DeepSeek V4.1 Flash (Non-Reasoning) API Provider Benchmarking & Analysis
This analysis is intended to support you in choosing the best API provider of DeepSeek V4.1 Flash (Non-Reasoning) for your use-case.
Fastest
LithosAI (ULTRA CHAT)LithosAI (ULTRA)LithosAI (FAST)
DeepSeekOutput speed
Total 4 providers
Lowest Latency
LithosAI (ULTRA CHAT)LithosAI (FAST)LithosAI (ULTRA)DeepSeekTime to first token
Total 4 providers
Lowest Price
LithosAI (FAST)DeepSeekLithosAI (ULTRA)LithosAI (ULTRA CHAT)Blended price (per 1M tokens)
Total 4 providers
DeepSeek V4.1 Flash (Non-reasoning) is available through 4 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 LithosAI (ULTRA CHAT) (596.1 t/s), LithosAI (ULTRA) (587.7 t/s), and LithosAI (FAST) (556.0 t/s). Speed varies significantly across providers, with a 121% difference between the fastest and slowest.
- For latency, LithosAI (ULTRA CHAT) (0.84s), LithosAI (FAST) (0.91s), and LithosAI (ULTRA) (0.95s) offer the lowest time to first token.
- For pricing, LithosAI (FAST) (0.15), DeepSeek (0.18), and LithosAI (ULTRA) (0.21) offer the lowest blended prices per 1M tokens.
- LithosAI (ULTRA CHAT) offers the best performance with both the highest speed and lowest latency. For cost optimization, LithosAI (FAST) provides the most competitive pricing.
Highlights
Update: Default performance benchmarking workload has updated to 10k input tokens to better reflect production use cases. You can still select different workloads above.
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: DeepSeek V4.1 Flash (Non-Reasoning)
Latency vs. Output Speed
Latency
Measured by Time (seconds) to First Token
Time to First 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 DeepSeek V4.1 Flash (Non-Reasoning) providers
DeepSeek V4.1 Flash (Non-Reasoning) is available through 4 API providers: DeepSeek, LithosAI (FAST), LithosAI (ULTRA), and LithosAI (ULTRA CHAT). Each provider offers different performance characteristics and pricing.
DeepSeek V4.1 Flash (Non-Reasoning) is currently available through 4 API providers that we benchmark and track.
The fastest providers for DeepSeek V4.1 Flash (Non-Reasoning) by output speed are LithosAI (ULTRA CHAT) (596.1 t/s), LithosAI (ULTRA) (587.7 t/s), and LithosAI (FAST) (556.0 t/s). Output speed measures how quickly tokens are generated after the model starts responding.
The providers with the lowest time to first token for DeepSeek V4.1 Flash (Non-Reasoning) are LithosAI (ULTRA CHAT) (0.84s), LithosAI (FAST) (0.91s), and LithosAI (ULTRA) (0.95s). Lower latency means faster initial response time.
The most affordable providers for DeepSeek V4.1 Flash (Non-Reasoning) by blended price are LithosAI (FAST) ($0.15 per 1M tokens), DeepSeek ($0.18 per 1M tokens), and LithosAI (ULTRA) ($0.21 per 1M tokens). Blended price uses a 7:2:1 cache hit/input/output token ratio.
The providers with the lowest input token pricing for DeepSeek V4.1 Flash (Non-Reasoning) are LithosAI (FAST) ($0.25 per 1M input tokens), DeepSeek ($0.30 per 1M input tokens), and LithosAI (ULTRA) ($0.35 per 1M input tokens).
The providers with the lowest output token pricing for DeepSeek V4.1 Flash (Non-Reasoning) are LithosAI (FAST) ($1.00 per 1M output tokens), DeepSeek ($1.20 per 1M output tokens), and LithosAI (ULTRA) ($1.40 per 1M output tokens).
Prices for DeepSeek V4.1 Flash (Non-Reasoning) vary up to 1.4x across providers. The most affordable is LithosAI (FAST) at $0.15 per 1M tokens, while LithosAI (ULTRA) charges $0.21 per 1M tokens.
Output speed for DeepSeek V4.1 Flash (Non-Reasoning) varies significantly across providers. LithosAI (ULTRA CHAT) is the fastest at 596.1 t/s, which is 2.2x faster than DeepSeek at 269.4 t/s.
All 4 providers of DeepSeek V4.1 Flash (Non-Reasoning) support JSON mode for structured output.
All 4 providers of DeepSeek V4.1 Flash (Non-Reasoning) support function calling (tool use).
For DeepSeek V4.1 Flash (Non-Reasoning), LithosAI (ULTRA CHAT) offers the best performance with highest speed and lowest latency. For cost optimization, LithosAI (FAST) provides the most competitive pricing.
When choosing a provider for DeepSeek V4.1 Flash (Non-Reasoning), 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 DeepSeek V4.1 Flash (Non-Reasoning)'s intelligence, capabilities, modalities, and how it compares to other models, see the model overview page. View model overview