What is the best LLM right now?

The model at the top of this leaderboard, which ranks every model with a score on the Artificial Analysis Intelligence Index. It updates every week, so the top of the table is the leader today.

What is the Artificial Analysis Intelligence Index?

It's an independent score that averages 10 evaluations of AI models. Agents count for 30%, coding for 20%, scientific reasoning for 20% and general reasoning and knowledge for 30%.

A large language model: an AI model trained on huge amounts of text to read and write it, like the ones behind ChatGPT, Claude and Gemini.

What does the chart show?

Each dot is a model, placed by its intelligence score and its price. The line joins the models no cheaper model beats, so anything under it costs more for less.

Is the top model always the best choice?

Not always. A model a little lower on the board can cost far less or read more at once, so match it to your job.

How often is this board updated?

Every week, from OpenRouter's public model list. The date under the table shows when the leaderboard was last checked.

Where do these numbers come from?

Every model and price comes from OpenRouter's public model list. The scores are Artificial Analysis's and Design Arena's, carried in that same list.

Can I download the data?

Yes: every board has a CSV of its models, next to its chart.

What does open weights mean?

The maker publishes the model's weights, so anyone can download the model and run it on their own hardware.

What is a context window?

It's the most text a model can work with at once, counted in tokens. Your prompt and the model's reply both count toward it.

Why do some models have no score?

Not every model on OpenRouter has been tested on every measure yet. A board lists only the models with a result on its own measure.

How do I use these models?

Through each maker's own app or API, or through OpenRouter, which gives you most of them with one account.

LLM leaderboard

This LLM leaderboard ranks 177 AI models by the Artificial Analysis Intelligence Index, which averages 10 evaluations of agents, coding, science and general reasoning.

Updated Oct 1, 2026

Rank	Model
1	Claude Opus 5.5Anthropic	57.6Lead	–	–	$8	1M	Sept 22, 2026
2	Claude Sonnet 5.5Anthropic	56.0#2	–	–	$4	1M	Sept 28, 2026
3	Claude Fable 5.1Anthropic	53.4#3	81.6Lead	57.9Lead	$20	1M	Sept 1, 2026
4	GPT-6 AstraOpenAI	52.7	76.9	51.0	$20	1.1M	Sept 4, 2026
5	Gemini 4 ArgonGoogle	52.6	–	–	$4		Sept 30, 2026
6	GPT-6.1 SolOpenAI	51.8	–	–	$4	1.1M	Sept 29, 2026
7	Claude Opus 5Anthropic	50.8	78.0#2	56.5#2	$10	1M	Jul 24, 2026
8	Claude Fable 5Anthropic	49.6	76.5	50.7	$20	1M	Jun 9, 2026
9	Muse Spark 1.3Meta	48.1	75.8	–	$2	1M	Sept 2, 2026
10	GPT-6 SolOpenAI	47.6	–	–	$4	1.1M	Sept 22, 2026
11	GPT-5.6 SolOpenAI	47.0	77.4#3	50.2	$4	1.1M	Jul 9, 2026
12	Grok 4.7xAI	46.4	–	–	$3	500K	Sept 21, 2026
13	MiMo-V2.6-ProOpen weightsXiaomi	46.3	–	–	$0.54	1.1M	Sept 21, 2026
14	Qwen3.8 Max (0902)Qwen	45.4	76.2	56.0#3	$3	1M	Sept 3, 2026
15	GLM 5.3Open weightsZ.ai	44.8	74.8	53.1	$1.01	1M	Aug 18, 2026
16	Grok 4.6xAI	44.3	76.8	53.0	$3	500K	Aug 12, 2026
17	Kimi K3Open weightsMoonshot AI	43.6	76.2	50.0	$3.00	1M	Jul 16, 2026
18	GPT-5.6 TerraOpenAI	42.1	76.7	43.2	$4.50	1.1M	Jul 9, 2026
19	Claude Opus 4.8Anthropic	41.8	74.3	41.9	$10	1M	May 27, 2026
20	GLM 5.3 FlashOpen weightsZ.ai	41.8	71.5	50.9	$0.24	1M	Aug 26, 2026
21	Gemini 3.8 FlashGoogle	40.9	76.3	40.2	$1.50	1M	Sept 2, 2026
22	Claude Opus 4.7Anthropic	40.7	73.6	38.6	$10	1M	Apr 16, 2026
23	Qwen3.8 2.4T A95BOpen weightsQwen	39.9	71.9	50.1	$3	1M	Aug 12, 2026
24	Muse Spark 1.2Meta	39.6	72.2	43.2	$2	1M	Aug 5, 2026
25	DeepSeek V4.1 FlashOpen weightsDeepSeek	39.5	–	–	$0.15	1M	Sept 10, 2026

Source: Artificial Analysis's indexes and OpenRouter's prices, in US dollars per million tokens, checked Oct 1, 2026

Data by

Independent benchmark · Artificial Analysis

Top 10: Intelligence

Oct 1, 2026

157.6Claude Opus 5.5
256.0Claude Sonnet 5.5
353.4Claude Fable 5.1
452.7GPT-6 Astra
552.6Gemini 4 Argon
651.8GPT-6.1 Sol
750.8Claude Opus 5
849.6Claude Fable 5
948.1Muse Spark 1.3
1047.6GPT-6 Sol

Source: Artificial Analysis's indexes and OpenRouter's prices, in US dollars per million tokens, checked Oct 1, 2026

Data by

How to read this chart

The bars show this board's 10 best models, best first, with the top 3 in the brand's blue. The bars start just below the lowest score, so small gaps show: read the numbers on the bars. Hover a bar for its maker, or switch to Price to see what each one costs.

Comparison details

Prices are OpenRouter's list prices in US dollars per million tokens, blended 3 parts input to 1 part output, as Artificial Analysis does. Scores are Artificial Analysis's, checked Oct 1, 2026. Speed, latency and each provider's own price aren't part of the score.

Every leaderboard

Each board has its own page with every model, a chart and a CSV.

Best AI model for coding

Claude Fable 5.1 leads, from Anthropic

Best AI model for agents

Claude Fable 5.1 leads, from Anthropic

AI model pricing

Cheapest now: Mistral Nemo

Best AI model for writing

Best AI model for website design

Muse Spark 1.3 leads, from Meta

Best AI model for game development