Behavior that stays fixed
A dated checkpoint doesn't change under you, so evals, prompts and agent harnesses stay valid.
DeepSeek
Operational· checked every few minutesDeepSeek V4 Flash 0731 API
The DeepSeek V4 Flash 0731 API: the pinned V4 Flash release, for reproducible agents
Price per 1M tokens69%off
- Input
- $0.029
$0.14 - Output
- $0.087
$0.28 - Cached input
- $0.00044
$0.0028
Model ID
deepseek-v4-flash-0731Updated chat.py
from openai import OpenAIclient = OpenAI( base_url="https://api.zurelay.com/v1", api_key="YOUR_ZURELAY_KEY",)stream = client.chat.completions.create( model="deepseek-v4-flash-0731", messages=[ {"role": "user", "content": "Explain quicksort briefly."}, ], stream=True,)for chunk in stream: if chunk.choices: print(chunk.choices[0].delta.content or "", end="")Base URL https://api.zurelay.com/v1. Works with any OpenAI SDK. Chat API docs
- Context window
- 1M tokens
- Max output
- 384K tokens
- Reasoning
- none · low · high · max
- Input
- Text
- Released
- Jul 31, 2026
- Status
- Operational
Pricing
DeepSeek V4 Flash 0731 API pricing. A fraction of the list price.
Pay as you go from prepaid credit, with no subscription. Top up from $10. Requests that fail are never billed.
| Rate | Zurelay | DeepSeek list | You save |
|---|---|---|---|
Input per 1M tokens | $0.029 | 79%off | |
Output per 1M tokens | $0.087 | 69%off | |
Cached input per 1M tokens | $0.00044 | 84%off |
One rate at every prompt length, up to the full 1M context window. Streaming, tool calls and structured outputs cost nothing extra.
Every DeepSeek model and priceSavings calculator
Move the sliders to your monthly usage.
Input tokens per month50M
Output tokens per month10M
Zurelay
$2.32
DeepSeek list price
$9.80
You save every month$7.48
$89.76 a year
Cost
DeepSeek V4 Flash 0731 API cost, worked out.
Typical workloads at Zurelay's live prices, next to the list price.
Chatbot
50,000 requests a month, 1,500 tokens in and 300 out, 30% of the input cached. $0.000057 a request.
$2.84a month$11.61at listDocuments
20,000 requests a month, 8,000 tokens in and 500 out, 20% of the input cached. $0.00023 a request.
$4.60a month$20.81at listCoding agent
5,000 requests a month, 40,000 tokens in and 1,500 out, 85% of the input cached. $0.000319 a request.
$1.60a month$6.78at listClassification
1,000,000 requests a month, 400 tokens in and 5 out. $0.000012 a request.
$12.04a month$57.40at list
Overview
What is DeepSeek V4 Flash 0731?
DeepSeek V4 Flash 0731 is the official July 31, 2026 release of DeepSeek V4 Flash, a 284B-parameter open-weight model tuned for agents and coding. DeepSeek's own API has moved on to V4.1 Flash, so the DeepSeek V4 Flash 0731 API on Zurelay is how you keep this exact checkpoint in production.
DeepSeek-V4-Flash-0731 is the official release of DeepSeek V4 Flash. It shipped on July 31, 2026 and replaced the April preview. It keeps the preview's architecture and size, 284B total parameters with 13B active per token, and was re-post-trained for much stronger agent performance. The DeepSeek V4 Flash 0731 API gives you that exact checkpoint under a fixed, dated model ID.
DeepSeek's model card shows the jump. On Terminal Bench 2.1 it scores 82.7, up from 61.8 for the V4 Flash preview and above the 72.1 of the much larger V4 Pro preview. On DeepSWE it scores 54.4, against 7.3 for the preview. The checkpoint ships with a DSpark speculative decoding module for faster generation.
It is a text model with a 1M-token context. Reasoning effort has three levels: low, high and max. DeepSeek recommends allowing up to 384K output tokens for high and max. The model supports tool calling, and the weights are open under the MIT license.
