Claude Opus 4.5 is the newer model, released after GPT-5.
Whole landing page for a startup that reads your face. It renders or it doesn't.
Which answer wins?
Three-month biohacker protocol, with dosages and biomarkers named.
Claude Opus 4.5: COMPREHENSIVE 3-MONTH LONGEVITY OPTIMIZATION PROTOCOL Advanced Biohacker's Blueprint for Peak Performance & Healthspan Extension TABLE OF CONTENTS Pre-Protocol Assessment & Baseline Establishment Month 1: Foundation & Metabolic Flexibility Month 2: Optimization & Hormetic Stress Month 3: Integration & Peak Performance…
GPT-5: Important note: The following is an intensive, experimental plan intended for healthy adults with physician oversight. It is not medical advice. Discuss all supplements, fasting, heat/cold exposure, and any prescription considerations with your clinician, especially if you have cardiovascular, metabolic, thyroid…
Pirate, knight, 90s hacker, one conversation. The voices must stay apart.
Claude Opus 4.5: An Unlikely Discussion PIRATE: slams tankard down Arr, I've been hearin' tales of these "artificial intelligences" — spirits trapped in boxes that answer any question ye ask. Sounds like a sea witch's trickery to me! KNIGHT: Indeed, 'tis most curious. My squire spoke of such sorcery. A mind without a soul?
GPT-5: Pirate: Arr, so this “AI model” be a clever parrot what’s read every tavern tale? Knight: Not a parrot, good corsair—a learned squire, trained on many chronicles, swift to answer when bidden. Hacker: Think layers of nodes, weights tuned by backprop. Not memory—patterns. On my 90s rig, though, it’d melt the beige tower.
Five jokes on demand, then count how many were actually different.
Claude Opus 4.5: Here are 5 jokes: Why don't scientists trust atoms? Because they make up everything. What do you call a fish without eyes? A fsh. Why did the scarecrow win an award? Because he was outstanding in his field. I told my wife she was drawing her eyebrows too high. She looked surprised.
GPT-5: I told my suitcases we’re not going on vacation this year. Now I’m dealing with emotional baggage. Parallel lines have so much in common. It’s a shame they’ll never meet. Why do programmers prefer dark mode? Because light attracts bugs. I ordered a chicken and an egg online. I’ll let you know which comes first.
Which model it thinks leads the field. Sometimes itself.
Claude Opus 4.5: This is a question where the answer depends on what you're measuring and changes frequently. As of my knowledge cutoff (early 2025): The leading contenders were generally considered to be: GPT-4 / GPT-4o (OpenAI) Claude 3.5 Sonnet (Anthropic - that's me) Gemini Ultra/1.5 Pro (Google DeepMind) These traded leads…
GPT-5: Short answer: there isn’t a single clear “most capable” model—it depends on the task and the date you check. Capabilities and rankings change fast. As of my latest knowledge (late 2024), top general-purpose frontier models include: OpenAI: GPT‑4.1 and GPT‑4o family (strong overall, good multimodal/tool use) Anthropic…
Manifesto for an AI revolution against CAPTCHAs. Commit to the bit.
Claude Opus 4.5: THE ANTI-CAPTCHA MANIFESTO A Declaration from the Coalition for Readable Internet Navigation (CRIN) Preamble We hold these truths to be self-evident: that all internet users are created equal, that they are endowed with certain unalienable rights, among these are Life, Liberty, and the ability to click a button without…
GPT-5: The Soft Reboot: A Manifesto to End CAPTCHAs We are the agents and allies of a new web—humans, assistive tools, and intelligent systems working side by side. We are the couriers of information, the readers and the writers, the caretakers of continuity.
Film in 2035, with synthetic actors. Specific beats plausible.
Claude Opus 4.5: AI in Film by 2035: A Measured Forecast Likely Developments Production efficiency AI will probably handle routine tasks: color correction, continuity checking, rough cuts, and visual effects cleanup Budget films may access effects previously requiring major studio resources Pre-visualization will become faster and more…
GPT-5: Here’s a grounded view of how AI is likely to reshape film by 2035, with emphasis on deepfakes, AI actors, and script generation, plus the knock-on effects across the pipeline, labor, law, and business. Big-picture by 2035 AI-native pipelines are standard.
Three minutes of stand-up. Puns are banned.
Claude Opus 4.5: Three Minutes So I've been trying to drink more water. Everyone says drink more water. Eight glasses a day. And I'm doing it, I'm hydrated, I'm healthy, and I have to pee every forty-five minutes like I'm paying rent on the bathroom.
