Step 3.5 Flash API Benchmarks, Pricing & Provider Data
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Step 3.5 Flash benchmark, API pricing, and provider data cover 57 API providers, with prices starting at $0.0010/request. Step 3.5 Flash free API options are available from 5 providers. The page also shows measured API speed and first-token latency.
Step 3.5 Flash is a fast and efficient language model, optimized for quick responses and high throughput.
Category Performance
Observed-capability estimates with uncertainty reported separately from independent benchmark families.
- Coverage
- 2 / 8
- Methodology
- V3.0
#1Reasoning54.2Provisional1/4 Measured dimensions
#2Coding52.7Provisional1/4 Measured dimensions
Specifications
Input and output token limits for this model, plus how it ranks on long-context understanding.
Features
Rankings
Excels at
Detailed scores
Updated: Sep 1, 2026Pricing
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Input price$0.100/M#11 / 181Output price$0.300/M#12 / 181
Pricing
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Agents
V3.0undefined metric} other undefined metrics}} · No data
No data80% interval30.8–69.20/4 Measured dimensions
Agents
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Coding
V3.0undefined metric} other undefined metrics}} · Provisional
Score52.780% interval36.8–68.71/4 Measured dimensionsSciCode38.5%#102 / 206
Coding
V3.0undefined metric} other undefined metrics}} · Provisional
Reasoning
V3.0undefined metric} other undefined metrics}} · Provisional
Score54.280% interval40.3–68.11/4 Measured dimensionsGPQA82.6%#80 / 213HLE24.5%#66 / 210
Reasoning
V3.0undefined metric} other undefined metrics}} · Provisional
Knowledge
V3.0undefined metric} other undefined metrics}} · No data
No data80% interval30.8–69.20/4 Measured dimensions
Knowledge
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Math
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No data80% interval30.8–69.20/4 Measured dimensions
Math
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Multilingual
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No data80% interval30.8–69.20/4 Measured dimensions
Multilingual
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Multimodal
V3.0undefined metric} other undefined metrics}} · No data
No data80% interval30.8–69.20/4 Measured dimensions
Multimodal
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Instruction following
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No data80% interval30.8–69.20/4 Measured dimensions
Instruction following
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OpenRouter endpoints
1 endpointsThird-party OpenRouter endpoint data, shown separately from LMSpeed measurements. Some 30-minute live performance fields only appear after syncing with an OpenRouter API key.
| Provider endpoint | Input | Output | 1d uptime | 30m latency | 30m throughput | Context / output |
|---|---|---|---|---|---|---|
SiliconFlow siliconflow/fp8 | $0.100/M | $0.300/M | 100% | — | — | undefined tokens / undefined tokens |
Pricing Comparison
Compare Step 3.5 Flash API pricing across 52 providers. Prices range from $0.0010/request to $1998.00/M. 3173721 API offers the lowest rate at $0.0010/request. 5 providers offer free API credits or a free tier.
| Provider | Health | Model Variant | Group | Input ($/M) | Output ($/M) | Speed (t/s) | First token | Audit |
|---|---|---|---|---|---|---|---|---|
L1 100% | step-3.5-flash | default | $0.800/request | - | 79.8 t/s | 11.79 s | — | |
L1 100% L2 62% | step-3.5-flash | nvidia | -4%$0.096/M Cache read$0.019/M | -4%$0.288/M | — | — | — | |
L1 99% | stepfun-ai/Step-3.5-Flash | default | $0.0027/request | - | — | — | — | |
L1 100% | step-3.5-flash | default | $100.00/request | - | — | — | — | |
Moyanjdc API Free | L1 100% | step-3.5-flash | default | Free | Free | — | — | — |
L1 100% | step-3.5-flash-2603 | default | Free | Free | — | — | — | |
L1 100% | step-3.5-flash | nvidia | $0.200/M Cache read$0.040/M | $0.600/M | — | — | — | |
L1 100% | step-3.5-flash | default | $375.00/M | $375.00/M | — | — | — | |
L1 100% | step-3.5-flash-2603 | default | $375.00/M | $375.00/M | — | — | — | |
L1 100% | stepfun-ai/step-3.5-flash | default | $375.00/M | $375.00/M | — | — | — | |
L1 100% | step-3.5-flash | default | -93%$0.0066/M Cache read$0.0013/M | -93%$0.020/M | — | — | — | |
L1 99% | daipai/step-3.5-flash | 按次福利模型 | $0.0010/request | - | — | — | — | |
L1 100% L2 78% | step-3.5-flash | default | -4%$0.096/M Cache read$0.019/M | -4%$0.288/M | — | — | — | |
L1 99% | stepfun-ai/Step-3.5-Flash | default | $0.343/M | $1.03/M | — | — | — | |
L1 99% | step-3.5-flash | default | $0.343/M Cache read$0.069/M | $1.03/M | — | — | — | |
L1 99% | step-3.5-flash | default | $60.00/M | $60.00/M | — | — | — | |
L1 100% | step-3.5-flash:free | default | $0.010/request | - | — | — | — | |
L1 100% | step-3.5-flash | default | $0.010/request | - | — | — | — | |
L1 100% | stepfun-ai/step-3.5-flash | default | $0.010/request | - | — | — | — | |
L1 99% | stepfun-ai/Step-3.5-Flash | default | $0.714/M | $2.14/M | — | — | — |
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Frequently Asked Questions
- What benchmark data does Step 3.5 Flash include?
- LMSpeed shows Step 3.5 Flash benchmark context, API price, output speed, first-token latency, and provider data across 57 providers when those signals are available.
- What is the Step 3.5 Flash API price?
- Step 3.5 Flash has pricing from 57 providers, ranging from $0.0010/request to $1998.00/M. 3173721 API has the lowest listed price.
- What does the Step 3.5 Flash API pricing table include?
- The Step 3.5 Flash API pricing table compares 57 providers by input price, output price, free tier status, speed, first-token latency, and recent health data when available.
- Which provider has the cheapest Step 3.5 Flash API pricing?
- 3173721 API currently has the lowest listed Step 3.5 Flash price at $0.0010/request across 57 providers.
- Can I compare Step 3.5 Flash API price and speed together?
- Yes. LMSpeed shows Step 3.5 Flash API price, output speed, first-token latency, and provider health on the same page so you can compare cost and performance together.
- Is Step 3.5 Flash API free?
- Yes, Step 3.5 Flash free API options are available through 5 providerundefined other undefined} on LMSpeed, including 91VIP API, Moyanjdc API, Dext API, Moyanjdc API, Zero API. These providers offer free API credits or a free tier with no per-token charges.
- Where can I get Step 3.5 Flash free API access?
- LMSpeed currently lists 5 free API providerundefined other undefined} for Step 3.5 Flash: 91VIP API, Moyanjdc API, Dext API, Moyanjdc API, Zero API. Check each provider row before using it because free tier limits can change.