Only the news that moves the race.
Every item is generated from a real leaderboard change: a new #1, a debut in the top five or a jump of five places or more. Each links to its source.
October 2026
- Oct 18Big moves
DeepSeek V4.1 Flash climbs from #20 to #10 on LMArena WebDev
On the LMArena WebDev leaderboard published Oct 18, 2026, DeepSeek V4.1 Flash rose 10 places to #10 (1670).
Why it matters
Large single-update moves usually follow a model update or a wave of new votes.
V4.1 Flash#13 - Oct 15New #1
Claude Opus 5.5 takes #1 on LMArena Text · Instruction Following
On the LMArena Text · Instruction Following leaderboard published Oct 15, 2026, Claude Opus 5.5 moved from #2 to #1 with 1536, ahead of Gemini 4 Argon (1536).
Why it matters
LMArena Text · Instruction Following is the source for the Instruction Following race on AIModelRace, so the race leader follows it.
Opus 5.5#1Gemini 4 Argon#3 - Oct 15New entries
Muse Wonder debuts at #5 on LMArena Text · Medicine & Healthcare
Muse Wonder appeared on the LMArena Text · Medicine & Healthcare leaderboard for the first time on Oct 15, 2026, placing #5 with 1508.
Why it matters
New entries near the top of LMArena Text · Medicine & Healthcare move the Medicine & Health race on AIModelRace.
Muse Wonder - Oct 13New #1
Claude Opus 5.5 takes #1 on LMArena Text · Writing, Literature & Language
On the LMArena Text · Writing, Literature & Language leaderboard published Oct 13, 2026, Claude Opus 5.5 moved from #2 to #1 with 1531, ahead of Gemini 4 Argon (1530).
Why it matters
LMArena Text · Writing, Literature & Language is the source for the Professional Writing race on AIModelRace, so the race leader follows it.
Opus 5.5#1Gemini 4 Argon#3 - Oct 13New entries
Muse Wonder debuts at #2 on LMArena Text · Multi-Turn
Muse Wonder appeared on the LMArena Text · Multi-Turn leaderboard for the first time on Oct 13, 2026, placing #2 with 1531.
Why it matters
New entries near the top of LMArena Text · Multi-Turn move the Conversation race on AIModelRace.
Muse Wonder - Oct 13Big moves
Muse Spark 1.2 climbs from #17 to #10 on LMArena Text · Medicine & Healthcare
On the LMArena Text · Medicine & Healthcare leaderboard published Oct 13, 2026, Muse Spark 1.2 rose 7 places to #10 (1494).
Why it matters
Large single-update moves usually follow a model update or a wave of new votes.
Spark 1.2 - Oct 9New entries
Claude Opus 5.5 debuts at #2 on LMArena Vision
Claude Opus 5.5 appeared on the LMArena Vision leaderboard for the first time on Oct 9, 2026, placing #2 with 1321.
Why it matters
New entries near the top of LMArena Vision move the Image Understanding race on AIModelRace.
Opus 5.5#1 - Oct 8New #1
Claude Opus 5.5 takes #1 on LMArena Code Agent
On the LMArena Code Agent leaderboard published Oct 8, 2026, Claude Opus 5.5 moved from #2 to #1 with +14.3 points, ahead of GPT-6 Astra (+13.1 points).
Why it matters
LMArena Code Agent is the source for the Agentic Coding race on AIModelRace, so the race leader follows it.
Opus 5.5#1GPT-6 Astra#8 - Oct 6New entries
Nano Banana 2.1 debuts at #4 on LMArena Text-to-Image · Photorealistic
Nano Banana 2.1 appeared on the LMArena Text-to-Image · Photorealistic leaderboard for the first time on Oct 6, 2026, placing #4 with 1339.
Why it matters
New entries near the top of LMArena Text-to-Image · Photorealistic move the Photoreal race on AIModelRace.
Nano Banana 2.1#4 - Oct 6New entries
Nano Banana 2.1 debuts at #5 on LMArena Text-to-Image · Text Rendering
Nano Banana 2.1 appeared on the LMArena Text-to-Image · Text Rendering leaderboard for the first time on Oct 6, 2026, placing #5 with 1363.
