This model is deprecated. We only continue performance benchmarking for the default 10k input token workload. Results for other workloads are historical and no longer updated.

StepFun has launched a newer release, Step 5 Preview. We suggest considering it instead.

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Open weights model

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Released May 2026

Step 3.7 Flash API Provider Benchmarking & Analysis

Model Comparison

This analysis is intended to support you in choosing the best API provider of Step 3.7 Flash for your use-case.

Fastest

#1
StepFunStepFun
182.9 t/s
#2
DeepInfraDeepInfra
169.4 t/s

Output speed

Total 2 providers

Lowest Latency

#1
DeepInfraDeepInfra
12.51 s
#2
StepFunStepFun
13.61 s

Time to first answer token

Total 2 providers

Lowest Price

#1
DeepInfraDeepInfra
$0.15
#2
StepFunStepFun
$0.18

Blended price (per 1M tokens)

Total 2 providers

Step 3.7 Flash is available through 2 API providers, each offering different performance characteristics and pricing. Below is a comparison of the key metrics across providers.

  • For output speed, the top providers are StepFun (182.9 t/s) and DeepInfra (169.4 t/s).
  • For latency, DeepInfra (12.51s) and StepFun (13.61s) offer the lowest time to first answer token.
  • For pricing, DeepInfra (0.15) and StepFun (0.18) offer the lowest blended prices per 1M tokens.
  • DeepInfra offers both the lowest latency and best pricing, making it attractive for cost-conscious applications. StepFun is the fastest option for throughput-intensive workloads.

Highlights

Output tokens per second · Higher is better
Seconds to first answer token received · Lower is better
USD per 1M tokens (blended) · Lower is better

Pricing

Pricing: Cache Hit, Input, and Output

Price (USD per M Tokens) · Lower is better · 10,000 input tokens

Pricing: Blended Price

Blended at 7:2:1 (cache-input-output) · USD per 1M tokens (blended) · Lower is better

Pricing: Cache Discount

1 - (cache hit price / input price) · Higher is better

Output Speed vs. Price

Blended at 7:2:1 (cache-input-output) · Output speed: output tokens per second · USD per 1M tokens (blended)
Most attractive quadrant
Pareto line

Speed

Measured by Output Speed (tokens per second)

Output Speed: Step 3.7 Flash

Output speed: output tokens per second · 10,000 input tokens

Latency vs. Output Speed

Latency: seconds to first token received · Output speed: output tokens per second · 10,000 input tokens
Most attractive quadrant
Pareto line

Latency

Measured by Time (seconds) to First Token

Time to First Answer Token

Seconds to first token received · Lower is better · 10,000 input tokens

End-to-End Response Time

Seconds to output 500 tokens, calculated based on time to first token, 'thinking' time for reasoning models, and output speed

End-to-End Response Time

Seconds to output 500 tokens, including reasoning model 'thinking' time · Lower is better · 10,000 input tokens

Key Comparison Metrics & API Features

StepFun logoStepFun
256k
Open
--
183
2.68
16.34
10.93
DeepInfra logoDeepInfra
256k
Open
--
169
0.71
15.46
11.80

Frequently Asked Questions

Common questions about Step 3.7 Flash providers