DeepSeekDeepSeek V4 ProVSGoogleGemini 3.5 Flash Lite

Analysis by:the whichllmmodel Editorial Team|Updated: June 2026

Our Take

This matchup represents a clear tradeoff between peak intelligence and budget efficiency. DeepSeek V4 Pro is noticeably superior (holding a 3.1% average lead in benchmarks), but it carries a significant 2.6x price premium. Choose DeepSeek V4 Pro if you need top-tier reasoning or code debugging, but for high-volume pipelines, Gemini 3.5 Flash Lite is the smarter business decision.

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Model Specs

DeepSeek V4 Pro

Open SourceAPI Available

Website 🤗HF

Benchmarks & Scores

Coding (swe-bench-pro)

52.1%

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)Winner (+4.0%)

88%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)

$2.17Input: $1.74 | Output: $3.48

Context Window

1.05M tokens

Model Specs

Gemini 3.5 Flash Lite

Website

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+2.1%)

54.2%

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)

84%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)2.6x cheaper

$0.85Input: $0.30 | Output: $2.50

Context Window

1.05M tokens

Read our data collection methodology

Frequently Asked Questions about DeepSeek V4 Pro vs Gemini 3.5 Flash Lite

Gemini 3.5 Flash Lite is cheaper than DeepSeek V4 Pro. Gemini 3.5 Flash Lite has a blended cost of $0.85/1M tokens, which is about 2.6x cheaper than DeepSeek V4 Pro at $2.17/1M tokens.

Gemini 3.5 Flash Lite is better for coding tasks on this benchmark. It scores 54.2% on swe-bench-pro (excellent at multi-file repositories, autonomous agents, and industrial codebases) compared to DeepSeek V4 Pro which scores 52.1%.

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