DeepSeekDeepSeek V4 ProVSGoogleGemini 3.1 Pro

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

Our Take

We recommend Gemini 3.1 Pro for its clear benchmark advantage, or the 2.1x cheaper DeepSeek V4 Pro only if your budget requires optimizing costs for very high-volume pipelines. While Gemini 3.1 Pro offers superior reasoning and coding, it carries a moderate price premium. Choose Gemini 3.1 Pro for quality, or DeepSeek V4 Pro for cost optimization.

▶WHY?

Benchmark Calculations & Evidence:

Coding Benchmarks: Both models were evaluated on the SWE-bench Pro benchmark. Gemini 3.1 Pro scored 54.2%, while DeepSeek V4 Pro scored 52.1%.

Reasoning Benchmarks: Both models were evaluated on the GPQA Diamond benchmark. Gemini 3.1 Pro scored 94.3%, while DeepSeek V4 Pro scored 88%.

Cost Efficiency: DeepSeek V4 Pro pricing ($1.74/M input, $3.48/M output) is 2.1x cheaper than Gemini 3.1 Pro ($2/M input, $12/M output).

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Model Specs

DeepSeek V4 Pro

Open SourceAPI Available

Website 🤗HF

Benchmarks & Scores

Coding (swe-bench-pro)

52.1%

complex codebases, multi-file repositories, and architectural planning

Reasoning (gpqa-diamond)

88%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)2.1x cheaper

$2.17Input: $1.74 | Output: $3.48

Context Window

1.05M tokens

Model Specs

Gemini 3.1 Pro

Website

Benchmarks & Scores

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

54.2%

complex codebases, multi-file repositories, and architectural planning

Reasoning (gpqa-diamond)Winner (+6.3%)

94.3%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)

$4.50Input: $2.00 | Output: $12.00

Context Window

1.05M tokens

Read our data collection methodology

Frequently Asked Questions about DeepSeek V4 Pro vs Gemini 3.1 Pro

DeepSeek V4 Pro is cheaper than Gemini 3.1 Pro. DeepSeek V4 Pro has a blended cost of $2.17/1M tokens, which is about 2.1x cheaper than Gemini 3.1 Pro at $4.50/1M tokens.

Gemini 3.1 Pro is better for coding tasks on this benchmark. It scores 54.2% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning) compared to DeepSeek V4 Pro which scores 52.1%.

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