// AI Platform Drift
DeepSeek V4.1 Flash completion pricing up 146%, prompt down 43%
OpenRouter model catalogue · published 2026-09-30 22:00 UTC
CORRECTED 2026-10-02 17:58 UTC — [CORRECTION · headline] Original: “completion pricing up 146%” Fact: Completion pricing increases 36.6%.
[CORRECTION · WHAT CHANGED] Original: “completion tokens from $0.384/token to $0.944/token (+145.8%)” Fact: Completion pricing increases from $0.29/M to $0.396/M (+36.6%). The quoted values were derived from capacity fields, not actual prices.
[CORRECTION · WHY IT MATTERS] Original: “Any workload generating completions will cost 2.5x more per completion token. The prompt discount does not offset this: even at ten completion tokens per prompt token, total cost per request increases 145.8%. Budgets based on prior pricing are now materially wrong.” Fact: Completion price multiplies by 1.3655; prompt price decreases 43.4%. At ten completion tokens per prompt token, captured cost increases 35.6%, not 145.8%. Net impact depends on the mix.
Stood 43h 58m · cause extraction error · every correction ↗
Captured arithmetic only; vendor rate validity, applicability and effective conditions remain unverified.
WHAT CHANGEDOpenRouter's deepseek/deepseek-v4.1-flash model changed pricing: completion tokens from $0.384/token to $0.944/token (+145.8%), prompt tokens from $0.035/M to $0.0198/M (-43.4%). Maximum completion tokens increased from 384,000 to 943,718.
WHY IT MATTERSAny workload generating completions will cost 2.5x more per completion token. The prompt discount does not offset this: even at ten completion tokens per prompt token, total cost per request increases 145.8%. Budgets based on prior pricing are now materially wrong.
WHAT TO DOPull actual token counts from your last 30 days of deepseek-v4.1-flash usage. Multiply completion tokens by the new rate, recalculate monthly cost, and send the revised number to whoever owns the AI spend forecast.
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: 0.000000035 -pricing.completion: 0.00000029 +pricing.prompt: 0.0000000198 +pricing.completion: 0.000000396 context_length: 1048576 -top_provider.max_completion_tokens: 384000 +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 and output limits changed significantly for an active model. |
| signals | prompt pricing decreased ~43% · completion pricing increased ~37% · max_completion_tokens increased 145% (384k → 943k) |
| suppression | — |
| triage model | anthropic/claude-haiku-4.5 ($0.00000) |
| writer model | anthropic/claude-sonnet-4.5 ($0.00000) |