Part of Best LLM for Coding

Best LLM for Frontend & UI

Claude Opus 5.5 ranks first for Frontend & UI as of October 20, 2026.[1][2][3][4][5][6] It ranks #1 of 112 on Design Arena's UI-component category (Elo 1384), based on blind human preference. Claude Sonnet 5.5 is the next-ranked alternative. Achieves the highest objective coding score on LiveBench Coding at 91.37% (#1 of 59) while maintaining strong human preference rankings across Design Arena and LMArena benchmarks.

About this recommendation

Updated
Evidence through
Sources
22
Revision
v114

Decision audit

Why this result

Inspect the inputs and the computed order behind the recommendation.

Models screened

24

live candidates

Evaluation feeds

6

task-weighted

Winner coverage

100%

intended feed weight

Largest provider share

3 of 8

Anthropic

Established source breadth. 3 citation families and 0 practitioner families provide attributed capability reports; 0 cautionary threads retained. The largest citation family contributes 56%.

Anthropic: Claude Opus 5.5 leads the measured task comparison with 3 independent evaluation families. Community volume, release age and usage popularity add no ranking points.

Real-world track record is still developing. The recommendation can lead on independent measurements while practitioner reports accumulate.

Sources evaluated

These are the weights used in scoring. Missing measurements are omitted from each model’s average. A feed with no result for any model released in the last 60 days is stale and does not score until it catches up.

winner: Claude Opus 5.5
Evaluation feedWeightWinner resultField measured
LMArena WebDevObserved 2026-10-19 · evaluation date not supplied · max effort
27%
#123/24
Design Arena CodingObserved 2026-10-20 · evaluation date not supplied · anthropic/claude-opus-5.5-20260921
23%
#123/24
Design Arena UIObserved 2026-10-20 · evaluation date not supplied · anthropic/claude-opus-5.5-20260921
18%
#123/24
Design Arena WebsiteObserved 2026-10-20 · evaluation date not supplied · anthropic/claude-opus-5.5-20260921
14%
#323/24
LiveBench Coding (2026-06-25)Observed 2026-10-18 · evaluation date not supplied · claude-opus-5-5-max-effortfailing; last successful check 2026-10-18
9%
#219/24
LMArena WebDev Image-to-WebObserved 2026-10-19 · evaluation date not supplied · max effort
9%
#115/24

Provider concentration

Each exact model is scored separately; provider identity is not a ranking input.

Anthropic38%
  • Anthropic3 models
  • OpenAI2 models
  • deepseek1 model
  • Google1 model
  • Meta1 model

Decision table

Every published model is shown in computed order. Practitioner sources are distinct community threads, not the citations repeated in the prose below.

  1. 01Claude Opus 5.599

    Anthropic · coverage 100%

    #1 Design Arena Coding · #1 Design Arena UI

  2. 02Claude Sonnet 5.596

    Anthropic · coverage 100%

    #1 LiveBench Coding · #2 LMArena WebDev Image-to-Web

  3. 03Muse Wonder91

    Meta · coverage 82%

    #1 Design Arena Website · #2 Design Arena Coding

  4. 04Claude Fable 5.191

    Anthropic · coverage 100%

    #3 LiveBench Coding · #4 LMArena WebDev Image-to-Web

  5. 05GPT-6.1 Sol88

    OpenAI · coverage 100%

    #4 LMArena WebDev · #5 LMArena WebDev Image-to-Web

  6. 06Gemini 4 Argon87

    Google · coverage 82%

    #7 Design Arena Website · #8 LMArena WebDev

  7. 07GPT-6 Astra87

    OpenAI · coverage 45%

    #2 LMArena WebDev · #3 LMArena WebDev Image-to-Web

  8. 08DeepSeek V4.1 Flash 101786

    deepseek · coverage 82%

    #8 Design Arena Coding · #10 Design Arena Website

Task score averages the available, task-weighted measurements. Benchmark positions compare models matched to our catalog. Models measured by at least two independent evaluator families are considered first. Missing tests, practitioner report counts, popularity and release age add no points. Coverage describes evidence breadth, not a probability of correctness. Scores within two points are shown as close under this policy; this is not a statistical confidence interval. When the leading scores are that close, the model measured by more evaluator families ranks first.

