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 Results for other workloads are historical and no longer updated.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 model, Step 3.7 Flash. We suggest considering it instead.
For more information, see comparison of Step 3.7 Flash to other models and API provider benchmarks for Step 3.7 Flash.
Step 3.5 Flash 2603 API Provider Benchmarking & Analysis
This analysis is intended to support you in choosing the best API provider of Step 3.5 Flash 2603 for your use-case.
Fastest
StepFunOutput speed
Total 1 provider
Lowest Latency
StepFunTime to first answer token
Total 1 provider
Lowest Price
StepFunBlended price (per 1M tokens)
Total 1 provider
Step 3.5 Flash 2603 is available through StepFun.
Highlights
Pricing
Pricing: Cache Hit, Input, and Output
Pricing: Blended Price
Pricing: Cache Discount
Output Speed vs. Price
Speed
Measured by Output Speed (tokens per second)
Output Speed: Step 3.5 Flash 2603
Latency vs. Output Speed
Latency
Measured by Time (seconds) to First Token
Time to First Answer Token
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
Key Comparison Metrics & API Features
Frequently Asked Questions
Common questions about Step 3.5 Flash 2603 providers
Step 3.5 Flash 2603 is available through 1 API provider: StepFun. Each provider offers different performance characteristics and pricing.
Step 3.5 Flash 2603 is currently available through 1 API provider that we benchmark and track.
The fastest provider for Step 3.5 Flash 2603 by output speed is StepFun (141.4 t/s). Output speed measures how quickly tokens are generated after the model starts responding.
The provider with the lowest time to first answer token for Step 3.5 Flash 2603 is StepFun (17.38s). Lower latency means faster initial response time.
The most affordable provider for Step 3.5 Flash 2603 by blended price is StepFun ($0.06 per 1M tokens). Blended price uses a 7:2:1 cache hit/input/output token ratio.
The provider with the lowest input token pricing for Step 3.5 Flash 2603 is StepFun ($0.10 per 1M input tokens).
The provider with the lowest output token pricing for Step 3.5 Flash 2603 is StepFun ($0.30 per 1M output tokens).
The only provider of Step 3.5 Flash 2603 supports JSON mode for structured output.
The only provider of Step 3.5 Flash 2603 supports function calling (tool use).
StepFun leads across all key metrics for Step 3.5 Flash 2603, offering the fastest speed, lowest latency, and most competitive pricing.
When choosing a provider for Step 3.5 Flash 2603, consider: output speed (for throughput-intensive tasks), latency (for interactive applications requiring quick first responses), pricing (for cost-sensitive workloads), and API features like JSON mode or function calling.
Yes, provider performance can vary over time due to infrastructure changes, load balancing, and updates. We continuously benchmark all providers and display historical performance trends in the "Over Time" charts.
For information about Step 3.5 Flash 2603's intelligence, capabilities, modalities, and how it compares to other models, see the model overview page. View model overview