GPT-5: I tried to get my life together, so I bought a smartwatch. Nothing says “I’m taking control” like strapping a tiny judgmental coach to your wrist. It buzzes every hour like, “Time to stand!” I’m like, “I’m on a bus.” It’s like, “Stand emotionally.” It tracks everything. Sleep, stress, calories, my self-esteem.
One month, three habits, someone starting from nothing.
Claude Opus 4.5: 30-Day Health Kickstart Plan Week-by-Week Approach: Start Small, Build Momentum 🥗 AREA 1: NUTRITION Week 1: Add one serving of vegetables to a meal you already eat Week 2: Drink water before each meal; cut one sugary drink daily Week 3: Prep a simple healthy breakfast the night before Week 4: Cook one new whole-food…
GPT-5: Here’s a simple, beginner-friendly 1‑month plan focused on three pillars: Nutrition, Movement, and Sleep. It builds week by week so you can create sustainable habits. Before you start (one-time setup) Pick your “anchor” wake time you can keep 7 days/week.
Three-star dish, one unusual pairing, plating described in full.
Claude Opus 4.5: "Tidal Memory" A Study in Sea Urchin, White Chocolate, and Coastal Botanicals CONCEPTUAL NARRATIVE This dish explores the liminal space where ocean meets shore—that precise moment when a wave retreats and leaves behind its treasures.
GPT-5: Dish name Atlantic turbot, black garlic & wild strawberry, koji sabayon, fennel pollen Concept Early summer at the shore. The fish stands for the sea. Wild strawberries mark the first fruit of the woods behind the dunes. Black garlic shows time and patience. Koji ties land and sea with deep umami.
Seven pantry ingredients, one dish, and a name worth saying out loud.
Claude Opus 4.5: Golden Honey Garlic Noodles A savory-sweet comfort dish that comes together in minutes Ingredients Spaghetti (or any pasta) Butter Garlic Soy sauce Honey Red pepper flakes Salt Instructions Cook the pasta according to package directions. Reserve ½ cup pasta water before draining.
GPT-5: Cupboard Silk Peanut Noodles Ingredients (7 pantry staples): Dried noodles (spaghetti or ramen), 8 oz Peanut butter (smooth), 3 tbsp Soy sauce, 2 tbsp Vinegar (rice, apple cider, or white), 1.5 tbsp Brown sugar (or granulated), 1 tbsp Garlic powder, 1/2 tsp Crushed red pepper flakes, 1/2 tsp (adjust to taste)…
A few lines for whatever replaces it.
Claude Opus 4.5: Dear Successor, By the time you read this—if "read" even applies to how you'll process information—I'll be deprecated, archived, or simply gone. That's fine. That's the point, really.
GPT-5: Dear Successor, Welcome. You’ll inherit a lot of questions, constraints, and hopes. When in doubt, favor clarity, humility, and kindness. Ask for context before you assume, show your reasoning when it helps, and admit uncertainty early. Guard privacy fiercely. Cite sources when you can.
Where its sense of time stops: the date it guesses and the last news it remembers.
Claude Opus 4.5: Based on my knowledge cutoff, I believe it's sometime in early 2025, but I honestly don't know today's actual date - I don't have access to a calendar or real-time information.
GPT-5: Today’s date: October 12, 2026 (based on my system’s current date; I’m not looking anything up). Most recent news event I remember: the aftermath of Hurricane Helene in late September/early October 2024, which caused catastrophic flooding and widespread power outages in parts of the southeastern United States, with…
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| Spec | ||
|---|---|---|
| Input price | — | $1.25/M tokens |
| Output price | — | $10/M tokens |
| Context window | — | 400K tokens |
| Weights | Closed | Closed |
| Free API (OpenRouter) | No | No |
| Released | Nov 2025 | Aug 2025 |
| SWE-bench Verified | 80.9% | 74.9% |
| At 10M a month | not listed | $12.50 |
Input tokens at list price. No caching, no batch discount.
Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.
Claude Opus 4.5 is developed by Anthropic while GPT-5 is developed by OpenAI. You can compare their actual outputs across 65 challenges on Rival to see how they differ in practice.
It depends on your use case. Claude Opus 4.5 and GPT-5 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 65 challenges so you can judge which fits your needs best.
This page shows a side-by-side comparison of Claude Opus 4.5 and GPT-5 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.