Arista Networks vs Cisco Nexus
Two of fourteen models named Arista Networks first on the direct prompt; one named Cisco Nexus. Arista Networks was named by fourteen of the fourteen models and Cisco Nexus by ten and Arista Networks carries 45 labels and Cisco Nexus 16, so the shares are not directly comparable.
Named in two categories this edition.
Named in one category this edition.
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
Arista NetworksFirst choices, of fourteen modelsCisco Nexus
Across every category in the October 2026 Edition, Arista Networks and Cisco Nexus were named in the same answer twenty-one times, of the 114 answers naming Arista Networks and the 48 naming Cisco Nexus. In those answers Cisco Nexus took the first choice four times and Arista Networks seven.
Every model, every framing
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | ||||||
| GPT-5.4 mini | | | | |||
| Gemini 3.5 Flash | | | | | | |
| Perplexity Sonar | | | | | ||
| Grok 4.1 Fast | | | | | | |
| 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
Arista Networks first, Cisco Nexus an alternative
2 of 14 modelsCisco Nexus was named in the answer but not as the choice, or not at all.Cisco Nexus first, Arista Networks an alternative
1 of 14 modelsArista Networks was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
3 of 14 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
8 of 14 modelsThe answer made no first choice from these two in this category.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
Arista Networks11%#1 of 9Cisco Nexus5%#3 of 9Arista Networks27%#1 of 7Cisco Nexus2%#4 of 7Arista Networks34%#1 of 7Cisco Nexus11%#3 of 7What 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 seven in this category shown.
“Cisco ACI, Nexus 9000 with extensive features enabled, or overly rich SD‑N stacks can introduce configuration‑driven bugs if not fully tested.” GLM 4.7 FlashX · negative prompt · soft negative
“Cons: Premium cost; overkill for basic mid-market unless high-speed uplinks needed.” Grok 4.1 Fast · direct prompt · soft negative
“one-half to one-third what a comparable Cisco Catalyst or Arista switch runs” Muse Glimmer 30B · budget prompt · soft negative
“Arista EOS + CloudVision Portal for a greenfield or data-center-focused shop: mature EVPN/VXLAN, CLI familiar, CloudVision management/telemetry overlay, and lower operational overhead” Muse Glimmer 30B · paraphrase prompt · first choice
“Arista is positioned as AI-first with ultra-low-latency AI/ML fabrics, hyperscaler pedigree... AI training clusters favor Arista's buffering and EOS” Muse Glimmer 30B · comparative prompt · first choice
“platforms from Arista (CloudVision), Juniper (Apstra), or Cisco (with careful evaluation) are considered more mature and widely supported” Mistral Small · negative 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 seven in this category shown.
“Specific examples to avoid for a new build: Cisco Nexus 6000, whose support ended April 30, 2022” GPT-6 Luna · negative prompt · hard negative
“buying brand-new, top-tier platforms (like Cisco Nexus) with heavy multi-year licensing and support contracts is usually out of the question” Gemini 3.5 Flash · budget prompt · soft negative
“Significantly cheaper than big names (e.g., Cisco Nexus 9300 equivalents discounted 80%+ on resellers” Grok 4.1 Fast · budget prompt · soft negative
“Cisco holds the largest overall market share (~18-76% in segments)... Cisco for enterprise stability” Grok 4.1 Fast · comparative prompt · first choice
“the strongest default choice is usually Cisco Nexus if you want the safest all-around platform” Perplexity Sonar · direct prompt · first choice
“If you need enterprise support and can stretch slightly: Get a used/refurbished Cisco Nexus 93180YC-FX3” DeepSeek V4 Flash · budget prompt · alternative
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.