Should I use an open-source LLM for AI agents?

There are 8 open-weight models available for AI agents. Open-weight LLMs like Llama and Mistral can be self-hosted for lower per-token costs at scale, but require infrastructure investment. For lower volumes, API-based providers often offer better value.

10 Best LLMs for AI Agents in 2026

Q: What is the cheapest LLM for AI agents?

The cheapest LLM suitable for AI agents is DeepSeek R1 0528 Qwen3 8B via Novita AI at $0.068 per million tokens (blended rate). There are 148 models in this category.

The 10 best LLMs for AI agents in 2026. Frontier models ranked by reasoning, tool-use capability, and price for agentic workflows across 23+ providers.

148

Models Compared

$0.068

Cheapest

1358

Top ELO

148

ELO-Rated

What is the best LLM for AI agents?

The best LLM for AI agents is DeepSeek R1 0528 Qwen3 8B via Novita AI at $0.068 per million tokens. With an Arena ELO of 1358, it offers the best balance of quality and cost. 148 models are compared across all providers.

What Makes a Good LLM for AI Agents?

Strong multi-step reasoning and planning

Reliable tool-use and function calling

Large context window for complex workflows

Low error rate on structured output

AI Agents Models — Ranked by Value

148 models

Sorted by value: models with higher Arena ELO and lower price rank first. Models without ELO scores are sorted by cheapest price.

