// AI Platform Drift
DeepSeek V4.1 Flash pricing increased 3x prompt, 2x completion
OpenRouter model catalogue · published 2026-09-26 10:57 UTC
CORRECTED 2026-10-02 17:58 UTC — [CORRECTION · WHY IT MATTERS] Original: “A workload processing 1B tokens monthly goes from ~$660 to ~$1500.” Fact: For 1B total prompt-plus-completion tokens, captured component prices bound cost at $99–$600 before and $300–$1,200 after. Exact cost requires the token mix; $660 and $1,500 exceed the respective bounds.
Stood 151h 1m · cause arithmetic · every correction ↗
Captured arithmetic only; vendor rate validity, applicability and effective conditions remain unverified.
WHAT CHANGEDOpenRouter pricing for deepseek/deepseek-v4.1-flash changed from $0.000000099 to $0.0000003 per prompt token (3x increase) and $0.0000006 to $0.0000012 per completion token (2x increase). No effective date stated.
WHY IT MATTERSIf you are calling this model through OpenRouter, your inference costs will increase by 2-3x on the next invoice. A workload processing 1B tokens monthly goes from ~$660 to ~$1500.
WHAT TO DOCalculate your current monthly token volume for this model, multiply prompt tokens by 3x and completion tokens by 2x to get the new cost, and update your budget forecast. If the increase is material, evaluate switching to a different model or provider before the next billing cycle.
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-v4.1-flash name: DeepSeek: DeepSeek V4.1 Flash -pricing.prompt: 0.000000099 -pricing.completion: 0.0000006 +pricing.prompt: 0.0000003 +pricing.completion: 0.0000012 context_length: 1048576 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 0.98, needed 0.5 |
|---|---|
| triage reasoning | Pricing for an active model increased significantly on both prompt and completion tokens. |
| signals | pricing.prompt increased 3x (0.000000099 → 0.0000003) · pricing.completion increased 2x (0.0000006 → 0.0000012) · price change on active model |
| suppression | — |
| triage model | anthropic/claude-haiku-4.5 ($0.00000) |
| writer model | anthropic/claude-sonnet-4.5 ($0.00000) |