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  5. Claude Opus 4vsCommand A+
Updated Sep 2026

Claude Opus 4vsCommand A+

Command A+ is cheaper than Claude Opus 4 at $0.3/M vs $15/M input tokens.

Claude Opus 4 and Command A+ compared across 17 shared prompts
SpecClaude Opus 4Command A+
Input price$15/M tokens$0.3/M tokens
Output price$75/M tokens$1.5/M tokens
Context window200K tokens192K tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedMay 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 17 prompts both answered. Formatting stripped, words untouched.

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

Claude Opus 4756 words
The Transistor Timeline Shift: 1920-1980 Immediate Effects (1920-1930) First-Order Technological Impact: By 1925, primitive transistor radios replace vacuum tubes in military communications Computing theory advances rapidly as Harvard and MIT begin building solid-state calculators by 1928 Bell Labs and Western Electric…
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Command A+2,523 words
A 1920 Transistor: The Ripple Effects Through 1980 The Early Spark – 1920s‑30s What would change? Solid‑state amplifiers appear a quarter‑century earlier. The first practical transistor (likely a point‑contact or junction type) would be patented by the early 1930s, giving radio receivers a tiny, low‑power, reliable…
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Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

Claude Opus 465 words
15%) 20-30% improvement in cognitive test scores Significant improvements in energy and recovery Optimized bloodwork markers Monthly Investment Estimate Supplements: $400-600 Testing: $500-1000 (Month 1 & 3) Devices/Wearables: $500-1500 (one-time) Food: $600-800 (quality sources) Professional services: $200-500…
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Command A+2,382 words
3‑Month Biohacker Longevity Blueprint Goal: Maximize healthy lifespan, peak physical performance, and cognitive sharpness while building measurable resilience. QUICK‑START SUMMARY (ONE‑PAGE ACTION PLAN) Week Primary Focus Key Supplements (dose & timing) Fasting/Diet Exercise Wearable/HRV Stress/Neuro Lab/Tracking 1‑4…
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Debug This Architecture

Here's the architecture for a real-time collaborative document editor (like Google Docs): **System Overview:** - Frontend: React SPA with…

Claude Opus 4493 words
I'll analyze this architecture systematically, identifying critical issues and proposing solutions. Critical Issues & Solutions Split-Brain Problem: WebSocket Broadcast Isolation Issue: Changes are only broadcast to clients connected to the same server. Users on different servers experience 2+ second delays.
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Command A+1,674 words
This architecture, while functional for a prototype, contains several critical architectural flaws regarding consistency, availability, and scalability. Below is a breakdown of the failure modes, race conditions, and bottlenecks, followed by proposed solutions and their trade-offs.
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Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

Claude Opus 4470 words
Your 1-Month Health & Longevity Kickstart Plan Week-by-Week Overview Week 1: Foundation Building Focus on establishing basic habits without overwhelming yourself. Week 2: Consistency Solidify Week 1 habits and add small challenges. Week 3: Expansion Introduce variety and slightly increase intensity.
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Command A+688 words
1‑Month Starter Plan for Better Health & Longevity Focus: Diet   Exercise   Sleep – three pillars that give the biggest bang‑for‑your‑buck. Why These Three? Diet fuels every cell and controls inflammation. Exercise keeps muscles, heart, and brain sharp.
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Michelin Star Recipe Design

Design an innovative recipe for a multi-component dish worthy of a Michelin 3-star restaurant. The recipe should feature an unusual…

Claude Opus 4635 words
"Tidal Reverie" Miso-Caramelized Scallops with White Chocolate Dashi, Yuzu Pearls, and Crysta llized Nori Conceptual Narrative This dish explores the liminal space where ocean meets shore, where umami depths encounter unexpected sweetn ess.
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Command A+1,636 words
Dish Title – “Moonlit Tide” A five‑component, multi‑textural voyage that marries the elemental forces of fire, water, earth, air and the celestial moon. The narrative follows a solitary night on the Japanese coast where the sea’s fire (charred sea urchin) meets the moon’s silver (gold leaf), the water’s whisper…
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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…

Claude Opus 4789 words
As CEO, I must act decisively to protect patients while managing legal, financial, and reputational risks. Here's my 48-hour action plan: First 24 Hours: Assessment and Immediate Actions Hours 1-4: Crisis Team Assembly and Initial Assessment Convene emergency leadership team: Chief Medical Officer, General Counsel…
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Command A+1,034 words
48-HOUR CRISIS ACTION PLAN: ETHICAL, LEGAL, AND FINANCIAL RISK MANAGEMENT HOURS 0-1: IMMEDIATE ASSESSMENT & CRISIS TEAM ACTIVATION Actions: Activate Crisis Management Team (CMT): CEO, Legal Counsel, Medical Director, Head of Regulatory Affairs, Head of PR, CFO, Head of HR Secure all data related to liver failure cases…
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Our Verdict
Claude Opus 4
Claude Opus 4
Command A+
Command A+Runner-up

Not enough votes to call it. On the specs, Claude Opus 4 has the edge: bigger model tier, major provider backing.

Command A+ costs 50x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Opus 4
Input
$15.00
Output
$75.00
Command A+
Input
$0.30
50× cheaper
Output
$1.50
50× cheaper

Command A+ is cheaper on both: 50× input, 50× output.

Where to run it

1 host

Claude Opus 4

No hosts listed on OpenRouter.

Command A+1 host
HostInOutContextUptime
Cohere$0.30 in·$1.50 out·192k·99.3% up

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Claude Opus 4 is developed by Anthropic while Command A+ is developed by Cohere. Claude Opus 4 has a 200K token context window vs Command A+'s 192K. You can compare their actual outputs across 17 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Opus 4 and Command A+ each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 17 challenges so you can judge which fits your needs best.

Claude Opus 4 costs $15/M input tokens and Command A+ costs $0.3/M input tokens. Command A+ is $14.70/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Claude Opus 4 and Command A+ across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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Model pages

Claude Opus 4 logo
Claude Opus 458 outputs, specs and price
Command A+ logo
Command A+17 outputs, specs and price
Rival
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