GoogleGemini 3.5 Flash LiteVSOpenAIGPT-5.4

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

Our Take

This matchup represents a clear tradeoff between peak intelligence and budget efficiency. GPT-5.4 is noticeably superior (holding a 6.1% average lead in benchmarks), but it carries a massive 6.6x price premium. Choose GPT-5.4 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

Gemini 3.5 Flash Lite

Website

Benchmarks & Scores

Coding (swe-bench-pro)

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)6.6x cheaper

$0.85Input: $0.30 | Output: $2.50

Context Window

1.05M tokens

Model Specs

GPT-5.4

Website

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+3.5%)

57.7%

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

Reasoning (gpqa-diamond)Winner (+8.8%)

92.8%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)

$5.63Input: $2.50 | Output: $15.00

Context WindowLarger

1.05M tokens

Read our data collection methodology

Frequently Asked Questions about Gemini 3.5 Flash Lite vs GPT-5.4

Gemini 3.5 Flash Lite is cheaper than GPT-5.4. Gemini 3.5 Flash Lite has a blended cost of $0.85/1M tokens, which is about 6.6x cheaper than GPT-5.4 at $5.63/1M tokens.

GPT-5.4 is better for coding tasks on this benchmark. It scores 57.7% on swe-bench-pro (excellent at multi-file repositories, autonomous agents, and industrial codebases) compared to Gemini 3.5 Flash Lite which scores 54.2%.

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