DeepSeek / manual · models.dev

DeepSeek V4 Flash 0731

Opened from a screened package 410f3204cdfe.

Encoding fertility 1.20×

Harnesses

Same model, different drivers. ChatGPT is not OpenCode. $ / MU is only set when every official task passed. $ / pass still shows on a partial run; it does not rank. Time is output tokens at 80 tok/s, not wall clock.

Stack	Passed	Attempts	Time	$ / MU	$ / pass	$ / hr	Tokens / pass	Burn	$ / Alibaba
Qwen	3/3	4	2m 39s	$0.000020	$0.0292	$1.72	63,765	1.00×	$0.0292

Official jobs

Pass or fail on each sealed job. Attempts include retries. Failed tries stay in the bill.

Durable work queue	JSON Patch (RFC 6902 subset)	Token bucket and sliding window
pass · 1	pass · 2	pass · 1

Tokens by job

Billed tokens on each official job, including retries. Cache reads drop out of this count.

Qwen
61,680Durable work queue
71,279JSON Patch (RFC 6902 subset)
58,336Token bucket and sliding window

Where the bill goes

Failed attempts stay in the bill. Cache hits are a discount, shown separately.

Qwen191,295
Cache hit 1,171,456 (discount, not extra work)

Uncached in
Output
Thinking
Cache write

Retry tax

Attempts are harness calls, including failed hidden-verifier retries. Extra tries stay in the bill.

Qwendefault4 attempts · 1 extra / 3 jobs

Cache hits

Hits divided by uncached input plus hits. No cache means the harness did not report a discount.

Qwendefault87%

Encoding by slice

Native tokens per MU on the same frozen basket. Tool schemas are where fertility often doubles.

English prose30% of the basket0.92×
Code25% of the basket1.04×
Structured15% of the basket0.86×
Tool schemas10% of the basket1.05×
CJK10% of the basket3.35×
Instructions10% of the basket0.89×

Slice	Characters	Native tokens	Fertility	True in	Source
English prose	4,474	1,034	0.92×	$0.18	estimate
Code	2,321	606	1.04×	$0.21	estimate
Structured	3,067	661	0.86×	$0.17	estimate
Tool schemas	2,378	625	1.05×	$0.21	estimate
CJK	831	696	3.35×	$0.67	estimate
Instructions	1,164	260	0.89×	$0.18	estimate

Endpoints

Provider	SKU	List in	List out	Cache hit	Cache write
Alibaba	`deepseek-v4-flash-0731`	$0.20	$0.40	$0.04	-

All stacks