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#157

Step 3.7 Flash

Stepfun Release: 2026-05-29 Tested on: 2026-10-01 02:04 stepfun/step-3.7-flash::low
198B total (11B active)MoEOpen source
(high) (medium) (low)

Summary

Step 3.7 Flash scores 7.2 on AI BENCHY and ranks #157. It has 10.0 reliability, a 63.8% pass rate, $0.449 total cost, and 20.72s average response time.

Model facts

Researched on 2026-08-12

Reported
Parameters
198B total (11B active)
Architecture
MoE
Availability
Open source
License
Apache-2.0

Includes the vendor-reported vision component in the total.

Parameter source Availability source

Score

7.2

Consistency

7.9

Reliability

10.0

Total Cost (Current Price)

$0.449

Total Output Tokens

339,108

Total Input Tokens

292,685

Input Price

$0.200 / 1M

Output Price

$1.150 / 1M

Cache Read Price

$0.040 / 1M

Cache Write Price

N/A

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Tests Correct

Wrong Tests: 12

Attempt pass rate: 63.8%

Flaky tests

6

Flaky tests had mixed outcomes across runs (at least one pass and one fail).

Response Time (avg)

20.72s

Response Time (max): 124.75s

Response Time (total): 476.67s

Wrong answer: 9 Invalid tool call: 2 No answer: 1

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#157 Step 3.7 Flash

low
Invalid SVG
Cost
$0.004
Time
25.3s
Tokens
3,072 tok

Run history

Tested on Score Reliability Tests Correct Total Cost Compare
2026-10-01 02:04 Re-test 7.2 10.0 $0.449 Current run
2026-07-16 22:46 New test added 7.3 10.0 $0.454 Compare
2026-06-04 13:49 New test added 7.3 10.0 $0.341 Compare
2026-05-29 11:49 Initial run 7.4 10.0 $0.336 Compare

This run used a different benchmark suite. Keep suite changes in mind when reading historical movement.

Price History

Historical pricing data for this model from OpenRouter.

Date Input Price Output Price Cache Read Price Cache Write Price
2026-08-14 12:51 $0.200 / 1M $1.150 / 1M N/A N/A
2026-10-01 18:33 $0.200 / 1M $1.150 / 1M $0.040 / 1M N/A

Charts

Choose the first model, then click a second model to open a side-by-side page.

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

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Category Breakdown

Category Score Consistency Tests Correct
Agentic 7.4 3.8
Anti-AI Tricks 8.7 7.9
Coding 8.2 7.2
Combined 7.3 5.8
Data parsing and extraction 7.3 5.8
Domain specific 2.9 7.2
General Intelligence 3.4 9.3
Instructions following 9.8 10.0
Puzzle Solving 5.5 9.9
Tool Calling 10.0 10.0
Trivia 3.0 10.0

Compared models