What is the best AI model for building full-stack apps?

The model at the top of this board, ranked by people's blind votes between full-stack apps in Design Arena. It updates every week, so the top of the table is the leader today.

How does Design Arena rank AI models?

People compare two designs made from the same prompt without seeing which model made them, and vote for the better one. Design Arena turns those votes into a rating with the Bradley-Terry model.

What does win rate mean?

It's the share of head-to-head votes a model won.

What is Design Arena?

It's a site where people vote blind between designs that AI models made from the same prompt. It calls itself the largest crowdsourced benchmark for AI-generated design.

Can I trust blind votes?

Blind votes remove brand bias, since voters don't know which model made which design. They measure which result people prefer, so they're a guide to how a design looks and works, not to how clean its code is.

How is this board different from the other design boards?

Here each model works as an agent, building the app over several steps instead of answering one prompt. So it tests planning and fixing, not only how a first result looks.

Why is the price shown next to the rating?

A model that wins a few more votes can cost many times more. The chart of rating against price shows which models give you the most for what they cost.

How often is this board updated?

Every week, from OpenRouter's public model list. The date under the table shows when the board 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.

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.

Best AI model for building full-stack apps

Find the best AI model for building full-stack apps among 41 AI models, ranked by Design Arena, where people vote blind between two full-stack apps made from the same prompt.

Updated Oct 1, 2026

Rank	Model
1	Claude Fable 5.1Anthropic	1,324Lead	57.2%	$20	Sept 1, 2026
2	Kimi K3Open weightsMoonshot AI	1,315#2	61.9%#2	$3.00	Jul 16, 2026
3	Muse Spark 1.3Meta	1,311#3	60.7%#3	$2	Sept 2, 2026
4	Claude Opus 5Anthropic	1,305	57.3%	$10	Jul 24, 2026
5	Claude Fable 5Anthropic	1,278	58.2%	$20	Jun 9, 2026
6	Grok 4.6xAI	1,262	54.9%	$3	Aug 12, 2026
7	Claude Opus 4.8Anthropic	1,247	55.3%	$10	May 27, 2026
8	Claude Sonnet 5Anthropic	1,247	53.7%	$4	Jun 30, 2026
9	Grok 4.5xAI	1,247	60.6%	$3	Jul 8, 2026
10	Gemini 3.8 FlashGoogle	1,242	48.1%	$1.50	Sept 2, 2026
11	GLM 5.2Open weightsZ.ai	1,239	60.5%	$1.31	Jun 16, 2026
12	Claude Opus 4.6Anthropic	1,218	59.8%	$10	Feb 4, 2026
13	Claude Sonnet 4.6Anthropic	1,211	64.3%Lead	$6	Feb 17, 2026
14	Muse Spark 1.2Meta	1,208	48.0%	$2	Aug 5, 2026
15	Gemini 3.7 FlashGoogle	1,207	43.5%	$1.50	Aug 13, 2026
16	Muse Spark 1.1Meta	1,197	45.4%	$2	Jul 16, 2026
17	MiniMax M3Open weightsMiniMax	1,196	47.3%	$0.53	May 31, 2026
18	Gemini 3.5 FlashGoogle	1,195	56.2%	$3.38	May 19, 2026
19	Qwen3.7 MaxQwen	1,188	47.7%	$2.21	May 21, 2026
20	Gemini 3.6 FlashGoogle	1,179	44.3%	$1.50	Jul 21, 2026
21	Kimi K2.7 CodeOpen weightsMoonshot AI	1,173	50.9%	$1.34	Jun 12, 2026
22	GLM 5.1Open weightsZ.ai	1,165	53.2%	$1.48	Apr 7, 2026
23	Claude Opus 4.5Anthropic	1,155	60.2%	$10	Nov 24, 2025
24	Kimi K2.6Open weightsMoonshot AI	1,154	49.4%	$0.78	Apr 20, 2026
25	GLM 5V TurboZ.ai	1,147	52.1%	$1.90	Apr 1, 2026

Source: Design Arena's blind votes and OpenRouter's prices, checked Oct 1, 2026

Blind votes · Design Arena

Top 10: Full-stack apps

Oct 1, 2026

11,324Claude Fable 5.1
21,315Kimi K3
31,311Muse Spark 1.3
41,305Claude Opus 5
51,278Claude Fable 5
61,262Grok 4.6
71,247Claude Opus 4.8
81,247Claude Sonnet 5
91,247Grok 4.5
101,242Gemini 3.8 Flash

Source: Design Arena's blind votes and OpenRouter's prices, checked Oct 1, 2026

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

Ratings come from people's blind votes between two results of the same prompt on Design Arena, and prices are OpenRouter's blended list prices per million tokens, checked Oct 1, 2026. A rating compares models on this board only.

Every leaderboard

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

LLM leaderboard

Claude Opus 5.5 leads, from Anthropic

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

Claude Opus 5.5 leads, from Anthropic

Best AI model for UI design

Claude Opus 5.5 leads, from Anthropic

Best AI model for data visualization

Claude Opus 5.5 leads, from Anthropic

Best AI model for SVG graphics

Claude Opus 5.5 leads, from Anthropic

Best AI model for 3D scenes

Claude Opus 5.5 leads, from Anthropic

Best AI model for building mobile apps

Claude Opus 5 leads, from Anthropic

Best AI image model

GPT Image 2.5 Sunburst (max) leads, from OpenAI

Best AI image editing model

GPT Image 2.5 Sunburst (max) leads, from OpenAI

Best AI video model

Wan 3.0 leads, from Alibaba

Best image to video AI model

Gemini Omni Flash leads, from Google

Best AI voice model

Eleven v4 leads, from ElevenLabs