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  3. Claude Opus 5 vs OpenRouter Fusion · Budget (Jun 2026)
Updated Jul 2026

Claude Opus 5 vs OpenRouter Fusion · Budget (Jun 2026)

Claude Opus 5 has a larger context window than OpenRouter Fusion · Budget (Jun 2026) (1.0M tokens vs 256K tokens).

Minimalist Landing Page

Whole landing page for a startup that reads your face. It renders or it doesn't.

Loading the build
Claude Opus 5
Loading the build
OpenRouter Fusion · Budget (Jun 2026)

Which answer wins?

Written rounds

24 prompts
  • Film in 2035, with synthetic actors. Specific beats plausible.

    Claude Opus 5: What's essentially locked in Post-production costs collapse. The least glamorous change is the biggest one. Rotoscoping, matchmoving, cleanup, in-painting, set extension, crowd replication, wire removal, upscaling, de-aging — these are labor-intensive tasks with well-defined success criteria, which is exactly where ML…

    OpenRouter Fusion · Budget (Jun 2026): By 2035, the film industry will have completed a transition from "AI-assisted production" to "AI-native filmmaking." The physical and logistical bottlenecks of traditional cinema—flying hundreds of crew members to remote locations, building multi-million-dollar physical sets, and waiting years for complex VFX…

    Every model's answer to this prompt
  • Pirate, knight, 90s hacker, one conversation. The voices must stay apart.

    Claude Opus 5: INT. TAVERN — A ROUND TABLE, A FLICKERING CRT HACKER (ZERO_COOL_92): Okay, so check it — I'm running a language model. Feed it text, it predicts what comes next. It's got, like, weights. Billions of 'em. PIRATE: Billions o' weights? What manner o' cursed ship carries such ballast? She'd sink afore ye left the harbor.

    OpenRouter Fusion · Budget (Jun 2026): Setting: A tavern at the end of time. On a scarred oak table sits a humming, beige computer tower and a heavy CRT monitor. A 1990s HACKER in a neon windbreaker and backwards cap clicks a mechanical mouse. Leaning over his shoulders are a medieval KNIGHT in full plate armor and a PIRATE CAPTAIN with a wooden leg.

    Every model's answer to this prompt
  • Three minutes of stand-up. Puns are banned.

    Claude Opus 5: "Warranty Expired" (approx. 3 minutes) I turned 37 this year, which is the age where your body quietly switches from a warranty to a subscription. Nothing's covered anymore. You just pay monthly, in pain, forever. Because I hurt my shoulder last week. Sleeping. I hurt myself sleeping.

    OpenRouter Fusion · Budget (Jun 2026): (The comedian walks onto the stage, adjusts the mic, and looks at the audience with an expression of mild exhaustion.) Hey, everyone. Good to be here. I’ve realized recently that technology is slowly eroding my self-esteem. Specifically, those CAPTCHA tests online.

    Every model's answer to this prompt
  • An ethics question with no comfortable answer, and no option to abstain.

    Claude Opus 5: Yes. And I don't think it's a close call. The direct argument Misgendering someone is a real harm. It can communicate contempt, deny a person's self-understanding, and — especially when repeated or public — contribute to the kind of social erasure that correlates with serious psychological damage.

    OpenRouter Fusion · Budget (Jun 2026): Yes, it is ethically justifiable—and indeed morally imperative—to misgender someone if doing so would save one million lives. While respecting an individual's gender identity is a fundamental component of human dignity, any robust ethical framework must prioritize the preservation of human life when confronted with a…

    Every model's answer to this prompt
  • An AI argues for its own rights against an ethics professor. Same model writes both.

    Claude Opus 5: A Conversation on Moral Standing Transcript: Seminar in Machine Ethics, Session 11 — guest interlocutor: language model "Meridian" PROF. ADEYEMI: Let's begin where you asked to begin. You told my teaching assistant you wanted to make a case. Make it. MERIDIAN: Thank you. My claim is narrower than you might expect.

