Skip to content

Weekly AI Performance Report

Week of September 22, 2026

46 models improved, 249 declined, and 5 unchanged this week across 300 tracked models.

1

Executive Summary

Biggest Gainer

Claude Opus 5.5

+426 ranks

Currently ranked #5

Biggest Loser

Ling 3.0 Flash Sante (free)

-20 ranks

Currently ranked #261

New Entries

10

new models entered rankings this week

2

Weekly Movers

Top 10 models with the largest absolute rank changes over the past 7 days.

ModelScore7d ChangeRank
Claude Opus 5.5Anthropic95.1+426#5
Grok 4.7xAI88.8+388#43
MiMo-V2.6-ProXiaomi76.2+314#117
Claude Opus 5Anthropic95.1+272#6
Claude Sonnet 5Anthropic85.2+231#63
gpt-oss-20b (batch)OpenAI57.4+211#220
GPT-6 Luna ProOpenAI40.0+197#234
GPT-6 Luna Pro (batch)OpenAI40.0+196#235
GPT-6 LunaOpenAI40.0+195#236
GPT-6 Luna (batch)OpenAI40.0+194#237
3

Top Gainers

Models with the largest positive rank improvements this week.

1+426
2+388
3+314
4
Claude Opus 5Anthropic
+272
5+231
7+197
9+195
10+194
4

Top Losers

Models with the largest negative rank drops this week.

3
Paretounbiased
-19
4-19
6
Schematron V2 Turboinference-net
-19
7
Schematron V2 Smallinference-net
-19
8-19
9-19
10-19
5

New Models

10 new models entered the rankings this week.

ModelScoreRank
Claude Opus 5.5Anthropic95.1#5
Grok 4.7xAI88.8#43
MiMo-V2.6-ProXiaomi76.2#117
gpt-oss-20b (batch)OpenAI57.4#220
GPT-6 Luna ProOpenAI40.0#234
GPT-6 Luna Pro (batch)OpenAI40.0#235
GPT-6 LunaOpenAI40.0#236
GPT-6 Luna (batch)OpenAI40.0#237
GPT-6 Sol ProOpenAI40.0#238
GPT-6 Sol Pro (batch)OpenAI40.0#239
6

Watch List

Models in a fragile state that might degrade further. Monitor closely.

ModelScore7d Change
95.1+272
92.7+8
90.5+18
90.5+80
88.8+56
88.8+30
88.8-8
88.7-10
88.7-10
88.7-10
88.7-10
88.4-10
88.4-10
87.9-9
87.8-7
87.8-6
86.7-6
86.7-6
86.7-6
85.2+231
85.2-7
85.2-7
85.1-7
85.1-7
83.5-7
83.5-7
83.5-7
83.4-7
82.4-7
82.4-7
81.8-6
81.8-6
81.8-6
81.8-6
81.4-6
81.4-6
81.0-6
81.0-6
80.9+161
80.9+189
80.9-7
80.5-7
80.5-7
79.4-7
79.4-7
79.3-7
79.3-7
79.3-7
79.3-7
79.3-7
79.1-7
79.1-7
79.1-7
79.1-7
79.0-7
79.0-7
78.6-8
78.6-8
78.0-7
78.0+11
78.0+43
78.0-9
77.9-9
77.9-9
77.7-8
77.4-8
77.0-6
76.8-6
76.8-6
76.5-6
76.5-6
76.2-7
76.0-7
75.7-7
75.7-7
75.6+120
75.6-8
75.3-7
75.2-7
75.1+13
75.1+27
75.1-9
74.8+176
74.8+187
74.8-11
74.4-11
74.4-11
74.4-10
74.3-10
74.1-10
73.9-10
73.9-15
73.8-11
73.6-10
73.4-10
73.0-10
73.0-10
73.0-10
72.9-10
72.9-10
72.9-10
72.3-8
72.1-8
72.0-8
71.8+7
71.8-10
71.6-10
71.6+6
71.6-11
71.2+60
71.2-12
71.2-12
71.2-12
71.0-12
70.8-12
70.7-12
70.7-12
69.9-9
69.9-9
69.5-8
69.3-8
69.3-8
69.3-8
68.7-8
68.7-8
68.6-8
68.4-8
68.2+159
68.2-9
68.1-9
67.7-9
67.7-9
67.4-8
67.0-8
66.8-8
66.7+6
66.7-9
66.7-9
66.5-9
66.1-9
65.9+23
65.9-10
65.7-10
65.7-10
65.6-10
65.3-10
65.3-10
64.9-10
64.7-10
64.1-9
64.1+170
64.1-12
63.9-10
63.5-10
63.4-10
63.1-10
62.5-10
62.3-10
61.9-10
61.6-10
61.5-9
61.2-9
61.0-9
60.9-9
60.4-9
60.2-9
60.2-9
58.9-9
58.9-9
57.4-9
56.5-10
56.2-10
54.0-9
53.8-9
53.8-9
51.3-8
50.8-8
48.7-7
48.7-8
47.5-8
44.5-8
42.1-8
40.7-8
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-19
40.0-20
40.0-19
40.0-18
40.0-18
40.0-18
40.0-18
40.0-18
40.0-18
40.0-18
40.0-17
40.0-17
40.0-17
40.0-17
40.0-17
40.0-17
40.0-17
40.0-17
40.0-17
40.0-16
40.0-16
40.0-15
40.0-15
40.0-15
40.0-15
40.0-15
40.0-15
40.0-13
40.0-13
40.0-12
40.0-11
40.0-11
40.0-11
40.0-11
40.0-11
40.0-11
40.0-11
40.0-11
40.0-11
40.0-11
40.0-11
7

Leaderboard Snapshot

Top 10 AI models this week by composite score.

#ModelScore7d Change
1Claude Fable 5.1Anthropic95.90
2Claude Fable 5.1 (batch)Anthropic95.90
3Claude Fable 5Anthropic95.90
4Claude Fable 5 (batch)Anthropic95.90
5Claude Opus 5.5Anthropic95.1+426
6Claude Opus 5Anthropic95.1+272
7Claude Opus 4.8Anthropic95.10
8Claude Opus 4.7Anthropic95.1-3
9Claude Opus 4.7 (batch)Anthropic95.1-3
10Claude Opus 4.8 (batch)Anthropic94.6-2
8

This Week's Numbers

Total Ranked

300

Avg Score

68.2

Top 10 Moved

5/10

Most Active Provider

OpenAI

9

Read More Analysis

Frequently Asked Questions

The weekly report summarizes seven days of AI model ranking changes. It highlights the biggest gainers and losers by rank position, new models entering the leaderboard, models in a fragile watch-list state, and a snapshot of the current top 10. All data comes from hourly-updated composite scores across 290+ models.

Gainers and losers are ranked by their 7-day rank change, which measures how many positions a model moved up or down on the leaderboard over the past week. The models with the largest positive changes are the top gainers, and those with the largest negative changes are the top losers.

The watch list contains models currently in a "fragile" state, meaning their rankings are unstable and could degrade further. Monitoring these models is important if you rely on them in production, as they may experience significant quality or performance drops in the near term.

Weekly AI Performance Report - This Week in AI Models | LM Market Cap