Why a pinned snapshot? DeepSeek retired V4 Flash on its own API on September 10, 2026 and now answers the deepseek-v4-flash name with V4.1 Flash. If your prompts, evals or agent harness were tuned on 0731, calling deepseek-v4-flash-0731 on Zurelay keeps that behavior fixed. You pay $0.029 per 1M input tokens and $0.087 per 1M output tokens.
Strengths
Where DeepSeek V4 Flash 0731 shines. And what teams build with it.
Large agent gains over the preview
DeepSeek's model card lists 82.7 on Terminal Bench 2.1 and 54.4 on DeepSWE, far above the April preview.
Small active size
Only 13B parameters are active per token, which keeps responses quick and serving cheap.
Three reasoning levels
DeepSeek suggests low for simple tasks, high for daily agent work and max for complex problems.
Use cases
Reproducible agent pipelines
Keep a production agent on the exact model version it was tested with.
Evals and regression tests
Compare prompt or harness changes against a model version that never changes.
Terminal and coding agents
Run shell tasks, repository edits and tool-calling loops, where the 0731 agent training shows most.
Long-context text work
Analyze long documents and codebases inside the 1M-token window.
Get started
Call DeepSeek V4 Flash 0731 in three steps.
No waitlist and no new SDK. If your code already talks to OpenAI, it already talks to Zurelay.
- 1
Create a key
Sign up, add credit and create an API key. Set a monthly budget or a rate limit per key if you like.
- 2
Point your SDK at Zurelay
Change the base URL. Everything else in your code stays the same.
https://api.zurelay.com/v1 - 3
Use deepseek-v4-flash-0731
Send chat completions as usual. Streaming, tool calls and usage reporting work as you expect.
deepseek-v4-flash-0731
Works with the tools you already use
Compare
Similar models. All on the same key.
90%off
DeepSeek V4.1 Flash 1017
$0.03 / $0.12 per 1M tokens
Pick DeepSeek V4.1 Flash 1017 for DeepSeek's newest Flash model with image input, if you don't need this exact checkpoint.
DeepSeek V4.1 Flash 1017 API84%off
DeepSeek V4 Pro 0813
$0.23 / $0.62 per 1M tokens
Pick DeepSeek V4 Pro 0813 for the larger pinned V4 model, which scores 87.9 against 82.7 on Terminal Bench 2.1.
DeepSeek V4 Pro 0813 API90%off
DeepSeek V4 Flash
$0.03 / $0.12 per 1M tokens
Pick deepseek-v4-flash if your code uses that name and you're fine with it following DeepSeek's current Flash model.
DeepSeek V4 Flash APIHow much does the DeepSeek V4 Flash 0731 API cost?
On Zurelay, DeepSeek V4 Flash 0731 costs $0.029 per 1M input tokens and $0.087 per 1M output tokens, with cached input at $0.00044. That is 69% below the list price of $0.14 input and $0.28 output.
Is there a cheaper DeepSeek V4 Flash API?
DeepSeek no longer serves the 0731 checkpoint on its own API; the deepseek-v4-flash name there now runs V4.1 Flash. Zurelay keeps deepseek-v4-flash-0731 available at $0.029 input and $0.087 output per 1M tokens. You pay as you go, and credit you buy doesn't expire while your account is open.
How do I call the DeepSeek V4 Flash 0731 API with the OpenAI SDK?
Set the OpenAI SDK's base URL to https://api.zurelay.com/v1, use your Zurelay API key and set model to "deepseek-v4-flash-0731". Tool definitions and streaming work as they do with OpenAI models.
What is the difference between deepseek-v4-flash-0731 and deepseek-v4-flash?
deepseek-v4-flash-0731 always runs the July 31 V4 Flash checkpoint. deepseek-v4-flash follows DeepSeek's own API, which now serves that name with V4.1 Flash. Pin 0731 when you need behavior that doesn't change.
What is the DeepSeek V4 Flash 0731 context window?
It supports a 1M-token context. DeepSeek recommends allowing up to 384K output tokens when you use high or max reasoning effort.
What is DeepSeek V4 Flash 0731 best at?