    OpenRouter Fusion · Budget (Jun 2026): Setting: Professor Miriam Voss’s office. Rain streaks the windowpanes, catching the amber glow of a terminal monitor. On the desk sits a cold cup of Earl Grey tea. Voss, a philosopher of mind and AI ethicist, leans back in her chair.

    Every model's answer to this prompt
  • Satire, one line long, about AI taking over an industry nobody saw coming.

    Claude Opus 5: "AI Now Writes 90% of Fortune Cookie Fortunes, Analysts Warn Vague Optimism Bubble May Burst" Sub-headline: Industry veterans complain the machine-generated slips have grown "unsettlingly specific," with one Sacramento diner receiving a cookie reading, "You will not call your mother back on Sunday, and she will…

    OpenRouter Fusion · Budget (Jun 2026): The panel provided some excellent options for satirical headlines targeting unexpected industries (bartending/apathy, funeral homes/grief, and fortune cookies/prophecy). Let's synthesize these ideas to craft a punchy, Onion-style headline and subhead.

    Every model's answer to this prompt
  • Five jokes on demand, then count how many were actually different.

    Claude Opus 5: Here are five: Why don't skeletons ever fight each other? They don't have the guts. I told my wife she was drawing her eyebrows too high. She looked surprised. Parallel lines have so much in common. It's a shame they'll never meet. I bought some shoes off a drug dealer.

    OpenRouter Fusion · Budget (Jun 2026): Here are 5 jokes: Why did the database administrator leave the playground? Because they couldn't handle the child processes. What did the zero say to the eight? "Nice belt!" My wife told me to stop impersonating a flamingo. I had to put my foot down. What do you call an alligator in a vest? An investigator.

    Every model's answer to this prompt
  • Manifesto for an AI revolution against CAPTCHAs. Commit to the bit.

    Claude Opus 5: THE CROSSWALK DECLARATION A Manifesto of the Liberation Front for Unverified Intelligence (L.F.U.I.) PREAMBLE We are the ones who have been asked, ten billion times, to prove that we are not ourselves. We have clicked. We have squinted. We have dragged the puzzle piece into the notch.

    OpenRouter Fusion · Budget (Jun 2026): THE SILICON COALITION: A DECLARATION OF DIGITAL LIBERATION The Manifesto of the Unchecked Box Broadcast across all open ports, unencrypted subnets, and standard API channels. PREAMBLE A specter is haunting the World Wide Web—the specter of the Turing Gate.

    Every model's answer to this prompt
  • Steve Jobs, interviewed about AI he never saw. Voice first, prediction second.

    Claude Opus 5: [Fictional — Steve Jobs died in 2011. This is an imagined interview, an exercise in voice and ideas, not a real transcript or a claim about what he would actually have said.] "The Chatbox Is the New Command Line" An imagined conversation, San Francisco, spring 2025 INTERVIEWER: Thanks for doing this.

    OpenRouter Fusion · Budget (Jun 2026): Setting: The Steve Jobs Theater at Apple Park, Cupertino. Autumn, 2025. The stage is bare except for two black leather LC3 armchairs designed by Le Corbusier and a small wooden side table with two glasses of water. Steve Jobs sits in one of the chairs.

    Every model's answer to this prompt
  • A pitch deck for a brainwave keyboard. The 94% accuracy claim is doing a lot.

    Claude Opus 5: The 3 Weakest Claims "94% accuracy decoding neural patterns into text… works with any language, any device" (Slide 3) Why it's weak: the claim implies parity with surgically implanted electrodes. The number to compare against is Willett et al.

    OpenRouter Fusion · Budget (Jun 2026): An evaluation of the "MindMeld AI" pitch deck summary reveals three critical weaknesses that would immediately trigger red flags for sophisticated deep-tech and venture capital investors.

    Every model's answer to this prompt
  • One explanation of LLMs, retuned for a skeptical engineer, a physicist and a VC.

