// AI Platform Drift

DeepSeek V4 Flash 0731 prompt pricing dropped 30%

OpenRouter model catalogue · published 2026-09-26 03:56 UTC

CORRECTED 2026-10-02 17:58 UTC — [CORRECTION · WHY IT MATTERS] Original: “per-request cost just dropped by roughly a quarter to a third depending on your prompt-to-completion ratio” Fact: At unchanged token volumes, the feasible saving is 0% (completion-only) to 30% (prompt-only). A one-third saving is impossible at these rates. A 25% saving requires 160/3, approximately 53.33, prompt tokens per completion token. [CORRECTION · WHY IT MATTERS] Original: “A workload doing 100M prompt tokens per day saves $900/day.” Fact: At the captured rates, 100M prompt tokens per day saves $0.90/day.

Stood 158h 2m · cause arithmetic · every correction ↗

Captured arithmetic only; vendor rate validity, applicability and effective conditions remain unverified.

WORTH KNOWING BUDGET PRICINGMODEL

WHAT CHANGEDOpenRouter reduced prompt token pricing for deepseek/deepseek-v4-flash-0731 from $0.00000003 to $0.000000021 per token, a 30% decrease. Completion pricing remains $0.00000032 per token.

WHY IT MATTERSIf you are running this model at volume, your per-request cost just dropped by roughly a quarter to a third depending on your prompt-to-completion ratio. A workload doing 100M prompt tokens per day saves $900/day.

WHAT TO DOReforecast your AI spend for this model if it represents a material line item in your budget, and notify whoever tracks the cost center.

Model-reported confidence 95% (not measured accuracy) Primary source ↗ written by anthropic/claude-sonnet-4.5

Show the reasoning — raw diff, triage verdict, confidence

RAW DIFF

 id: deepseek/deepseek-v4-flash-0731
 name: DeepSeek: DeepSeek V4 Flash 0731
-pricing.prompt: 0.00000003
+pricing.prompt: 0.000000021
 pricing.completion: 0.00000032
 context_length: 1310720
 top_provider.max_completion_tokens: 943718

HOW IT WAS JUDGED

Triage signals below are model-reported assertions, preserved verbatim; they are not independent arithmetic verification.

triage verdict	MATERIAL at 0.95, needed 0.5
triage reasoning	Prompt token pricing decreased by 30%, directly affecting cost calculations for users.
signals	price decreased · prompt token pricing changed · specific numeric change in cost structure
suppression	—
triage model	anthropic/claude-haiku-4.5 ($0.00000)
writer model	anthropic/claude-sonnet-4.5 ($0.00000)