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Best LLM for Customer Support

8 models ranked for customer support tasks. Sorted by benchmark quality score, with price as a secondary factor.

Best Quality

Gemini 3 Flash

Google

ELO 1370

Cheapest Option

GPT-5.4 nano

OpenAI

$0.20/1M/1M input

All Models for Customer Support

#	Model	Provider	Input / 1M	Output / 1M	ELO	Flags
🥇	Gemini 3 Flash	Google	$0.50/1M	$3.00/1M	1370
🥈	GPT-5.4 mini	OpenAI	$0.75/1M	$4.50/1M	1360
🥉	DeepSeek V3.2 (Chat)	DeepSeek	$0.28/1M	$0.42/1M	1355	OSS
4	Gemini 2.5 Flash	Google	$0.30/1M	$2.50/1M	1340
5	Claude Haiku 4.5	Anthropic	$1.00/1M	$5.00/1M	1320
6	Mistral Large 3	Mistral AI	$2.00/1M	$6.00/1M	1320
7	GPT-5.4 nano	OpenAI	$0.20/1M	$1.25/1M	1280
8	Mistral Medium 3	Mistral AI	$0.40/1M	$2.00/1M	1265

Why We Picked These Models

Gemini 3 Flash

$0.50/1M/1MELO 1370

Gemini 3 Flash Preview brings Gemini 3-generation quality to the Flash tier, with stronger reasoning than 2. Gemini 3-generation quality at Flash pricing.

GPT-5.4 mini

$0.75/1M/1MELO 1360

GPT-5. Strong mid-tier quality close to GPT-5.4 at 1/3 the price.

DeepSeek V3.2 (Chat)

$0.28/1M/1MELO 1355

DeepSeek V3. Frontier-class quality at ~10x lower cost than US flagships.

Compare Top Models

Gemini 3 Flash vs GPT-5.4 mini Gemini 3 Flash vs DeepSeek V3.2 (Chat)Gemini 3 Flash vs Gemini 2.5 Flash Gemini 3 Flash vs Claude Haiku 4.5

Frequently Asked Questions

What is the best LLM for customer support?

Gemini 3 Flash by Google is rated as the best model for customer support with an ELO score of 1370. Gemini 3-generation quality at Flash pricing.

What is the cheapest LLM for customer support?

GPT-5.4 nano is the most affordable option for customer support at $0.20/1M per 1M input tokens.

Is there a free LLM for customer support?

No completely free models are listed for customer support, but GPT-5.4 nano start at very low prices.