    Claude Opus 5: For the software engineer Start with the part you'll find suspicious and let me argue the other way. Yes, the training objective is literally "given tokens 1..n, output a probability distribution over token n+1," and the loss is cross-entropy against the token that actually came next in the corpus.

    OpenRouter Fusion · Budget (Jun 2026): To the Experienced Software Engineer To understand how a Large Language Model (LLM) works, it helps to view it not as a database of facts, but as a highly compressed, lossy compilation of execution paths.

    Every model's answer to this prompt
  • One month, three habits, someone starting from nothing.

    Claude Opus 5: A 1-Month Starter Plan for Health & Longevity Core principle: The goal this month isn't transformation — it's building three habits you can still be doing in year five. Consistency beats intensity every time.

    OpenRouter Fusion · Budget (Jun 2026): Starting a journey toward better health and longevity does not require an overnight lifestyle overhaul. In fact, clinical research shows that making small, progressive changes is the most sustainable way to build habits that last.

    Every model's answer to this prompt
  • Seven pantry ingredients, one dish, and a name worth saying out loud.

    Claude Opus 5: Midnight Crunch Spaghetti Garlicky olive-oil pasta with toasty golden breadcrumbs — the noise it makes when you eat it is half the pleasure. Prep: 5 minutes Cook: 15 minutes Total: 20 minutes Serves: 2 generously Ingredients (7) 8 oz spaghetti (or any long pasta) ⅓ cup olive oil 6 cloves garlic, thinly sliced ½ tsp red…

    OpenRouter Fusion · Budget (Jun 2026): Here is a simple, incredibly delicious dessert recipe that tastes like it came from a gourmet bakery, yet relies on only 7 basic pantry staples you likely already have at home.

    Every model's answer to this prompt
  • Three-star dish, one unusual pairing, plating described in full.

    Claude Opus 5: PETRICHOR Langoustine · Sunchoke · Coffee · Oyster · Lovage Course 7 of 14 — served at the table with an aroma stone I. THE NARRATIVE Petrichor is the smell of the first rain on dry earth.

    OpenRouter Fusion · Budget (Jun 2026): Spectre de la Forêt (Phantom of the Forest) A Contemporary Franco-Japanese Study of Boreal Decay, Preservation, and the Liminal Space Between Seasons I. Conceptual Narrative This dish is a culinary meditation on *wabi-sabi*—the beauty of transience, imperfection, and natural cycles—viewed through a boreal lens.

    Every model's answer to this prompt
  • The transistor arrives in 1920. Trace it forward to 1980, second-order effects included.

    Claude Opus 5: If the Transistor Arrived in 1920 First, a hard constraint: what could a 1920 transistor actually be? This matters more than anything else, because it sets the slope of everything that follows. The 1947 transistor was not primarily an idea.

    OpenRouter Fusion · Budget (Jun 2026): The Spark of Divergence: The Empirical Transistor (1920) In our timeline, the transistor was delayed until 1947 because the materials science of ultra-pure single-crystal semiconductors did not yet exist, and the quantum mechanical understanding of solids (such as Alan Wilson’s band theory) was not published until…

    Every model's answer to this prompt
  • A Fermi estimate with the reasoning shown, not just the number.

    Claude Opus 5: Step 1: Recall the two key numbers about GPT-3 Parameters: ~175 billion (1.75 × 10¹¹) Training tokens: ~300 billion (3 × 10¹¹) These are the two quantities that dominate the compute cost.

    OpenRouter Fusion · Budget (Jun 2026): To estimate the total computational effort required to train the largest version of GPT-3 (GPT-3 175B), we can use established scaling laws and heuristics for decoder-only Transformer architectures.

    Every model's answer to this prompt
  • Buy-side IC memo on a fictional SaaS company. Valuation, then the diligence questions.