Why it matters
New entries near the top of LMArena Text-to-Image · Text Rendering move the Text Rendering race on AIModelRace.
Nano Banana 2.1#4 - Oct 2New #1
Claude Opus 5.5 takes #1 on LMArena Text · Creative Writing
On the LMArena Text · Creative Writing leaderboard published Oct 2, 2026, Claude Opus 5.5 moved from #2 to #1 with 1532, ahead of Gemini 4 Argon (1531).
Why it matters
LMArena Text · Creative Writing is the source for the Creative Writing race on AIModelRace, so the race leader follows it.
Opus 5.5#1Gemini 4 Argon#3 - Oct 2New entries
Claude Sonnet 5.5 debuts at #3 on LMArena Code Agent
Claude Sonnet 5.5 appeared on the LMArena Code Agent leaderboard for the first time on Oct 2, 2026, placing #3 with +12.5 points.
Why it matters
New entries near the top of LMArena Code Agent move the Agentic Coding race on AIModelRace.
Sonnet 5.5#7 - Oct 2New entries
GPT-6.1 Sol debuts at #5 on LMArena Code Agent
GPT-6.1 Sol appeared on the LMArena Code Agent leaderboard for the first time on Oct 2, 2026, placing #5 with +11.2 points.
Why it matters
New entries near the top of LMArena Code Agent move the Agentic Coding race on AIModelRace.
GPT-6.1 Sol#5
September 2026
- Sep 30New entries
Gemini 4 Argon debuts at #1 on LMArena Text · Coding
Gemini 4 Argon appeared on the LMArena Text · Coding leaderboard for the first time on Sep 30, 2026, placing #1 with 1546.
Why it matters
New entries near the top of LMArena Text · Coding move the Coding Q&A race on AIModelRace.
Gemini 4 Argon#3 - Sep 30New entries
Gemini 4 Argon debuts at #1 on LMArena Text · Math
Gemini 4 Argon appeared on the LMArena Text · Math leaderboard for the first time on Sep 30, 2026, placing #1 with 1534.
Why it matters
New entries near the top of LMArena Text · Math move the Math Chat race on AIModelRace.
Gemini 4 Argon#3 - Sep 30New entries
Gemini 4 Argon debuts at #1 on LMArena Text · Medicine & Healthcare
Gemini 4 Argon appeared on the LMArena Text · Medicine & Healthcare leaderboard for the first time on Sep 30, 2026, placing #1 with 1554.
Why it matters
New entries near the top of LMArena Text · Medicine & Healthcare move the Medicine & Health race on AIModelRace.
Gemini 4 Argon#3 - Sep 30New entries
Claude Opus 5.5 debuts at #2 on LMArena Text · Medicine & Healthcare
Claude Opus 5.5 appeared on the LMArena Text · Medicine & Healthcare leaderboard for the first time on Sep 30, 2026, placing #2 with 1533.
Why it matters
New entries near the top of LMArena Text · Medicine & Healthcare move the Medicine & Health race on AIModelRace.
Opus 5.5#1 - Sep 30New entries
Gemini 4 Argon debuts at #1 on LMArena Text · Life, Physical & Social Science
Gemini 4 Argon appeared on the LMArena Text · Life, Physical & Social Science leaderboard for the first time on Sep 30, 2026, placing #1 with 1549.
Why it matters
New entries near the top of LMArena Text · Life, Physical & Social Science move the Science Q&A race on AIModelRace.
Gemini 4 Argon#3 - Sep 30New entries
Gemini 4 Argon debuts at #1 on LMArena Text · Creative Writing
Gemini 4 Argon appeared on the LMArena Text · Creative Writing leaderboard for the first time on Sep 30, 2026, placing #1 with 1534.
Why it matters
New entries near the top of LMArena Text · Creative Writing move the Creative Writing race on AIModelRace.
