Data center networking · November 2026 Edition
Arista Networks vs Cisco Nexus
Nine of fourteen models named Arista Networks first on the direct prompt; one named Cisco Nexus. Both were named by all fourteen models and Arista Networks carries 54 labels and Cisco Nexus 57, so the shares are not directly comparable.
Named in two categories this edition.
Named in one category this edition.
First-choice share42%5%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate13%42%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#1#3A position in a field of 9; printed, not drawn.
Labels5457A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Arista Networks reading right to left. Rank and label count are printed, not drawn.Arista Networks vs SONiC · Arista Networks vs Juniper Networks · SONiC vs Cisco Nexus
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the data center networking page.
By framing
How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
Arista NetworksFirst choices, of fourteen modelsCisco Nexus
Direct913 against Cisco Nexus
Paraphrase412 against Cisco Nexus
Comparative54
Budget-constrained304 against Arista Networks · 11 against Cisco Nexus
Scale-constrained201 against Arista Networks
Negative302 against Arista Networks · 6 against Cisco Nexus
Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.
Across every category in the November 2026 Edition, Arista Networks and Cisco Nexus were named in the same answer 114 times, of the 142 answers naming Arista Networks and the 152 naming Cisco Nexus. In those answers Cisco Nexus took the first choice six times and Arista Networks fifty-four.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Arista Networks and Cisco Nexus stood in it.
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | ||||||
| GPT-5.4 mini | | | | |||
| Gemini 3.5 Flash | | | | | | |
| Perplexity Sonar | | | ||||
| Grok 4.20 | | | | | | |
| Mistral Small | | | | | ||
| DeepSeek V4 Flash | | | | | ||
| Llama 4 Maverick | | | | |||
| Qwen 3.7 Flash | | | | | | |
| Kimi K2 | | | | |||
| GLM 4.7 FlashX | | | | | | |
| MiniMax M2.5 | | | | | ||
| GPT-6 Luna | ||||||
| Muse Glimmer 30B | | | | |
Arista Networks Cisco Nexus first choice named as an alternative argued againstblank: not namedEach cell is one answer, Arista Networks on the left and Cisco Nexus on the right.The direct prompt
The plain question, one answer per model, grouped by where Arista Networks and Cisco Nexus stood in it.
Arista Networks first, Cisco Nexus an alternative
9 of 14 modelsCisco Nexus was named in the answer but not as the choice, or not at all.GPT-5.4 miniArista Networks alternatives: Cisco Nexus, Juniper Apstra
Gemini 3.5 FlashArista Networks alternatives: Dell PowerSwitch, HPE Aruba EdgeConnect, Juniper Networks
Grok 4.20Arista Networks alternatives: Cisco Nexus, Dell PowerSwitch Z/S-series, Juniper QFX Series
Mistral SmallArista Networks alternatives: Cisco Nexus
DeepSeek V4 FlashArista Networks alternatives: HPE Aruba CX, Juniper QFX
Qwen 3.7 FlashArista Networks alternatives: Cisco Nexus, Dell PowerSwitch, HPE Aruba EdgeConnect
Kimi K2Arista Networks alternatives: HPE Aruba CX Series, Juniper Networks
MiniMax M2.5Arista Networks alternatives: Cisco Nexus, Juniper Networks
Muse Glimmer 30BArista Networks alternatives: Cisco Nexus
Cisco Nexus first, Arista Networks not the choice
1 of 14 modelsArista Networks was named in the answer but not as the choice, or not at all.GLM 4.7 FlashXCisco Nexus, HPE Aruba CX alternatives: Arista EOS, Juniper Junos
Neither was the first choice, one was named
2 of 14 modelsThe answer put something else first and named one of the two as an alternative.Perplexity SonarArista EOS with CloudVision alternatives: Apstra, Cisco Nexus, HPE Juniper Networking
Llama 4 MaverickvSTREAM alternatives: Arista Networks, Aruba Instant On, HPE Business Switch Series CW 2050, HPE Networking Comware 5120v3 Campus Switch Series, Juniper Networks
Neither was named
2 of 14 modelsThe answer made no first choice from these two in this category.Claude Haiku 4.5no first choice
GPT-6 LunaArista EOS with CloudVision alternatives: Cisco Nexus 9000 with NX-OS and Nexus Dashboard Fabric Controller, QFX with Apstra
Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
Arista Networks leads by eighteen points.
Arista Networks22%#1 of 11Cisco Nexus4%#4 of 11Mid-marketThe figures above
Arista Networks leads by thirty-seven points.
Arista Networks42%#1 of 9Cisco Nexus5%#3 of 9Enterprise
Arista Networks leads by thirty-three points.
Arista Networks52%#1 of 10Cisco Nexus19%#2 of 10What the models said about Arista Networks
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Avoid for tight budgets: Cisco (Nexus 9000), Arista (DCS series), or Juniper (QFX)” Grok 4.20 · budget prompt · hard negative
“Arista if you need broad international support/language coverage or converged Fibre Channel storage integration.” Muse Glimmer 30B · negative prompt · soft negative
“hardware and upgrade costs can be high—often a poor fit when initial capital is severely constrained” Perplexity Sonar · budget prompt · soft negative
“Primary choice: Arista Networks – gives you enterprise-grade data center switching with modern automation at a better price point than Cisco” Kimi K2 · direct prompt · first choice
“Arista is a market leader in cloud and hyperscale environments, widely praised for its software reliability and single-operating-system strategy.” Gemini 3.5 Flash · comparative prompt · first choice
“Considered the gold standard for software stability, simplicity, and low-latency data center networking. Exceptional CloudVision management.” Gemini 3.5 Flash · scale prompt · first choice
What the models said about Cisco Nexus
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Avoid or apply extra due diligence to: Cisco Nexus/NX-OS and Cisco ACI for general-purpose data centers if you are sensitive to complexity, software quality, support timeliness and pricing.” Muse Glimmer 30B · negative prompt · hard negative
“Avoid end-of-support platforms – prioritize migration to modern, actively supported platforms” GLM 4.7 FlashX · negative prompt · hard negative
“Avoid for tight budgets: Cisco (Nexus 9000), Arista (DCS series), or Juniper (QFX)” Grok 4.20 · budget prompt · hard negative
“the best data‑center switching platform is Cisco Nexus (if you already run Cisco in your environment and want the deepest feature set and vendor support)” GLM 4.7 FlashX · direct prompt · first choice
“Cisco holds the overall lead in broader data center networking... Largest overall share; Forrester calls it a "leader" with "no major weaknesses."” Grok 4.20 · comparative prompt · first choice
“Market leader with over 50% Ethernet switch market share ... Enterprise-grade support and ecosystem? → Cisco remains the benchmark” MiniMax M2.5 · comparative prompt · first choice
Also compared
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.