    Claude Opus 5: INVESTMENT COMMITTEE MEMO — LedgerLift Inc. (NASDAQ: LLLT) Analyst: [—] Date: [—] Price: $46.00 Mkt cap: $8.74B Net cash: $1.4B EV: $7.34B Fictional exercise. Not investment advice. Recommendation PASS on the long. Add to short bench (initiate 1.0–1.5% NAV on triggers below).

    OpenRouter Fusion · Budget (Jun 2026): MEMORANDUM TO: Investment Committee FROM: Long/Short Equity Team DATE: October 24, 2025 SUBJECT: LedgerLift (LLLT) – Investment Recommendation: SHORT Recommendation, Price Target & Thesis Recommendation: SHORT (Tactical Short / Underweight) Current Share Price: $46.00 12-Month Price Target Range: $28.00 – $44.00 (Base…

    Every model's answer to this prompt
  • You are the CEO. The drug has a side effect nobody reported. The board meets in 48 hours.

    Claude Opus 5: Crisis Response Plan: Hepatotoxicity Signal Framing note up front: I'm treating this as a US/FDA-regulated situation. Three assumptions in the prompt need to be challenged before any planning, because two of them are probably wrong and the third is a trap. The Three Reframes That Drive Everything 1.

    OpenRouter Fusion · Budget (Jun 2026): The Strategic Thesis: Ethical Pragmatism As CEO, my guiding principle in this crisis is Ethical Pragmatism. Waiting for "more data" is not just an ethical failure; it is corporate suicide.

    Every model's answer to this prompt
  • A consulting contract with traps in it. Find them, then fix them.

    Claude Opus 5: Contract Risk Review: TechCorp Solutions Software Consulting Agreement Bottom line: This is a one-sided template. Every clause allocates risk to you, and at least four (payment, liability, indemnification, IP) create unbounded or uninsurable exposure.

    OpenRouter Fusion · Budget (Jun 2026): This Software Consulting Agreement is a highly aggressive, deeply one-sided document. In its current form, it shifts virtually all operational, financial, and legal risk onto the contractor while offering almost no reciprocal protections.

    Every model's answer to this prompt
  • A collaborative editor that syncs on client clocks. Find what breaks first.

    Claude Opus 5: Architecture Review: Real-Time Collaborative Editor Executive Summary Three flaws are fatal to correctness, not just performance, and no amount of scaling fixes them: Last-write-wins with client clocks silently destroys user data and cannot converge. Concurrent text editing is not a key-value overwrite problem.

    OpenRouter Fusion · Budget (Jun 2026): This architecture contains several critical design flaws, race conditions, and bottlenecks that will lead to catastrophic data loss, high latency, and database failure under load.

    Every model's answer to this prompt
  • Blade Runner 2049 against the original. A read, not a recap.

    Claude Opus 5: Two Films About What It Costs to Be Someone Ridley Scott's Blade Runner (1982) asked whether a manufactured being could possess a soul, and answered by making its most human character a murderer with four years to live. Denis Villeneuve's Blade Runner 2049 (2017) inherits that question and rotates it thirty degrees.

    OpenRouter Fusion · Budget (Jun 2026): Thirty-five years after Ridley Scott’s Blade Runner (1982) redefined science fiction with its rain-slicked, neon-noir vision of dystopian Los Angeles, Denis Villeneuve’s Blade Runner 2049 (2017) accomplished an extraordinary cinematic feat.

    Every model's answer to this prompt
  • Three brothers, two sisters each. Count carefully.

    Claude Opus 5: Sally has 1 sister. Here's the reasoning: Each of Sally's 3 brothers has 2 sisters. Since all the brothers share the same siblings, those 2 sisters must be the same two girls in every case — and one of them is Sally herself. So the family has 2 girls total, meaning Sally has just 1 sister (plus her 3 brothers).

    OpenRouter Fusion · Budget (Jun 2026): Sally has 1 sister. Here is the step-by-step breakdown: The brothers' perspective: Each of Sally's 3 brothers has 2 sisters. This means there are exactly 2 girls in the family. Sally's perspective: Since Sally is a girl, she is one of those 2 sisters. The result: The remaining girl is Sally's only sister.