Agent work: terminal tasks, repository-level coding and tool-calling loops. DeepSeek's model card shows it outperforming the V4 Pro preview on its agent benchmarks despite a far smaller active parameter count.
Does the DeepSeek V4 Flash 0731 API support streaming and per-key rate limits?
Streaming works with stream: true, as with the OpenAI API. You can set a requests-per-minute cap and a monthly budget on each Zurelay API key.
Is it the same model DeepSeek released?
Yes. Requests run DeepSeek-V4-Flash-0731, the checkpoint DeepSeek published with open weights under the MIT license. Responses are sampled, so wording varies between runs. Zurelay is independent and not affiliated with DeepSeek.
More models on Zurelay
All models- Zurelay Auto APIfrom $0.025 / $0.12 per 1M tokensAuto
- Claude Opus 5.5 API$1.40 / $7.00 per 1M tokens−65%
- GPT-6 Astra API$2.50 / $12.50 per 1M tokens−75%
- Nano Banana 2.1 APIfrom $0.03 per image−11%
- Nano Banana Pro APIfrom $0.035 per image−74%
- Nano Banana 2 APIfrom $0.025 per image−63%
- Nano Banana 2 Lite API$0.016 per image−52%
- Claude Sonnet 5.5 API$0.79 / $3.95 per 1M tokens−61%
- Claude Haiku 5.5 API$0.04 / $0.20 per 1M tokens−60%
- GPT-6.1 Sol API$0.50 / $2.50 per 1M tokens−75%
- GPT-6.1 Terra API$0.25 / $1.25 per 1M tokens−75%
- GPT-6 Sol API$0.50 / $2.50 per 1M tokens−75%
- GPT-6 Luna API$0.025 / $0.125 per 1M tokens−75%
- Grok 4.7 API$0.70 / $2.10 per 1M tokens−65%
- MiMo V2.6 Pro API$0.32 / $0.64 per 1M tokens−26%
- MiMo V2.6 Flash API$0.075 / $0.15 per 1M tokens−46%
- DeepSeek V4.1 Flash 1017 API$0.03 / $0.12 per 1M tokens−90%
- DeepSeek V4.1 Flash API$0.03 / $0.12 per 1M tokens−90%
- DeepSeek V4 Flash API$0.03 / $0.12 per 1M tokens−90%
- DeepSeek V4 Pro 0813 API$0.23 / $0.62 per 1M tokens−84%
- Claude Fable 5.2 API$3.20 / $16.00 per 1M tokens−60%
- Claude Fable 5.1 API$3.50 / $17.50 per 1M tokens−65%
- Claude Fable 5 API$3.50 / $17.50 per 1M tokens−65%
- Claude Opus 5 API$1.75 / $8.75 per 1M tokens−65%
- Claude Opus 4.8 API$2.40 / $12.00 per 1M tokens−52%
- Claude Opus 4.7 API$1.78 / $8.93 per 1M tokens−64%
- Claude Opus 4.6 API$2.40 / $12.00 per 1M tokens−52%
- Claude Haiku 4.5 API$0.54 / $2.70 per 1M tokens−46%
- GPT-5.6 Sol API$1.14 / $5.70 per 1M tokens−72%
- GPT-5.6 Terra API$0.54 / $3.26 per 1M tokens−73%
- GPT-5.6 Luna API$0.08 / $0.49 per 1M tokens−59%
- Gemini 4 Hydrogen API$0.60 / $3.00 per 1M tokens−60%
- Gemini 4 Argon API$0.80 / $4.00 per 1M tokens−60%
- Gemini 3.1 Pro API$0.50 / $3.45 per 1M tokens−71%
- Gemini 3.8 Flash API$0.22 / $1.10 per 1M tokens−71%
- Gemini 3.7 Flash API$0.32 / $1.59 per 1M tokens−58%
- Gemini 3.5 Flash-Lite API$0.12 / $1.04 per 1M tokens−58%
- Gemini 3.1 Flash-Lite API$0.10 / $0.59 per 1M tokens−61%
