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Step 3.5 Flash

StepFun·Released 2026-02-02

Pricing

Input

$0.10

per 1M tokens

Output

$0.30

per 1M tokens

Blended

$0.15

per 1M tokens

Cheaper than 76% of models. Median price is $0.54/1M tokens.

Cost Calculator

Tokens per day1M
100K100M

Daily

$0.15

Monthly

$4.50

vs. Similar Models

GPT-5.4 mini (medium)Q:-0.1
$1.69+1025%
GPT-5.4 nano (medium)Q:+0.3
$0.46+209%
Kimi K2.5 (Non-reasoning)Q:-0.5
$1.20+700%
Qwen3.5 27B (Non-reasoning)Q:-0.6
$0.83+457%

Performance

172

tokens/sec

Faster than 83% of models

0.82

seconds

Faster than 62% of models

12.43

seconds

Faster than 36% of models

Market Median

90 tok/s

92% faster

Median TTFT

1.11s

26% faster

Throughput/Dollar

1149

tok/s per $/1M

Speed Comparison

Grok 4.3 (Non-reasoning)
172 tok/s+0%
OpenAI: GPT-5.4 Mini
172 tok/s-0%
Mistral Small 3.1
171 tok/s-1%

Benchmarks

MMLU-ProNot evaluated
GPQA Diamond
83.1%
HLE
19.1%
LiveCodeBenchNot evaluated
SciCode
40.4%
TerminalBench Hard
27.3%
MATH-500Not evaluated
AIMENot evaluated
AIME 2025Not evaluated
IFBench
64.6%
Long Context Recall
43.0%
Tau2
94.4%
Market AverageTop Score

Quick Compare

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