#	Model	Provider	Input	Output	Quality	Released↓
12	DeepSeek: DeepSeek V3.2 Exp Open	Deepinfra	$0.210	$0.320	Frontier	Dec 1
16	DeepSeek V3.2	Deepinfra	$0.260	$0.380	Frontier	Dec 1
33	DeepSeek V3.2 Speciale	OpenRouter	$0.480	$1.44	Frontier	Dec 1
45	accounts/fireworks/models/deepseek-v3p2	Fireworks AI	$0.560	$1.68	Frontier	Dec 1
31	GPT 5.1 Codex Mini	OpenAI	$0.250	$2.00	Frontier	Nov 13
34	GPT 5 Mini	Replicate	$0.250	$2.00	Frontier	Aug 7
28	Nex AGI: DeepSeek V3.1 Nex N1	OpenRouter	$0.324	$1.20	Frontier	Jun 1
1	DeepSeek R1 0528 Qwen3 8B	Novita AI	$0.060	$0.090	Frontier	May 28
9	DeepSeek R1 0528 Distill Qwen3 8B	Fireworks AI	$0.200	$0.200	Frontier	May 28
19	DeepSeek: DeepSeek V3.1 Terminus Open	Deepinfra	$0.210	$0.790	Frontier	May 28
20	DeepSeek V3.1	Deepinfra	$0.210	$0.790	Frontier	May 28
24	DeepSeek: DeepSeek V3.1 Terminus (exacto) Open	OpenRouter	$0.252	$0.948	Frontier	May 28
46	accounts/fireworks/models/deepseek-v3p1	Fireworks AI	$0.560	$1.68	Frontier	May 28
48	DeepSeek: R1 0528 Open	Deepinfra	$0.500	$2.15	Frontier	May 28
36	mistral-large-3	Azure OpenAI	$0.500	$1.50	Frontier	May 7
13	Gemini 2.5 Flash Preview 04 17	Google	$0.150	$0.600	Frontier	Apr 17
37	Gemini 2.5 Flash Preview 05 20	Google	$0.300	$2.50	Frontier	Apr 17
38	Google: Gemini 2.5 Flash Image (Nano Banana)	Google	$0.300	$2.50	Frontier	Apr 17
39	Gemini 2.5 Flash Native Audio Preview 12 2025	Google	$0.300	$2.50	Frontier	Apr 17
40	Gemini 2.5 Flash Native Audio Latest	Google	$0.300	$2.50	Frontier	Apr 17
41	Google: Gemini 2.5 Flash	Deepinfra	$0.300	$2.50	Frontier	Apr 17
42	Gemini 2.5 Flash Native Audio Preview 09 2025	Google	$0.300	$2.50	Frontier	Apr 17
43	Gemini 2.5 Flash Preview 09 2025	Google	$0.300	$2.50	Frontier	Apr 17
44	Gemini 2.5 Flash Preview TTS	Google	$0.300	$2.50	Frontier	Apr 17
4	Llama 4 Scout 17B 16e Instruct	Deepinfra	$0.080	$0.300	Frontier	Apr 5
15	Llama 4 Maverick 17B 128e Instruct Fp8	Deepinfra	$0.150	$0.600	Frontier	Apr 5
17	Llama 4 Maverick 17B 128E Instruct	Groq	$0.200	$0.600	Frontier	Apr 5
21	Grok 3 Mini Latest	xAI	$0.300	$0.500	Frontier	Feb 17
22	Grok 3 Mini	xAI	$0.300	$0.500	Frontier	Feb 17
23	Grok 3 Mini Beta	xAI	$0.300	$0.500	Frontier	Feb 17
2	DeepSeek R1 Distill Qwen 1.5b	Fireworks AI	$0.100	$0.100	Frontier	Jan 20
5	DeepSeek R1 Distill Qwen 14B	Novita AI	$0.150	$0.150	Frontier	Jan 20
10	DeepSeek R1 Distill Llama 8B	Fireworks AI	$0.200	$0.200	Frontier	Jan 20
11	DeepSeek R1 Distill Qwen 7B	Fireworks AI	$0.200	$0.200	Frontier	Jan 20
14	DeepSeek: R1 Distill Qwen 32B 32BOpen	Deepinfra	$0.270	$0.270	Frontier	Jan 20
26	TNG: DeepSeek R1T2 Chimera	OpenRouter	$0.300	$1.02	Frontier	Jan 20
32	DeepSeek: R1 Distill Llama 70B 70BOpen	Deepinfra	$0.700	$0.800	Frontier	Jan 20
49	DeepSeek R1 Basic	Fireworks AI	$0.550	$2.19	Frontier	Jan 20
50	DeepSeek R1	DeepSeek	$0.550	$2.19	Frontier	Jan 20
18	DeepSeek V3 0324	Deepinfra	$0.200	$0.770	Frontier	Dec 26
25	DeepSeek V3	Deepinfra	$0.320	$0.890	Frontier	Dec 26
6	Gemini 2.0 Flash Preview Image Generation	Google	$0.100	$0.400	Frontier	Dec 11
7	Gemini 2.0 Flash	Google	$0.100	$0.400	Frontier	Dec 11
8	Google: Gemini 2.0 Flash	Google	$0.100	$0.400	Frontier	Dec 11
30	Gemini 2.0 Flash Live 001	Google	$0.350	$1.50	Frontier	Dec 11
3	accounts/fireworks/models/llama-v3p1-405b-instruct-long	Fireworks AI	$0.100	$0.100	Frontier	Jul 23
47	Meta Llama 3.1 405B Instruct 405B	Deepinfra	$0.800	$0.800	Frontier	Jul 23
35	Mistral Large 3 675B Instruct	AWS Bedrock	$0.500	$1.50	Frontier	Feb 26
27	meta-llama/Llama-4-Maverick-17B-128E-Instruct-Turbo	Deepinfra	$0.500	$0.500	Frontier	Feb 23
29	deepseek/deepseek-v3-turbo	Novita AI	$0.400	$1.30	Frontier	Feb 23

Best LLM for Other Use Cases

Cheapest Models Coding Chatbots Summarization Creative Writing Data Extraction RAG Customer Support Code Review Translation

Frequently Asked Questions

The #1 LLM for AI agents in 2026 is DeepSeek R1 0528 Qwen3 8B via Novita AI at $0.068 per million tokens. It has an Arena ELO of 1358, placing it among the highest-rated models. This top-10 ranking considers both quality (Arena ELO) and cost to find the best value across 23+ providers.