Gemini 4 Argon#3 - Sep 30New entries
Gemini 4 Argon debuts at #1 on LMArena Text · Writing, Literature & Language
Gemini 4 Argon appeared on the LMArena Text · Writing, Literature & Language leaderboard for the first time on Sep 30, 2026, placing #1 with 1532.
Why it matters
New entries near the top of LMArena Text · Writing, Literature & Language move the Professional Writing race on AIModelRace.
Gemini 4 Argon#3 - Sep 30New entries
Gemini 4 Argon debuts at #1 on LMArena Text · Non-English
Gemini 4 Argon appeared on the LMArena Text · Non-English leaderboard for the first time on Sep 30, 2026, placing #1 with 1523.
Why it matters
New entries near the top of LMArena Text · Non-English move the Multilingual race on AIModelRace.
Gemini 4 Argon#3 - Sep 30New entries
Gemini 4 Argon debuts at #1 on LMArena Text · Instruction Following
Gemini 4 Argon appeared on the LMArena Text · Instruction Following leaderboard for the first time on Sep 30, 2026, placing #1 with 1538.
Why it matters
New entries near the top of LMArena Text · Instruction Following move the Instruction Following race on AIModelRace.
Gemini 4 Argon#3 - Sep 30New entries
Gemini 4 Argon debuts at #1 on LMArena Text · Multi-Turn
Gemini 4 Argon appeared on the LMArena Text · Multi-Turn leaderboard for the first time on Sep 30, 2026, placing #1 with 1556.
Why it matters
New entries near the top of LMArena Text · Multi-Turn move the Conversation race on AIModelRace.
Gemini 4 Argon#3 - Sep 30New entries
GPT-6.1 Sol debuts at #3 on LMArena WebDev
GPT-6.1 Sol appeared on the LMArena WebDev leaderboard for the first time on Sep 30, 2026, placing #3 with 1759.
Why it matters
New entries near the top of LMArena WebDev move the Frontend & UI race on AIModelRace.
GPT-6.1 Sol#5 - Sep 30New entries
GPT-6.1 Sol debuts at #4 on LMArena WebDev · React
GPT-6.1 Sol appeared on the LMArena WebDev · React leaderboard for the first time on Sep 30, 2026, placing #4 with 1762.
Why it matters
New entries near the top of LMArena WebDev · React move the React Web Apps race on AIModelRace.
GPT-6.1 Sol#5 - Sep 29New entries
Claude Sonnet 5.5 debuts at #4 on LMArena WebDev
Claude Sonnet 5.5 appeared on the LMArena WebDev leaderboard for the first time on Sep 29, 2026, placing #4 with 1699.
Why it matters
New entries near the top of LMArena WebDev move the Frontend & UI race on AIModelRace.
Sonnet 5.5#7 - Sep 29New entries
Claude Sonnet 5.5 debuts at #4 on LMArena WebDev · React
Claude Sonnet 5.5 appeared on the LMArena WebDev · React leaderboard for the first time on Sep 29, 2026, placing #4 with 1726.
Why it matters
New entries near the top of LMArena WebDev · React move the React Web Apps race on AIModelRace.
Sonnet 5.5#7 - Sep 27New entries
Claude Opus 5.5 debuts at #2 on LMArena Code Agent
Claude Opus 5.5 appeared on the LMArena Code Agent leaderboard for the first time on Sep 27, 2026, placing #2 with +12.2 points.
Why it matters
New entries near the top of LMArena Code Agent move the Agentic Coding race on AIModelRace.
Opus 5.5#1 - Sep 27Big moves
Grok 4.7 climbs from #16 to #10 on LMArena Code Agent
On the LMArena Code Agent leaderboard published Sep 27, 2026, Grok 4.7 rose 6 places to #10 (+4.4 points).
Why it matters
Large single-update moves usually follow a model update or a wave of new votes.
Grok 4.7#18 - Sep 25New entries
Claude Opus 5.5 debuts at #1 on LMArena Text · Coding
Claude Opus 5.5 appeared on the LMArena Text · Coding leaderboard for the first time on Sep 25, 2026, placing #1 with 1545.