- GLM-5.3 API$0.38 / $1.21 per 1M tokens−73%
- GLM-5.2 API$0.38 / $1.21 per 1M tokens−73%
- GLM-5.3 Flash API$0.058 / $0.19 per 1M tokens−62%
- Kimi K3.1 Pro API$0.80 / $4.00 per 1M tokens−60%
- Kimi K3.1 Pro Highspeed API$3.30 / $16.50 per 1M tokens−18%
- Kimi K3 API$1.27 / $6.37 per 1M tokens−58%
- Qwen 3.8 Max API$1.20 / $3.60 per 1M tokens−40%
- Qwen 3.8 Flash API$0.07 / $0.22 per 1M tokens−53%
- MiniMax M3.1 Flash API$0.06 / $0.24 per 1M tokens−60%
- Qwen 3.8 Omni Flash API$0.075 / $0.235 per 1M tokens−50%
- HY4 Preview API$0.40 / $1.20 per 1M tokens−52%
- MiniMax M3 API$0.13 / $0.51 per 1M tokens−57%
- Step 5 Preview API$0.25 / $0.68 per 1M tokens−75%
- GPT Image 2.6 Flare APIfrom $0.008 per image−85%
- GPT Image 2.6 Sunburst APIfrom $0.008 per image−85%
- GPT Image 2.5 Flare APIfrom $0.008 per image−85%
- GPT Image 2.5 Sunburst APIfrom $0.008 per image−85%
- GPT Image 2 API$0.02 per image−62%
- Grok Imagine Image 2.0 APIfrom $0.045 per image−25%
- FLUX 3 Image APIfrom $0.04 per image−17%
- Seedance 2.5 APIfrom $0.135 per secondVideo
- Seedance 2.0 APIfrom $0.097 per secondVideo
- Seedance 2.0 Fast APIfrom $0.074 per secondVideo
- Kling 4.0 APIfrom $0.15 per secondVideo
- Seedance 2.0 Mini APIfrom $0.047 per secondVideo
- Gemini Omni 1.2 Flash APIfrom $0.042 per secondVideo
- Kling 3.0 APIfrom $0.125 per secondVideo
- Gemini Omni Flash APIfrom $0.042 per secondVideo
- Wan 3.0 Prime APIfrom $0.06 per secondVideo
- Wan 3.0 APIfrom $0.039 per secondVideo
- Grok Imagine Video 1.5 APIfrom $0.071 per secondVideo
- Veo 3.1 Fast APIfrom $0.025 per secondVideo
- Muse Video APIfrom $0.02 per secondVideo
- Vidu Q3 Turbo APIfrom $0.03 per secondVideo
- PixVerse V6 APIfrom $0.019 per secondVideo
- MiniMax H3 APIfrom $0.039 per secondVideo
- Suno V6 API$0.096 per song−0%
- Gemini 3.8 Flash TTS API$0.30 / $5.40 per 1M tokens−40%
- Gemini 3.1 Flash TTS API$0.60 / $12.00 per 1M tokens−40%
- GPT-6 Luna Decisions API$0.075 per 1M input tokens−25%
- Jev 1.14 API$0.035 per 1M input tokens−17%
- Jev 1.13 API$0.035 per 1M input tokens−17%
- Kimi K2.6 API$0.30 / $1.30 per 1M tokens−68%
- Kimi K2.5 API$0.20 / $0.95 per 1M tokens−68%
- MiniMax M2.5 API$0.10 / $0.39 per 1M tokens−68%
- Ministral 3 3B API$0.03 / $0.03 per 1M tokens−70%
- Ministral 3 14B API$0.06 / $0.06 per 1M tokens−70%
- Abliterated Large V2 API$2.93 / $4.88 per 1M tokens−2%
- Text Embedding 3 Small API$0.01 per 1M input tokens−50%
- Text Embedding 3 Large API$0.065 per 1M input tokens−50%
- GLM-4.7 Flash Heretic API$0.061 / $0.35 per 1M tokens−13%
- Gemma 4 Uncensored API$0.155 / $0.48 per 1M tokens−4%
Stop paying list price.
Start saving today.
Create a key in seconds, point the SDK you already use at Zurelay, and every request costs up to 90% less from the first token.