Step 3.5 Flash — Currently unavailable
Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....
Technical specifications
Independent benchmarks
Scores below come from Artificial Analysis, an independent third party. BazaarLink does not participate in the testing.
Intelligence 26
Coding
Math
MMLU
GPQA 83
This modelCategory leader
Overall intelligence
#168out of 573 models
Aggregated across academic benchmarks
Time to first token
#467out of 586 models
AA 全球 p50：0.75 秒
Intelligence
26
Top 29%This model26
Category leader61
Median15
GPQA
83%
—This model83%
Category leader94%
Median69%
HLE
23%
—This model23%
Category leader53%
Median7%
SciCode
39%
—This model39%
Category leader60%
Median33%
IFBench
67%
—This model67%
Category leader83%
Median44%
τ²-Bench Telecom
87%
—This model87%
Category leader99%
Median46%
AA-LCR
54%
—This model54%
Category leader76%
Median40%
Terminal-Bench Hard
33%
—This model33%
Category leader66%
Median14%
Top 5 — CodingCoding Index leaderboard
1GPT-5.6 Sol (xhigh)
openai/gpt-5-6-sol-xhigh78$5 / $304GPT-5.6 Sol (high)
openai/gpt-5-6-sol-high77$5 / $305Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)
anthropic/claude-opus-5-xhigh77$5 / $25AASource: Artificial Analysis · Independent third-party evaluation; not influenced by BazaarLinkView full evaluation on AA →
Frequently Asked Questions
Can I still use Step 3.5 Flash through BazaarLink?
No. Step 3.5 Flash is currently unavailable through BazaarLink. See the active alternatives linked on this page.
Relay integrity checks
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View the full integrity report →Related models and links
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