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Claude Code runs on DeepSeek V4.1 Flash, but miscalculates costs

By PulseAugur Editorial · [1 sources] ·

A user successfully ran Claude Code, a tool designed for Anthropic's models, on DeepSeek's V4.1 Flash model. Despite DeepSeek's off-peak pricing of approximately $0.02 per task, Claude Code incorrectly estimated the cost at over $1.00 per task by defaulting to Claude Opus 5 pricing for the unrecognized DeepSeek model. The user confirmed that the coding task was completed accurately across three separate runs, with the model even logging changes to a file despite instructions not to alter anything beyond the requested task. AI

IMPACT Highlights potential cost discrepancies and integration issues when using third-party models with specialized AI tools.

RANK_REASON User testing of an existing tool (Claude Code) on a different model provider (DeepSeek).

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Claude Code runs on DeepSeek V4.1 Flash, but miscalculates costs

How we ranked this

Signal score
38 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
User testing of an existing tool (Claude Code) on a different model provider (DeepSeek).
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, infra
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. dev.to — LLM tag TIER_1 English(EN) · Manpreet Singh ·

    I ran Claude Code on DeepSeek V4.1 Flash. It cost 2 cents. Claude Code said 96.

    <p><strong>Short answer:</strong> yes, Claude Code runs on DeepSeek V4.1 Flash, with nine environment variables. I gave it one real coding task, three times, on fresh copies of a repo. All three passed my own checks. Each run cost about <strong>2 cents</strong> at DeepSeek's off-…

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