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Design Arena: spreadsheets leaderboard

Claude Fable 5.1 leads
1365
models measured
20
lead over #2
+4 Elo
median
1185

Leader on Design Arena: spreadsheets · read October 21

On October 21, 2026, 20 of our catalog's models had a Design Arena: spreadsheets result, and Anthropic Claude Fable 5.1 led with 1365, ahead of OpenAI GPT-6 Astra at 1361.

Design Arena shows people two designs made by two models from the same prompt (a spreadsheet, built by the model as an agent) and asks which is better. The number is the Elo rating built from those votes, as Design Arena publishes it.

Role in the index

Design Arena: spreadsheets is shown as published and does not feed any of our indexes. Read the methodology

20 models with a result

Original board: Design Arena
Design Arena: spreadsheets results for models in the catalog
# Model Result Battles Evidence Coding index Output $/Mtok
1 Claude Fable 5.1Anthropic 1365 159 84.2 $50.00
2 GPT-6 AstraOpenAI 1361 165 85.1 $50.00
3 Claude Opus 5.5Anthropic 1352 172 88.8 $20.00
4 GLM 5.1Z.ai 1315 Not published 49.2 $4.40
5 Kimi K2.6Moonshot AI 1276 Not published 52.1 $4.00
6 Claude Opus 4.8Anthropic 1270 20 65.0 $25.00
7 Claude Sonnet 5.5Anthropic 1244 116 87.3 $10.00
8 GPT-6.1 SolOpenAI 1242 155 82.4 $10.00
9 DeepSeek V4.1 Flash 1017DeepSeek 1230 164 70.3 $0.60
10 Muse WonderMeta 1227 153 71.9 $20.00
11 Gemini 4 ArgonGoogle 1142 58 81.0 $10.00
12 Kimi K3Moonshot AI 1058 142 62.3 $15.00
13 Gemini 3.8 FlashGoogle 1056 102 61.6 $3.75
14 Gemini 3.7 FlashGoogle 1053 43 58.0 $3.75
15 Muse Spark 1.3Meta 1043 163 57.4 $4.25
16 Gemini 3.6 FlashGoogle 1034 51 62.5 $3.75
17 Claude Sonnet 5Anthropic 1021 58 57.7 $10.00
18 MiniMax M3MiniMax 1009 47 39.2 $1.20
19 Muse Spark 1.1Meta 975 Not published 70.3 $4.25
20 Qwen3.8 Max (0902)Qwen 937 38 62.4 $6.00

Only models in our catalog are listed, and each appears once with its best published run. 143 rows were read from the source on October 21, 2026, and rows that match no catalog model are left out. Every other column is a figure the board publishes for the same run.