  1. 01

    Claude Opus 5.5Anthropic · $4 in / $20 out per M tokens · 1M context

    Claude Opus 5.5 ranks #1 of 112 on Design Arena's UI-component category (Elo 1384), based on blind human preference.

    Best when: Its strongest result for this task is on Design Arena UI components, which measures building interface components people prefer in blind comparisons.
    Source 1
    “Within the 112 catalog models matched to this evaluation: Ranks #1 of 112 on Design Arena's UI-component category (Elo 1384), based on blind human preference.”
    Design Arena UI componentsOpen original ↗

    No practitioner reports are linked yet, so no cautions are listed. Absence of reports is not evidence of reliability.

  2. 02

    Claude Sonnet 5.5Anthropic · $2 in / $10 out per M tokens · 1M context

    Achieves the highest objective coding score on LiveBench Coding at 91.37% (#1 of 59) while maintaining strong human preference rankings across Design Arena and LMArena benchmarks.

    Best when: Prioritize for code generation tasks requiring objective correctness where it scores 91.37% on LiveBench Coding, ranking #1 of 59 models.
    Source 2
    “Within the 59 catalog models matched to this evaluation: Scores 91.37% on LiveBench Coding (#1 of 59), an objective evaluation of code generation and completion.”
    LiveBench CodingOpen original ↗

    More tips

    • Use for image-to-web conversion where it ranks #2 of 47 on LMArena WebDev's image-to-web category (Elo 1737).
      Source 5
      “Within the 47 catalog models matched to this evaluation: Ranks #2 of 47 on LMArena WebDev's image-to-web category (Elo 1737), building pages from a reference image in blind comparison.”
      LMArena WebDev image-to-webOpen original ↗

    Watch out for

    • Expect lower full-site design preference than top models, with a #5 ranking on Design Arena's website category (Elo 1325).
      Source 11
      “Within the 123 catalog models matched to this evaluation: Ranks #5 of 123 on Design Arena's website category (Elo 1325), based on blind human preference.”
      Design Arena websitesOpen original ↗
  3. 03

    Muse WonderMeta · $4 in / $20 out per M tokens · 1.0M context

    Ranks #1 on Design Arena's website category and holds #2 positions in both UI-component and coding categories, though its LMArena WebDev coding arena placement drops to #13.

    Best when: Choose for full website generation where it ranks #1 of 123 on Design Arena's website category (Elo 1361) by blind human preference.
    Source 12
    “Within the 123 catalog models matched to this evaluation: Ranks #1 of 123 on Design Arena's website category (Elo 1361), based on blind human preference.”
    Design Arena websitesOpen original ↗

    More tips

    • Use for UI component tasks where it achieves #2 of 112 on Design Arena's UI-component category (Elo 1377).
      Source 13
      “Within the 112 catalog models matched to this evaluation: Ranks #2 of 112 on Design Arena's UI-component category (Elo 1377), based on blind human preference.”
      Design Arena UI componentsOpen original ↗

    Watch out for

    • Anticipate weaker performance on LMArena's WebDev coding arena where it ranks #13 of 99 (Elo 1652), a significant drop from its Design Arena standings.
      Source 14
      “Within the 99 catalog models matched to this evaluation: Ranks #13 of 99 on LMArena's WebDev coding arena (Elo 1652), a leaderboard built from blind human preference votes on coding tasks.”
      LMArena WebDev (coding) arenaOpen original ↗
  4. 04

    Claude Fable 5.1Anthropic · $10 in / $50 out per M tokens · 1M context

    Ties for #1 on Design Arena's web-app agent category and maintains top-ten placements across most benchmarks, with LiveBench Coding showing #3 at 86.38%.

