsHide 5 reasoning results

Long Context

LimitedFull long context ranking

36.6% behind the leader1 of 3 ranked benchmarks measured

Show 1 more long context resultHide 1 long context result

Agentic

LimitedFull agentic ranking

37.1% behind the leader2 of 7 ranked benchmarks measured

Show 1 more agentic resultHide 1 agentic result

Factuality

LimitedFull factuality ranking

37.2% behind the leader2 of 4 ranked benchmarks measured

Show 2 more factuality resultsHide 2 factuality results

Math

Not enough dataFull math ranking

0 of 5 ranked benchmarks measured

Show 5 more math resultsHide 5 math results

More results

Benchmarks outside the capability baskets. They are not ranked against a leader.

Show 19 more resultsHide 19 results

Step 3.5 Flash: common questions

Who makes Step 3.5 Flash?

Step 3.5 Flash is made by StepFun.

When was Step 3.5 Flash released?

Step 3.5 Flash was released on Feb 2, 2026, according to Artificial Analysis.

What is Step 3.5 Flash good at?

Step 3.5 Flash is behind the leaders in coding, instruction following, reasoning, long context, agentic tasks, and factuality. Too few results yet to rate safety, math, multimodal tasks, or multilingual tasks.

How much does Step 3.5 Flash cost?

Step 3.5 Flash costs $0.10 per million input tokens and $0.30 per million output tokens, according to Artificial Analysis. We track its price at 2 providers. At a mix of three input tokens to one output token, it is cheaper than 84% of the 328 priced models we track.

How many benchmarks has Step 3.5 Flash been tested on?

We track 58 results for Step 3.5 Flash on 36 benchmarks from 9 sources, 6 of them independently verified. The latest was recorded on Oct 7, 2026.

Which API features does Step 3.5 Flash support?

OpenRouter lists tool calling and reasoning for Step 3.5 Flash.

About this record

Where Step 3.5 Flash's numbers come from, and every name it appears under.

Tracked since
Apr 27, 2026
Newest source mention
Aug 23, 2026

Where the results come from

Verification: 58 scores · 6 independently verified · 29 aggregator-attributed · 23 vendor-reported. How these tiers are assigned

From 9 sources on 4 sites. Artificial Analysis supplies 29 of them; the 6 independently verified results come from 1 site. Bars are coloured by trust tier.

  • artificialanalysis.ai29
  • huggingface.co17
  • api.llm-stats.com6
  • matharena.ai6

Also known as

step 3.5 flash 2603step-3-5-flash