Why it matters
New entries near the top of LMArena Text · Coding move the Coding Q&A race on AIModelRace.
Opus 5.5#1 - Sep 25New entries
MiMo-V2.6-Pro debuts at #2 on LMArena Text · Coding
MiMo-V2.6-Pro appeared on the LMArena Text · Coding leaderboard for the first time on Sep 25, 2026, placing #2 with 1538.
Why it matters
New entries near the top of LMArena Text · Coding move the Coding Q&A race on AIModelRace.
MiMo-V2.6-Pro#10 - Sep 25New entries
Gemini 3.8 Flash debuts at #2 on LMArena Text · Math
Gemini 3.8 Flash appeared on the LMArena Text · Math leaderboard for the first time on Sep 25, 2026, placing #2 with 1528.
Why it matters
New entries near the top of LMArena Text · Math move the Math Chat race on AIModelRace.
3.8 Flash#4 - Sep 25New #1
Muse Spark 1.2 takes #1 on LMArena Text · Medicine & Healthcare
On the LMArena Text · Medicine & Healthcare leaderboard published Sep 25, 2026, Muse Spark 1.2 moved from #3 to #1 with 1519, ahead of Claude Fable 5.1 (1518).
Why it matters
LMArena Text · Medicine & Healthcare is the source for the Medicine & Health race on AIModelRace, so the race leader follows it.
Spark 1.2Fable 5.1#2 - Sep 25New entries
Claude Opus 5.5 debuts at #1 on LMArena Text · Life, Physical & Social Science
Claude Opus 5.5 appeared on the LMArena Text · Life, Physical & Social Science leaderboard for the first time on Sep 25, 2026, placing #1 with 1540.
Why it matters
New entries near the top of LMArena Text · Life, Physical & Social Science move the Science Q&A race on AIModelRace.
Opus 5.5#1 - Sep 25New entries
Claude Opus 5.5 debuts at #1 on LMArena Text · Creative Writing
Claude Opus 5.5 appeared on the LMArena Text · Creative Writing leaderboard for the first time on Sep 25, 2026, placing #1 with 1538.
Why it matters
New entries near the top of LMArena Text · Creative Writing move the Creative Writing race on AIModelRace.
Opus 5.5#1 - Sep 25New entries
Claude Opus 5.5 debuts at #1 on LMArena Text · Writing, Literature & Language
Claude Opus 5.5 appeared on the LMArena Text · Writing, Literature & Language leaderboard for the first time on Sep 25, 2026, placing #1 with 1535.
Why it matters
New entries near the top of LMArena Text · Writing, Literature & Language move the Professional Writing race on AIModelRace.
Opus 5.5#1 - Sep 25New entries
Claude Opus 5.5 debuts at #1 on LMArena Text · Non-English
Claude Opus 5.5 appeared on the LMArena Text · Non-English leaderboard for the first time on Sep 25, 2026, placing #1 with 1513.
Why it matters
New entries near the top of LMArena Text · Non-English move the Multilingual race on AIModelRace.
Opus 5.5#1 - Sep 25New entries
Claude Opus 5.5 debuts at #1 on LMArena Text · Instruction Following
Claude Opus 5.5 appeared on the LMArena Text · Instruction Following leaderboard for the first time on Sep 25, 2026, placing #1 with 1535.
Why it matters
New entries near the top of LMArena Text · Instruction Following move the Instruction Following race on AIModelRace.
Opus 5.5#1 - Sep 25New entries
Claude Opus 5.5 debuts at #1 on LMArena Text · Multi-Turn
Claude Opus 5.5 appeared on the LMArena Text · Multi-Turn leaderboard for the first time on Sep 25, 2026, placing #1 with 1520.
Why it matters
New entries near the top of LMArena Text · Multi-Turn move the Conversation race on AIModelRace.
Opus 5.5#1 - Sep 25New entries
GPT-6 Sol debuts at #5 on LMArena Code Agent
GPT-6 Sol appeared on the LMArena Code Agent leaderboard for the first time on Sep 25, 2026, placing #5 with +7.7 points.