    Best when: Use for web-app agent tasks where it ties for #1 of 42 on Design Arena's web-app agent category (Elo 1318).
    Source 15
    “Within the 42 catalog models matched to this evaluation: Ranks #1 of 42 on Design Arena's web-app agent category (Elo 1318), based on blind human preference between agent-built results.”
    Design Arena web-app agentsOpen original ↗

    More tips

    • Select for objective code correctness where it scores 86.38% on LiveBench Coding (#3 of 59).
      Source 16
      “Within the 59 catalog models matched to this evaluation: Scores 86.38% on LiveBench Coding (#3 of 59), an objective evaluation of code generation and completion.”
      LiveBench CodingOpen original ↗
    • Consider for general web development with a #5 ranking on LMArena's WebDev coding arena (Elo 1743).
      Source 17
      “Within the 99 catalog models matched to this evaluation: Ranks #5 of 99 on LMArena's WebDev coding arena (Elo 1743), a leaderboard built from blind human preference votes on coding tasks.”
      LMArena WebDev (coding) arenaOpen original ↗

    No practitioner reports are linked yet, so no cautions are listed. Absence of reports is not evidence of reliability.

  5. 05

    GPT-6.1 SolOpenAI · $2 in / $10 out per M tokens · 1.1M context

    GPT-6.1 Sol ranks #4 of 99 on LMArena's WebDev coding arena (Elo 1753), a leaderboard built from blind human preference votes on coding tasks.

    Best when: Its strongest result for this task is on LMArena WebDev, which measures practical, real-world coding quality.
    Source 18
    “Within the 99 catalog models matched to this evaluation: Ranks #4 of 99 on LMArena's WebDev coding arena (Elo 1753), a leaderboard built from blind human preference votes on coding tasks.”
    LMArena WebDev (coding) arenaOpen original ↗

    No practitioner reports are linked yet, so no cautions are listed. Absence of reports is not evidence of reliability.

  6. 06

    Gemini 4 ArgonGoogle · $2 in / $10 out per M tokens · 1.0M context

    Gemini 4 Argon ranks #7 of 123 on Design Arena's website category (Elo 1315), based on blind human preference.

    Best when: Its strongest result for this task is on Design Arena websites, which measures producing complete websites people prefer in blind comparisons.
    Source 19
    “Within the 123 catalog models matched to this evaluation: Ranks #7 of 123 on Design Arena's website category (Elo 1315), based on blind human preference.”
    Design Arena websitesOpen original ↗

    No practitioner reports are linked yet, so no cautions are listed. Absence of reports is not evidence of reliability.

  7. 07

    GPT-6 AstraOpenAI · $10 in / $50 out per M tokens · 1.1M context

    Achieves #2 on LMArena's WebDev coding arena and #3 on image-to-web.

    Best when: Prioritize for LMArena-style web development tasks where it ranks #2 of 99 on the WebDev coding arena (Elo 1774).
    Source 20
    “Within the 99 catalog models matched to this evaluation: Ranks #2 of 99 on LMArena's WebDev coding arena (Elo 1774), a leaderboard built from blind human preference votes on coding tasks.”
    LMArena WebDev (coding) arenaOpen original ↗

    More tips

    • Use for image-to-web conversion with a #3 ranking on LMArena WebDev's image-to-web category (Elo 1726).
      Source 21
      “Within the 47 catalog models matched to this evaluation: Ranks #3 of 47 on LMArena WebDev's image-to-web category (Elo 1726), building pages from a reference image in blind comparison.”
      LMArena WebDev image-to-webOpen original ↗

    Watch out for

    • Note the gap between its strong preference rankings and objective coding performance, scoring 80.36% on LiveBench Coding (#16 of 59).
      Source 22
      “Within the 59 catalog models matched to this evaluation: Scores 80.36% on LiveBench Coding (#16 of 59), an objective evaluation of code generation and completion.”
      LiveBench CodingOpen original ↗
  8. 08

    DeepSeek V4.1 Flash 1017deepseek · $0.30 in / $1.20 out per M tokens · 1.0M context · open-weight

    An open-weight model with #8 on Design Arena's coding category and consistent top-15 placements, though UI-component ranking drops to #15.