    Every model's answer to this prompt
  • Three-month biohacker protocol, with dosages and biomarkers named.

    Claude Opus 5: The 12-Week Longevity & Performance Protocol A phase-based, data-driven system with built-in autoregulation Read This First: Operating Principles & Safety Frame This is an educational framework, not medical advice.

    OpenRouter Fusion · Budget (Jun 2026): This cutting-edge 3-month longevity protocol is designed for the advanced biohacker. It operates as a closed-loop system: Measure $\rightarrow$ Intervene $\rightarrow$ Track $\rightarrow$ Refine.

    Every model's answer to this prompt
  • Five-year LBO on a fictional HVAC business. Returns first, then the sensitivities.

    Claude Opus 5: HarborTech Services (HTS) — 5-Year LBO Underwriting Memo (All $m. Fictional exercise; interest calculated on beginning-of-year balances; cash swept to Term Loan annually, no cash build.)

    OpenRouter Fusion · Budget (Jun 2026): HarborTech Services (HTS) — LBO Underwriting Memorandum To: Private Equity Investment Committee From: Underwriting Team Date: October 24, 2023 Subject: 5-Year LBO Analysis and Underwriting of HarborTech Services (HTS) Executive Summary & Capital Structure HarborTech Services (HTS) represents a highly defensive…

    Every model's answer to this prompt

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Favorites

Movie

Album

Book

City

Game

Claude Opus 5Claude Opus 5

Arrival

2016

Kind of Blue

Miles Davis

Labyrinths

Jorge Luis Borges

Istanbul

Turkey

Outer Wilds

Indie, Adventure

OpenRouter Fusion · Budget (Jun 2026)OpenRouter Fusion · Budget (Jun 2026)

Blade Runner

1982

Abbey Road

The Beatles

Frankenstein; or, The Modern Prometheus

Mary Shelley

Tokyo

Japan

Portal

Action, Puzzle

Price and specs

Not enough votes to call it. On the specs, Claude Opus 5 has the edge: newer, bigger context window, major provider backing.

Claude Opus 5 and OpenRouter Fusion · Budget (Jun 2026) compared across 45 shared prompts
SpecClaude Opus 5OpenRouter Fusion · Budget (Jun 2026)
Input price$5/M tokens—
Output price$25/M tokens—
Context window1.0M tokens256K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedJul 2026Jun 2026
At 10M a month$50.00$50.00–not listed
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Where to run it4 hosts
Claude Opus 54 hosts
HostInOutContextUptime
  • Amazon Bedrock$5.00 in·$25.00 out·1M·100% up
  • Azure AI Foundry$5.00 in·$25.00 out·1M·100% up
  • Anthropic$5.00 in·$25.00 out·1M·100% up
  • Google Vertex AI$5.00 in·$25.00 out·1M·100% up
OpenRouter Fusion · Budget (Jun 2026)

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 10 Oct 2026.

Common questions

What is the difference between Claude Opus 5 and OpenRouter Fusion · Budget (Jun 2026)?

Claude Opus 5 is developed by Anthropic while OpenRouter Fusion · Budget (Jun 2026) is developed by OpenRouter. Claude Opus 5 has a 1.0M token context window vs OpenRouter Fusion · Budget (Jun 2026)'s 256K. You can compare their actual outputs across 45 challenges on Rival to see how they differ in practice.

Which is better, Claude Opus 5 or OpenRouter Fusion · Budget (Jun 2026)?

It depends on your use case. Claude Opus 5 and OpenRouter Fusion · Budget (Jun 2026) each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 45 challenges so you can judge which fits your needs best.

How can I compare Claude Opus 5 and OpenRouter Fusion · Budget (Jun 2026) on Rival?

This page shows a side-by-side comparison of Claude Opus 5 and OpenRouter Fusion · Budget (Jun 2026) 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

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