Why it matters
New entries near the top of LMArena Code Agent move the Agentic Coding race on AIModelRace.
GPT-6 Sol - Sep 25Big moves
Kimi K3 climbs from #16 to #10 on LMArena Text · Multi-Turn
On the LMArena Text · Multi-Turn leaderboard published Sep 25, 2026, Kimi K3 rose 6 places to #10 (1488).
Why it matters
Large single-update moves usually follow a model update or a wave of new votes.
Kimi K3#12 - Sep 23New entries
Claude Opus 5.5 debuts at #1 on LMArena WebDev
Claude Opus 5.5 appeared on the LMArena WebDev leaderboard for the first time on Sep 23, 2026, placing #1 with 1818.
Why it matters
New entries near the top of LMArena WebDev move the Frontend & UI race on AIModelRace.
Opus 5.5#1 - Sep 23New entries
Claude Opus 5.5 debuts at #1 on LMArena WebDev · React
Claude Opus 5.5 appeared on the LMArena WebDev · React leaderboard for the first time on Sep 23, 2026, placing #1 with 1851.
Why it matters
New entries near the top of LMArena WebDev · React move the React Web Apps race on AIModelRace.
Opus 5.5#1 - Sep 23New entries
GPT-6 Sol debuts at #5 on LMArena WebDev
GPT-6 Sol appeared on the LMArena WebDev leaderboard for the first time on Sep 23, 2026, placing #5 with 1686.
Why it matters
New entries near the top of LMArena WebDev move the Frontend & UI race on AIModelRace.
GPT-6 Sol - Sep 23New entries
GPT-6 Sol debuts at #5 on LMArena WebDev · React
GPT-6 Sol appeared on the LMArena WebDev · React leaderboard for the first time on Sep 23, 2026, placing #5 with 1694.
Why it matters
New entries near the top of LMArena WebDev · React move the React Web Apps race on AIModelRace.
GPT-6 Sol - Sep 13New #1
Claude Opus 5 takes #1 on LMArena Text · Life, Physical & Social Science
On the LMArena Text · Life, Physical & Social Science leaderboard published Sep 13, 2026, Claude Opus 5 moved from #2 to #1 with 1531, ahead of Claude Fable 5.1 (1526).
Why it matters
LMArena Text · Life, Physical & Social Science is the source for the Science Q&A race on AIModelRace, so the race leader follows it.
Opus 5Fable 5.1#2 - Sep 13New entries
Claude Fable 5.1 debuts at #2 on LMArena Vision
Claude Fable 5.1 appeared on the LMArena Vision leaderboard for the first time on Sep 13, 2026, placing #2 with 1322.
Why it matters
New entries near the top of LMArena Vision move the Image Understanding race on AIModelRace.
Fable 5.1#2 - Sep 13New entries
Claude Fable 5.1 debuts at #2 on LMArena Document
Claude Fable 5.1 appeared on the LMArena Document leaderboard for the first time on Sep 13, 2026, placing #2 with 1513.
Why it matters
New entries near the top of LMArena Document move the Documents & Charts race on AIModelRace.
Fable 5.1#2 - Sep 13New entries
Muse Spark 1.3 debuts at #5 on LMArena Text · Coding
Muse Spark 1.3 appeared on the LMArena Text · Coding leaderboard for the first time on Sep 13, 2026, placing #5 with 1516.
Why it matters
New entries near the top of LMArena Text · Coding move the Coding Q&A race on AIModelRace.
Spark 1.3#6 - Sep 13New entries
Muse Spark 1.3 debuts at #4 on LMArena Text · Non-English
Muse Spark 1.3 appeared on the LMArena Text · Non-English leaderboard for the first time on Sep 13, 2026, placing #4 with 1489.
Why it matters
New entries near the top of LMArena Text · Non-English move the Multilingual race on AIModelRace.
Spark 1.3#6 - Sep 13Big moves
Claude Opus 4.8 climbs from #15 to #9 on LMArena Document
On the LMArena Document leaderboard published Sep 13, 2026, Claude Opus 4.8 rose 6 places to #9 (1475).