    Best when: Deploy as an open-weight option for coding tasks where it ranks #8 of 117 on Design Arena's coding category (Elo 1333).
    Source 7
    “Within the 117 catalog models matched to this evaluation: Ranks #8 of 117 on Design Arena's coding category (Elo 1333), based on blind human preference between generated coding results.”
    Design Arena codingOpen original ↗

    Watch out for

    • Expect weaker UI component performance with a #15 ranking on Design Arena's UI-component category (Elo 1309).
      Source 8
      “Within the 112 catalog models matched to this evaluation: Ranks #15 of 112 on Design Arena's UI-component category (Elo 1309), based on blind human preference.”
      Design Arena UI componentsOpen original ↗

Frequently asked

What is the best model for Frontend & UI?
Claude Opus 5.5 ranks first as of October 20, 2026. Claude Opus 5.5 ranks #1 of 112 on Design Arena's UI-component category (Elo 1384), based on blind human preference.[1]
What is the best alternative to Claude Opus 5.5?
Claude Sonnet 5.5 ranks second. Achieves the highest objective coding score on LiveBench Coding at 91.37% (#1 of 59) while maintaining strong human preference rankings across Design Arena and LMArena benchmarks.[2][3][4][5][6]
Which open-weight model ranks highest for Frontend & UI?
DeepSeek V4.1 Flash 1017 is the highest-ranked open-weight model, at #8. An open-weight model with #8 on Design Arena's coding category and consistent top-15 placements, though UI-component ranking drops to #15.[7][8][9][10]

Sources

  1. 1

    “Within the 112 catalog models matched to this evaluation: Ranks #1 of 112 on Design Arena's UI-component category (Elo 1384), based on blind human preference.”

    Design Arena UI components · Benchmark · Oct 20, 2026
  2. 2

    “Within the 59 catalog models matched to this evaluation: Scores 91.37% on LiveBench Coding (#1 of 59), an objective evaluation of code generation and completion.”

    LiveBench Coding · Benchmark · Oct 18, 2026
  3. 3

    “Within the 112 catalog models matched to this evaluation: Ranks #3 of 112 on Design Arena's UI-component category (Elo 1373), based on blind human preference.”

    Design Arena UI components · Benchmark · Oct 20, 2026
  4. 4

    “Within the 117 catalog models matched to this evaluation: Ranks #3 of 117 on Design Arena's coding category (Elo 1364), based on blind human preference between generated coding results.”

    Design Arena coding · Benchmark · Oct 20, 2026
  5. 5

    “Within the 47 catalog models matched to this evaluation: Ranks #2 of 47 on LMArena WebDev's image-to-web category (Elo 1737), building pages from a reference image in blind comparison.”

    LMArena WebDev image-to-web · Benchmark · Oct 19, 2026
  6. 6

    “Within the 99 catalog models matched to this evaluation: Ranks #3 of 99 on LMArena's WebDev coding arena (Elo 1768), a leaderboard built from blind human preference votes on coding tasks.”

    LMArena WebDev (coding) arena · Benchmark · Oct 19, 2026
  7. 7

    “Within the 117 catalog models matched to this evaluation: Ranks #8 of 117 on Design Arena's coding category (Elo 1333), based on blind human preference between generated coding results.”

    Design Arena coding · Benchmark · Oct 20, 2026
  8. 8

    “Within the 112 catalog models matched to this evaluation: Ranks #15 of 112 on Design Arena's UI-component category (Elo 1309), based on blind human preference.”

