Gemini 3.1 Flash Lite vs GPT-5.3-Codex

Gemini 3.1 Flash Lite leads in 5 of 8 categories

Arena ELO

Gemini 3.1 Flash Lite

Cheaper

Gemini 3.1 Flash Lite

Faster

Gemini 3.1 Flash Lite

Detailed Comparison

Category	Gemini 3.1 Flash Lite	GPT-5.3-Codex
Provider	Google	OpenAI
Context Window	1M WIN	128K
Input Price ($/1M)	$0.1 WIN	$1.75
Output Price ($/1M)	$0.4 WIN	$14
Arena ELO	1492 WIN	N/A
Coding	unknown	N/A
Reasoning	unknown	N/A
Speed (tokens/sec)	~200 t/s WIN	N/A
Open Source	No	No

Frequently Asked Questions

Which is cheaper, Gemini 3.1 Flash Lite or GPT-5.3-Codex?

Gemini 3.1 Flash Lite is approximately 97% cheaper than GPT-5.3-Codex per million tokens.

Which is better for coding, Gemini 3.1 Flash Lite or GPT-5.3-Codex?

Gemini 3.1 Flash Lite scores unknown on coding benchmarks, while GPT-5.3-Codex scores N/A.

Which has a larger context window?

Gemini 3.1 Flash Lite supports 1M context, while GPT-5.3-Codex supports 128K.

Is Gemini 3.1 Flash Lite or GPT-5.3-Codex open source?

Gemini 3.1 Flash Lite is proprietary. GPT-5.3-Codex is proprietary.

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More Comparisons

Gemini 3.1 Flash Lite vs Claude Opus 4.5 Gemini 3.1 Flash Lite vs Llama 4 Scout Gemini 3.1 Flash Lite vs Claude Sonnet 4.6 Gemini 3.1 Flash Lite vs Claude Haiku 4.5 Gemini 3.1 Flash Lite vs GLM-5.2 Gemini 3.1 Flash Lite vs Qwen 3.6 Gemini 3.1 Flash Lite vs GPT-4o Gemini 3.1 Flash Lite vs DeepSeek R1 GPT-5.3-Codex vs Claude Opus 4.5 GPT-5.3-Codex vs Llama 4 Scout GPT-5.3-Codex vs Claude Sonnet 4.6 GPT-5.3-Codex vs Claude Haiku 4.5 GPT-5.3-Codex vs GLM-5.2 GPT-5.3-Codex vs Qwen 3.6 GPT-5.3-Codex vs GPT-4o GPT-5.3-Codex vs DeepSeek R1