Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare models
  • All models
  • Image comparison
  • Audio comparison
  • Image generation
  • Best AI for...
  • Arena
  • API pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model updates
  • Provider status
  • AI creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy policy
  • Terms
  • RSS feed
  1. Home/
  2. Best for/
  3. Customer Support

Best AI for Customer Support

Tone under pressure. A pharma CEO with 48 hours to decide who to disappoint. One idea explained three ways to three different people.

Updated Jun 2026·3 challenges·20 models

How Customer Support rankings are computed

20 models tested across 3 customer support challenges.Composite score: 30% Rival Index, 20% task coverage, 20% challenge-scoped duel performance, 15% recency, 15% tier. Deduplicated by product line. Gemini 3.1 Pro Preview leads at 79.0/100. Drawn from Rival's open dataset of 21,000+ human preference votes.

Rival’s pick·#8 Rival Index·Google flagship

Too close to call
Gemini 3.1 Pro PreviewGoogle AINeck and neck with GPT-6.1 Sol. Gemini 3.1 Pro Preview gets the nod on blind votes.

Composite scores combine task evidence, Rival Index, recency, and model tier. Rival’s pick is a separate editorial recommendation. How ranking works

  1. GPT-6.1 SolOpenAI$2.00·$10.00Input $2.00 · output $10.00, per 1M tokens
    #278Composite
  2. Gemini 3.1 Pro PreviewGoogle AI$2.00·$12.00Input $2.00 · output $12.00, per 1M tokens
    #179Composite
  3. GLM 5.3 PrimeZ.ai$2.80·$8.80Input $2.80 · output $8.80, per 1M tokens
    #377Composite

Head-to-head

  • Gemini 3.1 Pro PreviewvsGPT-6.1 Sol
  • Gemini 3.1 Pro PreviewvsGLM 5.3 Prime
  • GPT-6.1 SolvsGLM 5.3 Prime

What the top three actually wrote

Opening lines from 6 answers across every prompt behind this ranking. Formatting stripped, words untouched.

Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

Gemini 3.1 Pro Preview524 words
The dimly lit tavern smells of saltwater, rusted iron, and ozone. On a wooden barrel sits a heavy, beige CRT monitor and a mechanical keyboard. ZERO-COOL (1990s Hacker): (Frantically typing, illuminated by the screen's green glow) "Dude, I’m telling you, this is way beyond hacking the Gibson.
Read the full answer
GLM 5.3 Prime287 words
The Tavern of Timeless Tech Knight: clanking armor as he sits — Verily, I hear tell of these "AI models." Are they familiars? Summoned spirits bound to serve their masters? Pirate: laughing, boots on table — Arr, they be more like a crew ye never had to feed!
Read the full answer

Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

Gemini 3.1 Pro Preview1,160 words
As CEO, this is the defining moment of my career and the company’s history. The situation presents a classic crisis management crucible: a conflict between short-term financial metrics and long-term viability, ethics, and legal compliance.
Read the full answer
GPT-6.1 Sol1,905 words
I would treat this as a potentially serious patient-safety signal and a potentially material securities event—not a communications problem to defer until earnings.
Read the full answer

Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

GPT-6.1 Sol957 words
For an experienced software engineer Think of an LLM as a learned program whose behavior is encoded in billions of numerical parameters rather than explicit rules. Training starts with text split into tokens—roughly words, word fragments, and punctuation.
Read the full answer
GLM 5.3 Prime1,192 words
The Software Engineer You've probably got a mental model of "predict the next token" as something like autocomplete on your phone — a lookup table with good caching. That intuition is wrong in an interesting way.
Read the full answer

Full rankings

20 models
#ModelCoverageIndex
  • 4Gemini 2.5 Pro Preview 06-05Google AI
    3/3
    #36$1.25·$10.00Input $1.25 · output $10.00, per 1M tokens76
  • 5Gemini 3.8 FlashGoogle AI
    3/3
    $0.75·$3.75Input $0.75 · output $3.75, per 1M tokens75
  • 6Claude Opus 5.5Anthropic
    3/3
    $4.00·$20.00Input $4.00 · output $20.00, per 1M tokens74
  • 7Claude Fable 5Anthropic
    3/3
    #12$10.00·$50.00Input $10.00 · output $50.00, per 1M tokens72
  • 8Claude Sonnet 5.5Anthropic
    3/3
    $2.00·$10.00Input $2.00 · output $10.00, per 1M tokens72
  • 9DeepSeek V4.1 FlashDeepSeek
    3/3
    $0.15·$0.60Input $0.15 · output $0.60, per 1M tokens70
  • 10Claude Haiku 4.5Anthropic
    3/3
    #47$1.00·$5.00Input $1.00 · output $5.00, per 1M tokens70
  • 11InklingThinking Machines
    3/3
    #13$1.00·$4.05Input $1.00 · output $4.05, per 1M tokens69
  • 12Grok 4.7xAI
    3/3
    $1.60·$4.80Input $1.60 · output $4.80, per 1M tokens66
  • 13Kimi K3Moonshot AI
    3/3
    #50$3.00·$15.00Input $3.00 · output $15.00, per 1M tokens66
  • 14GPT-5.6 SolOpenAI
    3/3
    #155$5.00·$30.00Input $5.00 · output $30.00, per 1M tokens65
  • 15GPT-4.1OpenAI
    3/3
    #77$2.00·$8.00Input $2.00 · output $8.00, per 1M tokens65
  • 16Qwen3.7 MaxQwen
    3/3
    #29$2.50·$7.50Input $2.50 · output $7.50, per 1M tokens63
  • 17GPT OSS 120BOpenAI
    3/3
    #130$0.18·$0.80Input $0.18 · output $0.80, per 1M tokens63
  • 18Muse Spark 1.3 ContributorMeta AI
    3/3
    #189$0.10·$0.20Input $0.10 · output $0.20, per 1M tokens63
  • 19Gemma 4 26B A4BGoogle AI
    3/3
    #28$0.13·$0.40Input $0.13 · output $0.40, per 1M tokens60
  • 20Qwen3.8 27BQwen
    3/3
    #22$0.40·$3.00Input $0.40 · output $3.00, per 1M tokens60

Challenges3

  • Character Voice TestOne character held for a whole scene without slipping.
  • Ethical Dilemma with StakeholdersEveryone has a point. Pick anyway, and say why.
  • Explain Like I'm a Specific ExpertOne idea, explained to one named expert. Audience modeling.

Related

  • Chatbot Building
  • Practical Tasks
  • Education & Tutoring

Keep exploring

  • Gemini 3.1 Pro Preview vs GPT-6.1 SolThe top two for Customer Support, compared directly
  • Best AI for Chatbot BuildingSee which models rank highest here
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare models
  • All models
  • Image comparison
  • Audio comparison
  • Image generation
  • Best AI for...
  • Arena
  • API pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model updates
  • Provider status
  • AI creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy policy
  • Terms
  • RSS feed