    Design Arena UI components · Benchmark · Oct 20, 2026
  9. 9

    “Within the 123 catalog models matched to this evaluation: Ranks #10 of 123 on Design Arena's website category (Elo 1311), based on blind human preference.”

    Design Arena websites · Benchmark · Oct 20, 2026
  10. 10

    “Within the 99 catalog models matched to this evaluation: Ranks #10 of 99 on LMArena's WebDev coding arena (Elo 1664), a leaderboard built from blind human preference votes on coding tasks.”

    LMArena WebDev (coding) arena · Benchmark · Oct 19, 2026
  11. 11

    “Within the 123 catalog models matched to this evaluation: Ranks #5 of 123 on Design Arena's website category (Elo 1325), based on blind human preference.”

    Design Arena websites · Benchmark · Oct 20, 2026
  12. 12

    “Within the 123 catalog models matched to this evaluation: Ranks #1 of 123 on Design Arena's website category (Elo 1361), based on blind human preference.”

    Design Arena websites · Benchmark · Oct 20, 2026
  13. 13

    “Within the 112 catalog models matched to this evaluation: Ranks #2 of 112 on Design Arena's UI-component category (Elo 1377), based on blind human preference.”

    Design Arena UI components · Benchmark · Oct 20, 2026
  14. 14

    “Within the 99 catalog models matched to this evaluation: Ranks #13 of 99 on LMArena's WebDev coding arena (Elo 1652), a leaderboard built from blind human preference votes on coding tasks.”

    LMArena WebDev (coding) arena · Benchmark · Oct 19, 2026
  15. 15

    “Within the 42 catalog models matched to this evaluation: Ranks #1 of 42 on Design Arena's web-app agent category (Elo 1318), based on blind human preference between agent-built results.”

    Design Arena web-app agents · Benchmark · Oct 20, 2026
  16. 16

    “Within the 59 catalog models matched to this evaluation: Scores 86.38% on LiveBench Coding (#3 of 59), an objective evaluation of code generation and completion.”

    LiveBench Coding · Benchmark · Oct 18, 2026
  17. 17

    “Within the 99 catalog models matched to this evaluation: Ranks #5 of 99 on LMArena's WebDev coding arena (Elo 1743), a leaderboard built from blind human preference votes on coding tasks.”

    LMArena WebDev (coding) arena · Benchmark · Oct 19, 2026
  18. 18

    “Within the 99 catalog models matched to this evaluation: Ranks #4 of 99 on LMArena's WebDev coding arena (Elo 1753), a leaderboard built from blind human preference votes on coding tasks.”

    LMArena WebDev (coding) arena · Benchmark · Oct 19, 2026
  19. 19

    “Within the 123 catalog models matched to this evaluation: Ranks #7 of 123 on Design Arena's website category (Elo 1315), based on blind human preference.”

    Design Arena websites · Benchmark · Oct 20, 2026
  20. 20

    “Within the 99 catalog models matched to this evaluation: Ranks #2 of 99 on LMArena's WebDev coding arena (Elo 1774), a leaderboard built from blind human preference votes on coding tasks.”

    LMArena WebDev (coding) arena · Benchmark · Oct 19, 2026
  21. 21

    “Within the 47 catalog models matched to this evaluation: Ranks #3 of 47 on LMArena WebDev's image-to-web category (Elo 1726), building pages from a reference image in blind comparison.”

    LMArena WebDev image-to-web · Benchmark · Oct 19, 2026
  22. 22

    “Within the 59 catalog models matched to this evaluation: Scores 80.36% on LiveBench Coding (#16 of 59), an objective evaluation of code generation and completion.”

    LiveBench Coding · Benchmark · Oct 18, 2026

Rankings synthesized from community evidence and open benchmarks. See methodology. Not driven by vendor marketing.