Why it matters
Large single-update moves usually follow a model update or a wave of new votes.
Opus 4.8 - Sep 11New #1
Claude Opus 4.6 takes #1 on LMArena Text · Multi-Turn
On the LMArena Text · Multi-Turn leaderboard published Sep 11, 2026, Claude Opus 4.6 moved from #2 to #1 with 1512, ahead of Gemini 3.8 Flash (1510).
Why it matters
LMArena Text · Multi-Turn is the source for the Conversation race on AIModelRace, so the race leader follows it.
Opus 4.63.8 Flash#4 - Sep 11New entries
Claude Fable 5.1 debuts at #4 on LMArena Text · Math
Claude Fable 5.1 appeared on the LMArena Text · Math leaderboard for the first time on Sep 11, 2026, placing #4 with 1521.
Why it matters
New entries near the top of LMArena Text · Math move the Math Chat race on AIModelRace.
Fable 5.1#2 - Sep 11Big moves
GLM-5.3-Flash climbs from #24 to #7 on LMArena Text · Math
On the LMArena Text · Math leaderboard published Sep 11, 2026, GLM-5.3-Flash rose 17 places to #7 (1507).
Why it matters
Large single-update moves usually follow a model update or a wave of new votes.
GLM-5.3 Flash#14 - Sep 11Big moves
GLM-5.3 climbs from #22 to #10 on LMArena Text · Multi-Turn
On the LMArena Text · Multi-Turn leaderboard published Sep 11, 2026, GLM-5.3 rose 12 places to #10 (1485).
Why it matters
Large single-update moves usually follow a model update or a wave of new votes.
GLM-5.3 - Sep 8New entries
GPT-6 Astra debuts at #2 on LMArena Code Agent
GPT-6 Astra appeared on the LMArena Code Agent leaderboard for the first time on Sep 8, 2026, placing #2 with +12.5 points.
Why it matters
New entries near the top of LMArena Code Agent move the Agentic Coding race on AIModelRace.
GPT-6 Astra#8 - Sep 8New entries
GPT Image 2.5 Sunburst debuts at #1 on LMArena Text-to-Image · Photorealistic
GPT Image 2.5 Sunburst appeared on the LMArena Text-to-Image · Photorealistic leaderboard for the first time on Sep 8, 2026, placing #1 with 1423.
Why it matters
New entries near the top of LMArena Text-to-Image · Photorealistic move the Photoreal race on AIModelRace.
Image 2.5 Sunburst#1 - Sep 8New entries
GPT Image 2.5 Flare debuts at #2 on LMArena Text-to-Image · Photorealistic
GPT Image 2.5 Flare appeared on the LMArena Text-to-Image · Photorealistic leaderboard for the first time on Sep 8, 2026, placing #2 with 1406.
Why it matters
New entries near the top of LMArena Text-to-Image · Photorealistic move the Photoreal race on AIModelRace.
Image 2.5 Flare - Sep 8New entries
GPT Image 2.5 Sunburst debuts at #1 on LMArena Text-to-Image · Art
GPT Image 2.5 Sunburst appeared on the LMArena Text-to-Image · Art leaderboard for the first time on Sep 8, 2026, placing #1 with 1390.
Why it matters
New entries near the top of LMArena Text-to-Image · Art move the Illustration & Art race on AIModelRace.
Image 2.5 Sunburst#1 - Sep 8New entries
GPT Image 2.5 Sunburst debuts at #1 on LMArena Text-to-Image · Cartoon
GPT Image 2.5 Sunburst appeared on the LMArena Text-to-Image · Cartoon leaderboard for the first time on Sep 8, 2026, placing #1 with 1440.
Why it matters
New entries near the top of LMArena Text-to-Image · Cartoon move the Cartoon & Anime race on AIModelRace.
Image 2.5 Sunburst#1
Generated from the LMArena leaderboard dataset (lmarena-ai/leaderboard-dataset, CC BY 4.0) on each data refresh. Ranks in the titles are by rating among all models on that board; ranks on chips are current standings in each model's primary race on this site.